./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:52:48,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:52:48,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:52:48,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:52:48,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:52:48,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:52:48,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:52:48,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:52:48,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:52:48,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:52:48,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:52:48,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:52:48,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:52:48,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:52:48,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:52:48,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:52:48,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:52:48,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:52:48,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:52:48,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:52:48,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:52:48,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:52:48,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:52:48,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:52:48,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:52:48,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:52:48,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:52:48,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:52:48,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:52:48,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:52:48,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:52:48,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:52:48,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:52:48,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:52:48,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:52:48,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:52:48,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:52:48,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:52:48,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:52:48,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:52:48,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:52:48,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-19 06:52:48,450 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:52:48,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:52:48,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:52:48,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:52:48,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:52:48,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:52:48,453 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:52:48,453 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:52:48,454 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:52:48,454 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:52:48,455 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:52:48,455 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:52:48,455 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:52:48,456 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:52:48,456 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:52:48,456 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:52:48,456 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:52:48,457 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:52:48,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:52:48,457 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:52:48,458 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 06:52:48,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:52:48,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:52:48,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:52:48,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:52:48,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:52:48,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:52:48,461 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-19 06:52:48,461 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:52:48,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:52:48,461 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:52:48,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:52:48,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:52:48,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:52:48,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:52:48,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:52:48,463 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:52:48,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:52:48,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:52:48,463 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:52:48,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:52:48,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:52:48,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:52:48,464 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_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 [2022-11-19 06:52:48,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:52:48,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:52:48,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:52:48,841 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:52:48,842 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:52:48,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2022-11-19 06:52:48,913 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/data/d01bce65d/b2888d3dc87248a5aa4fab5203a9b9fb/FLAG4d6795706 [2022-11-19 06:52:49,436 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:52:49,437 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2022-11-19 06:52:49,451 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/data/d01bce65d/b2888d3dc87248a5aa4fab5203a9b9fb/FLAG4d6795706 [2022-11-19 06:52:49,820 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/data/d01bce65d/b2888d3dc87248a5aa4fab5203a9b9fb [2022-11-19 06:52:49,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:52:49,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:52:49,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:52:49,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:52:49,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:52:49,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:52:49" (1/1) ... [2022-11-19 06:52:49,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c57c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:49, skipping insertion in model container [2022-11-19 06:52:49,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:52:49" (1/1) ... [2022-11-19 06:52:49,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:52:49,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:52:50,219 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2022-11-19 06:52:50,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:52:50,253 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:52:50,314 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2022-11-19 06:52:50,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:52:50,347 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:52:50,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50 WrapperNode [2022-11-19 06:52:50,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:52:50,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:52:50,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:52:50,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:52:50,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (1/1) ... [2022-11-19 06:52:50,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (1/1) ... [2022-11-19 06:52:50,428 INFO L138 Inliner]: procedures = 27, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 398 [2022-11-19 06:52:50,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:52:50,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:52:50,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:52:50,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:52:50,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (1/1) ... [2022-11-19 06:52:50,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (1/1) ... [2022-11-19 06:52:50,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (1/1) ... [2022-11-19 06:52:50,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (1/1) ... [2022-11-19 06:52:50,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (1/1) ... [2022-11-19 06:52:50,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (1/1) ... [2022-11-19 06:52:50,499 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (1/1) ... [2022-11-19 06:52:50,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (1/1) ... [2022-11-19 06:52:50,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:52:50,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:52:50,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:52:50,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:52:50,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (1/1) ... [2022-11-19 06:52:50,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:52:50,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:52:50,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:52:50,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:52:50,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:52:50,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:52:50,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:52:50,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:52:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 06:52:50,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 06:52:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 06:52:50,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 06:52:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 06:52:50,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 06:52:50,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-19 06:52:50,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-19 06:52:50,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:52:50,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 06:52:50,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 06:52:50,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:52:50,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:52:50,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:52:50,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:52:50,621 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 06:52:50,775 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:52:50,777 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:52:51,603 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:52:52,270 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:52:52,270 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-19 06:52:52,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:52:52 BoogieIcfgContainer [2022-11-19 06:52:52,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:52:52,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:52:52,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:52:52,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:52:52,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:52:49" (1/3) ... [2022-11-19 06:52:52,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21466e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:52:52, skipping insertion in model container [2022-11-19 06:52:52,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:50" (2/3) ... [2022-11-19 06:52:52,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21466e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:52:52, skipping insertion in model container [2022-11-19 06:52:52,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:52:52" (3/3) ... [2022-11-19 06:52:52,288 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2022-11-19 06:52:52,303 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-19 06:52:52,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:52:52,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-19 06:52:52,315 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 06:52:52,545 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-19 06:52:52,585 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 06:52:52,605 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 304 transitions, 640 flow [2022-11-19 06:52:52,608 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 304 transitions, 640 flow [2022-11-19 06:52:52,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 304 transitions, 640 flow [2022-11-19 06:52:52,803 INFO L130 PetriNetUnfolder]: 22/300 cut-off events. [2022-11-19 06:52:52,803 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-19 06:52:52,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 300 events. 22/300 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 303 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 254. Up to 2 conditions per place. [2022-11-19 06:52:52,819 INFO L119 LiptonReduction]: Number of co-enabled transitions 4644 [2022-11-19 06:53:17,466 INFO L134 LiptonReduction]: Checked pairs total: 10232 [2022-11-19 06:53:17,467 INFO L136 LiptonReduction]: Total number of compositions: 309 [2022-11-19 06:53:17,475 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 81 places, 75 transitions, 182 flow [2022-11-19 06:53:19,019 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28331 states, 25491 states have (on average 4.875877760778314) internal successors, (124291), 28330 states have internal predecessors, (124291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:19,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:53:19,055 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;@5b24382f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:53:19,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2022-11-19 06:53:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 28331 states, 25491 states have (on average 4.875877760778314) internal successors, (124291), 28330 states have internal predecessors, (124291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 06:53:19,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:19,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 06:53:19,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:19,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:19,128 INFO L85 PathProgramCache]: Analyzing trace with hash 52739, now seen corresponding path program 1 times [2022-11-19 06:53:19,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:19,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154678609] [2022-11-19 06:53:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:19,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:19,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154678609] [2022-11-19 06:53:19,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154678609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:19,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:19,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:53:19,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128239700] [2022-11-19 06:53:19,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:19,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:19,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:19,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:19,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:19,833 INFO L87 Difference]: Start difference. First operand has 28331 states, 25491 states have (on average 4.875877760778314) internal successors, (124291), 28330 states have internal predecessors, (124291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:20,630 INFO L93 Difference]: Finished difference Result 17939 states and 77919 transitions. [2022-11-19 06:53:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:20,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 06:53:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:20,899 INFO L225 Difference]: With dead ends: 17939 [2022-11-19 06:53:20,900 INFO L226 Difference]: Without dead ends: 17939 [2022-11-19 06:53:20,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:20,905 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:20,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 12 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:53:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17939 states. [2022-11-19 06:53:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17939 to 8976. [2022-11-19 06:53:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8976 states, 8539 states have (on average 4.563649139243471) internal successors, (38969), 8975 states have internal predecessors, (38969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:21,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8976 states to 8976 states and 38969 transitions. [2022-11-19 06:53:21,835 INFO L78 Accepts]: Start accepts. Automaton has 8976 states and 38969 transitions. Word has length 2 [2022-11-19 06:53:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:21,835 INFO L495 AbstractCegarLoop]: Abstraction has 8976 states and 38969 transitions. [2022-11-19 06:53:21,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 8976 states and 38969 transitions. [2022-11-19 06:53:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 06:53:21,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:21,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 06:53:21,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:53:21,843 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:21,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1637986, now seen corresponding path program 1 times [2022-11-19 06:53:21,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:21,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987807035] [2022-11-19 06:53:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:21,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:22,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:22,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987807035] [2022-11-19 06:53:22,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987807035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:22,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985051151] [2022-11-19 06:53:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:22,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:22,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:22,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:22,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:53:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:22,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:53:22,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:22,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:22,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985051151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:22,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:53:22,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-11-19 06:53:22,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512296946] [2022-11-19 06:53:22,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:22,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:53:22,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:22,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:53:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:53:22,267 INFO L87 Difference]: Start difference. First operand 8976 states and 38969 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:23,003 INFO L93 Difference]: Finished difference Result 17936 states and 77916 transitions. [2022-11-19 06:53:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:53:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 06:53:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:23,180 INFO L225 Difference]: With dead ends: 17936 [2022-11-19 06:53:23,181 INFO L226 Difference]: Without dead ends: 17936 [2022-11-19 06:53:23,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:53:23,182 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:23,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 18 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:53:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17936 states. [2022-11-19 06:53:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17936 to 8973. [2022-11-19 06:53:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8973 states, 8539 states have (on average 4.563297810048015) internal successors, (38966), 8972 states have internal predecessors, (38966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:24,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 38966 transitions. [2022-11-19 06:53:24,422 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 38966 transitions. Word has length 3 [2022-11-19 06:53:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:24,422 INFO L495 AbstractCegarLoop]: Abstraction has 8973 states and 38966 transitions. [2022-11-19 06:53:24,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 38966 transitions. [2022-11-19 06:53:24,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 06:53:24,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:24,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 06:53:24,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 06:53:24,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:24,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:24,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1637987, now seen corresponding path program 1 times [2022-11-19 06:53:24,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:24,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941083495] [2022-11-19 06:53:24,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:24,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:24,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:24,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941083495] [2022-11-19 06:53:24,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941083495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:24,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809232362] [2022-11-19 06:53:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:24,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:24,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:24,693 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:24,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:53:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:24,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:53:24,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:24,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:24,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809232362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:24,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628752128] [2022-11-19 06:53:24,913 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 06:53:24,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:53:24,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-19 06:53:24,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775475328] [2022-11-19 06:53:24,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:24,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:53:24,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:24,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:53:24,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:53:24,916 INFO L87 Difference]: Start difference. First operand 8973 states and 38966 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:26,185 INFO L93 Difference]: Finished difference Result 44834 states and 194784 transitions. [2022-11-19 06:53:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:53:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 06:53:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:27,044 INFO L225 Difference]: With dead ends: 44834 [2022-11-19 06:53:27,044 INFO L226 Difference]: Without dead ends: 44834 [2022-11-19 06:53:27,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:53:27,050 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 368 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:27,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 30 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:53:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44834 states. [2022-11-19 06:53:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44834 to 8982. [2022-11-19 06:53:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8982 states, 8548 states have (on average 4.56059897051942) internal successors, (38984), 8981 states have internal predecessors, (38984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8982 states to 8982 states and 38984 transitions. [2022-11-19 06:53:28,157 INFO L78 Accepts]: Start accepts. Automaton has 8982 states and 38984 transitions. Word has length 3 [2022-11-19 06:53:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:28,158 INFO L495 AbstractCegarLoop]: Abstraction has 8982 states and 38984 transitions. [2022-11-19 06:53:28,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 8982 states and 38984 transitions. [2022-11-19 06:53:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:53:28,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:28,159 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 06:53:28,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:28,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-19 06:53:28,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1555656132, now seen corresponding path program 2 times [2022-11-19 06:53:28,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:28,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721663828] [2022-11-19 06:53:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:28,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:28,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:28,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721663828] [2022-11-19 06:53:28,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721663828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:28,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933883140] [2022-11-19 06:53:28,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:53:28,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:28,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:28,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:28,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:53:28,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 06:53:28,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:53:28,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:53:28,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:53:28,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:28,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933883140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:28,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:53:28,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-19 06:53:28,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413520937] [2022-11-19 06:53:28,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:28,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:28,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:28,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:28,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:53:28,751 INFO L87 Difference]: Start difference. First operand 8982 states and 38984 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:29,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:29,224 INFO L93 Difference]: Finished difference Result 8981 states and 38983 transitions. [2022-11-19 06:53:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:29,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:53:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:29,314 INFO L225 Difference]: With dead ends: 8981 [2022-11-19 06:53:29,315 INFO L226 Difference]: Without dead ends: 8981 [2022-11-19 06:53:29,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:53:29,316 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:29,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:53:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8981 states. [2022-11-19 06:53:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8981 to 8977. [2022-11-19 06:53:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8977 states, 8544 states have (on average 4.561680711610487) internal successors, (38975), 8976 states have internal predecessors, (38975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8977 states to 8977 states and 38975 transitions. [2022-11-19 06:53:29,851 INFO L78 Accepts]: Start accepts. Automaton has 8977 states and 38975 transitions. Word has length 6 [2022-11-19 06:53:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:29,852 INFO L495 AbstractCegarLoop]: Abstraction has 8977 states and 38975 transitions. [2022-11-19 06:53:29,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 8977 states and 38975 transitions. [2022-11-19 06:53:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:53:29,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:29,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:29,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:30,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:30,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1133642266, now seen corresponding path program 1 times [2022-11-19 06:53:30,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:30,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891815391] [2022-11-19 06:53:30,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:30,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:30,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:30,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891815391] [2022-11-19 06:53:30,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891815391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:30,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:30,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:53:30,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661710242] [2022-11-19 06:53:30,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:30,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:30,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:30,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:30,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:30,134 INFO L87 Difference]: Start difference. First operand 8977 states and 38975 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:30,433 INFO L93 Difference]: Finished difference Result 7701 states and 33322 transitions. [2022-11-19 06:53:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:30,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:53:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:30,497 INFO L225 Difference]: With dead ends: 7701 [2022-11-19 06:53:30,497 INFO L226 Difference]: Without dead ends: 7701 [2022-11-19 06:53:30,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:30,499 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:30,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 3 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2022-11-19 06:53:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 7701. [2022-11-19 06:53:30,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7701 states, 7412 states have (on average 4.4956826767404205) internal successors, (33322), 7700 states have internal predecessors, (33322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7701 states to 7701 states and 33322 transitions. [2022-11-19 06:53:30,917 INFO L78 Accepts]: Start accepts. Automaton has 7701 states and 33322 transitions. Word has length 7 [2022-11-19 06:53:30,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:30,918 INFO L495 AbstractCegarLoop]: Abstraction has 7701 states and 33322 transitions. [2022-11-19 06:53:30,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 7701 states and 33322 transitions. [2022-11-19 06:53:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:53:30,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:30,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:53:30,919 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1133642267, now seen corresponding path program 1 times [2022-11-19 06:53:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:30,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208024104] [2022-11-19 06:53:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:30,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:31,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:31,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208024104] [2022-11-19 06:53:31,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208024104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:31,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:31,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:53:31,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186335754] [2022-11-19 06:53:31,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:31,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:31,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:31,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:31,006 INFO L87 Difference]: Start difference. First operand 7701 states and 33322 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:31,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:31,289 INFO L93 Difference]: Finished difference Result 12835 states and 55312 transitions. [2022-11-19 06:53:31,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:31,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:53:31,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:31,588 INFO L225 Difference]: With dead ends: 12835 [2022-11-19 06:53:31,588 INFO L226 Difference]: Without dead ends: 12835 [2022-11-19 06:53:31,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:31,590 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:31,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:53:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2022-11-19 06:53:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 8977. [2022-11-19 06:53:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8977 states, 8688 states have (on average 4.632711786372007) internal successors, (40249), 8976 states have internal predecessors, (40249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8977 states to 8977 states and 40249 transitions. [2022-11-19 06:53:32,074 INFO L78 Accepts]: Start accepts. Automaton has 8977 states and 40249 transitions. Word has length 7 [2022-11-19 06:53:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:32,074 INFO L495 AbstractCegarLoop]: Abstraction has 8977 states and 40249 transitions. [2022-11-19 06:53:32,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 8977 states and 40249 transitions. [2022-11-19 06:53:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:53:32,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:32,075 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-19 06:53:32,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:53:32,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:32,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1108579749, now seen corresponding path program 1 times [2022-11-19 06:53:32,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:32,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086239734] [2022-11-19 06:53:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:32,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:32,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:32,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086239734] [2022-11-19 06:53:32,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086239734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:32,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321214641] [2022-11-19 06:53:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:32,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:32,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:32,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:32,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:53:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:32,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:53:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:32,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:32,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321214641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:32,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [797832313] [2022-11-19 06:53:32,537 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 06:53:32,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:53:32,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-19 06:53:32,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241670031] [2022-11-19 06:53:32,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:32,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:53:32,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:32,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:53:32,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:53:32,540 INFO L87 Difference]: Start difference. First operand 8977 states and 40249 transitions. Second operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:34,788 INFO L93 Difference]: Finished difference Result 98629 states and 442533 transitions. [2022-11-19 06:53:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:53:34,788 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:53:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:35,735 INFO L225 Difference]: With dead ends: 98629 [2022-11-19 06:53:35,736 INFO L226 Difference]: Without dead ends: 98629 [2022-11-19 06:53:35,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:53:35,738 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 945 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:35,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 72 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:53:35,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98629 states. [2022-11-19 06:53:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98629 to 8989. [2022-11-19 06:53:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8989 states, 8700 states have (on average 4.6290804597701145) internal successors, (40273), 8988 states have internal predecessors, (40273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8989 states to 8989 states and 40273 transitions. [2022-11-19 06:53:37,623 INFO L78 Accepts]: Start accepts. Automaton has 8989 states and 40273 transitions. Word has length 7 [2022-11-19 06:53:37,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:37,623 INFO L495 AbstractCegarLoop]: Abstraction has 8989 states and 40273 transitions. [2022-11-19 06:53:37,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:37,623 INFO L276 IsEmpty]: Start isEmpty. Operand 8989 states and 40273 transitions. [2022-11-19 06:53:37,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:53:37,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:37,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:37,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:37,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:37,825 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:37,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:37,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1491432319, now seen corresponding path program 1 times [2022-11-19 06:53:37,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:37,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486753282] [2022-11-19 06:53:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:37,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:37,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:37,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486753282] [2022-11-19 06:53:37,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486753282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:37,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206501663] [2022-11-19 06:53:37,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:37,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:37,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:37,922 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:37,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:53:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 06:53:38,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:38,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:38,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206501663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:38,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:53:38,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2] total 5 [2022-11-19 06:53:38,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910218467] [2022-11-19 06:53:38,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:38,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:53:38,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:38,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:53:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:53:38,183 INFO L87 Difference]: Start difference. First operand 8989 states and 40273 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:38,584 INFO L93 Difference]: Finished difference Result 12516 states and 53179 transitions. [2022-11-19 06:53:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:53:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 06:53:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:38,676 INFO L225 Difference]: With dead ends: 12516 [2022-11-19 06:53:38,677 INFO L226 Difference]: Without dead ends: 12468 [2022-11-19 06:53:38,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:53:38,678 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 105 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:38,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:53:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12468 states. [2022-11-19 06:53:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12468 to 10445. [2022-11-19 06:53:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10445 states, 10156 states have (on average 4.518708152816069) internal successors, (45892), 10444 states have internal predecessors, (45892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10445 states to 10445 states and 45892 transitions. [2022-11-19 06:53:39,516 INFO L78 Accepts]: Start accepts. Automaton has 10445 states and 45892 transitions. Word has length 9 [2022-11-19 06:53:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:39,517 INFO L495 AbstractCegarLoop]: Abstraction has 10445 states and 45892 transitions. [2022-11-19 06:53:39,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 10445 states and 45892 transitions. [2022-11-19 06:53:39,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:53:39,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:39,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:39,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:39,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:39,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1482488395, now seen corresponding path program 1 times [2022-11-19 06:53:39,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:39,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499047551] [2022-11-19 06:53:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:39,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:39,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:39,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499047551] [2022-11-19 06:53:39,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499047551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:39,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:39,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:53:39,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100945658] [2022-11-19 06:53:39,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:39,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:53:39,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:53:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:53:39,847 INFO L87 Difference]: Start difference. First operand 10445 states and 45892 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:40,162 INFO L93 Difference]: Finished difference Result 14068 states and 59276 transitions. [2022-11-19 06:53:40,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:53:40,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 06:53:40,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:40,227 INFO L225 Difference]: With dead ends: 14068 [2022-11-19 06:53:40,228 INFO L226 Difference]: Without dead ends: 13494 [2022-11-19 06:53:40,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:53:40,229 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:40,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 18 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:53:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13494 states. [2022-11-19 06:53:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13494 to 11842. [2022-11-19 06:53:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11842 states, 11553 states have (on average 4.443348048126028) internal successors, (51334), 11841 states have internal predecessors, (51334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11842 states to 11842 states and 51334 transitions. [2022-11-19 06:53:40,622 INFO L78 Accepts]: Start accepts. Automaton has 11842 states and 51334 transitions. Word has length 9 [2022-11-19 06:53:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:40,623 INFO L495 AbstractCegarLoop]: Abstraction has 11842 states and 51334 transitions. [2022-11-19 06:53:40,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 11842 states and 51334 transitions. [2022-11-19 06:53:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 06:53:40,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:40,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:40,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 06:53:40,624 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1594096830, now seen corresponding path program 1 times [2022-11-19 06:53:40,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:40,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680331378] [2022-11-19 06:53:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:40,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:40,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680331378] [2022-11-19 06:53:40,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680331378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935451117] [2022-11-19 06:53:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:40,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:40,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:40,707 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:40,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:53:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:40,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:53:40,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:40,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:40,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935451117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:40,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1395589804] [2022-11-19 06:53:40,975 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 06:53:40,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:53:40,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2022-11-19 06:53:40,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532690547] [2022-11-19 06:53:40,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:40,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:53:40,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:40,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:53:40,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:53:40,978 INFO L87 Difference]: Start difference. First operand 11842 states and 51334 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:41,874 INFO L93 Difference]: Finished difference Result 33920 states and 142749 transitions. [2022-11-19 06:53:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:53:41,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 06:53:41,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:42,043 INFO L225 Difference]: With dead ends: 33920 [2022-11-19 06:53:42,043 INFO L226 Difference]: Without dead ends: 33920 [2022-11-19 06:53:42,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:53:42,043 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 252 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:42,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 15 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:53:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33920 states. [2022-11-19 06:53:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33920 to 20734. [2022-11-19 06:53:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20734 states, 20445 states have (on average 4.616776718023967) internal successors, (94390), 20733 states have internal predecessors, (94390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20734 states to 20734 states and 94390 transitions. [2022-11-19 06:53:43,118 INFO L78 Accepts]: Start accepts. Automaton has 20734 states and 94390 transitions. Word has length 10 [2022-11-19 06:53:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:43,119 INFO L495 AbstractCegarLoop]: Abstraction has 20734 states and 94390 transitions. [2022-11-19 06:53:43,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 20734 states and 94390 transitions. [2022-11-19 06:53:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 06:53:43,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:43,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:43,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:43,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:43,324 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:43,324 INFO L85 PathProgramCache]: Analyzing trace with hash 23198000, now seen corresponding path program 1 times [2022-11-19 06:53:43,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:43,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759278586] [2022-11-19 06:53:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:43,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:43,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:43,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759278586] [2022-11-19 06:53:43,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759278586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:43,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:43,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:53:43,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714655544] [2022-11-19 06:53:43,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:43,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:53:43,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:43,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:53:43,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:53:43,557 INFO L87 Difference]: Start difference. First operand 20734 states and 94390 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:44,141 INFO L93 Difference]: Finished difference Result 28657 states and 126840 transitions. [2022-11-19 06:53:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:53:44,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 06:53:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:44,262 INFO L225 Difference]: With dead ends: 28657 [2022-11-19 06:53:44,262 INFO L226 Difference]: Without dead ends: 28609 [2022-11-19 06:53:44,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:53:44,263 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 200 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:44,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:53:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28609 states. [2022-11-19 06:53:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28609 to 22806. [2022-11-19 06:53:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22806 states, 22589 states have (on average 4.620744610208509) internal successors, (104378), 22805 states have internal predecessors, (104378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22806 states to 22806 states and 104378 transitions. [2022-11-19 06:53:45,455 INFO L78 Accepts]: Start accepts. Automaton has 22806 states and 104378 transitions. Word has length 10 [2022-11-19 06:53:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:45,455 INFO L495 AbstractCegarLoop]: Abstraction has 22806 states and 104378 transitions. [2022-11-19 06:53:45,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 22806 states and 104378 transitions. [2022-11-19 06:53:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 06:53:45,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:45,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:45,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 06:53:45,458 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash 930728058, now seen corresponding path program 1 times [2022-11-19 06:53:45,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:45,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18104360] [2022-11-19 06:53:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:45,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:46,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18104360] [2022-11-19 06:53:46,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18104360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659847739] [2022-11-19 06:53:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:46,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:46,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:46,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:46,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:53:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:46,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 06:53:46,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:46,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:53:46,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:46,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:53:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:46,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:53:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:46,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:47,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:53:47,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-19 06:53:47,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:53:47,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 75 [2022-11-19 06:53:47,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-11-19 06:53:47,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-11-19 06:53:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:47,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659847739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:47,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2037259610] [2022-11-19 06:53:47,162 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 06:53:47,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:53:47,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-11-19 06:53:47,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862278843] [2022-11-19 06:53:47,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:47,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 06:53:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 06:53:47,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=190, Unknown=3, NotChecked=0, Total=240 [2022-11-19 06:53:47,166 INFO L87 Difference]: Start difference. First operand 22806 states and 104378 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:48,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:48,633 INFO L93 Difference]: Finished difference Result 46109 states and 205674 transitions. [2022-11-19 06:53:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:53:48,634 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 06:53:48,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:48,883 INFO L225 Difference]: With dead ends: 46109 [2022-11-19 06:53:48,884 INFO L226 Difference]: Without dead ends: 46109 [2022-11-19 06:53:48,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=323, Unknown=3, NotChecked=0, Total=420 [2022-11-19 06:53:48,884 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 355 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:48,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 52 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 533 Invalid, 0 Unknown, 174 Unchecked, 1.0s Time] [2022-11-19 06:53:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46109 states. [2022-11-19 06:53:50,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46109 to 25354. [2022-11-19 06:53:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25354 states, 25137 states have (on average 4.825038787444803) internal successors, (121287), 25353 states have internal predecessors, (121287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25354 states to 25354 states and 121287 transitions. [2022-11-19 06:53:50,161 INFO L78 Accepts]: Start accepts. Automaton has 25354 states and 121287 transitions. Word has length 11 [2022-11-19 06:53:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:50,162 INFO L495 AbstractCegarLoop]: Abstraction has 25354 states and 121287 transitions. [2022-11-19 06:53:50,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:50,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25354 states and 121287 transitions. [2022-11-19 06:53:50,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 06:53:50,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:50,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:50,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:50,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 06:53:50,367 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:50,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1390683913, now seen corresponding path program 1 times [2022-11-19 06:53:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894270284] [2022-11-19 06:53:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:50,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:50,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:50,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894270284] [2022-11-19 06:53:50,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894270284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:50,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:50,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:53:50,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541570887] [2022-11-19 06:53:50,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:50,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:50,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:50,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:50,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:50,468 INFO L87 Difference]: Start difference. First operand 25354 states and 121287 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:50,841 INFO L93 Difference]: Finished difference Result 24158 states and 112802 transitions. [2022-11-19 06:53:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 06:53:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:51,012 INFO L225 Difference]: With dead ends: 24158 [2022-11-19 06:53:51,013 INFO L226 Difference]: Without dead ends: 24054 [2022-11-19 06:53:51,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:51,014 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:51,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 8 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24054 states. [2022-11-19 06:53:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24054 to 22978. [2022-11-19 06:53:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22978 states, 22761 states have (on average 4.77531742893546) internal successors, (108691), 22977 states have internal predecessors, (108691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22978 states to 22978 states and 108691 transitions. [2022-11-19 06:53:52,277 INFO L78 Accepts]: Start accepts. Automaton has 22978 states and 108691 transitions. Word has length 12 [2022-11-19 06:53:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:52,277 INFO L495 AbstractCegarLoop]: Abstraction has 22978 states and 108691 transitions. [2022-11-19 06:53:52,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 22978 states and 108691 transitions. [2022-11-19 06:53:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 06:53:52,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:52,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:52,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 06:53:52,279 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:52,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1212195059, now seen corresponding path program 1 times [2022-11-19 06:53:52,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637177821] [2022-11-19 06:53:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:52,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:52,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:52,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637177821] [2022-11-19 06:53:52,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637177821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:52,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726690229] [2022-11-19 06:53:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:52,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:52,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:52,952 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:52,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:53:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:53,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 06:53:53,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:53,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:53:53,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:53,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:53:53,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:53,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:53:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:53,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:53:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:53,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:53,999 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_633 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_633) c_~f~0.base) (+ c_~f~0.offset (* c_~j~0 4))) 2147483649)) is different from false [2022-11-19 06:53:54,063 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_633 (Array Int Int)) (v_ArrVal_632 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (< (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_631) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_632) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~j~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483649)) is different from false [2022-11-19 06:53:54,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:53:54,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 06:53:54,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:53:54,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 309 treesize of output 297 [2022-11-19 06:53:54,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 117 [2022-11-19 06:53:54,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 210 [2022-11-19 06:53:54,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-19 06:53:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-19 06:53:54,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726690229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:54,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [345845512] [2022-11-19 06:53:54,796 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 06:53:54,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:53:54,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-19 06:53:54,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852978512] [2022-11-19 06:53:54,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:54,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 06:53:54,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:54,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 06:53:54,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=211, Unknown=7, NotChecked=62, Total=342 [2022-11-19 06:53:54,800 INFO L87 Difference]: Start difference. First operand 22978 states and 108691 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:56,204 INFO L93 Difference]: Finished difference Result 41551 states and 183198 transitions. [2022-11-19 06:53:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:53:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 06:53:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:56,462 INFO L225 Difference]: With dead ends: 41551 [2022-11-19 06:53:56,462 INFO L226 Difference]: Without dead ends: 41551 [2022-11-19 06:53:56,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=325, Unknown=7, NotChecked=78, Total=506 [2022-11-19 06:53:56,463 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 259 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:56,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 63 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 704 Invalid, 0 Unknown, 317 Unchecked, 0.8s Time] [2022-11-19 06:53:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41551 states. [2022-11-19 06:53:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41551 to 22978. [2022-11-19 06:53:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22978 states, 22761 states have (on average 4.770089187645534) internal successors, (108572), 22977 states have internal predecessors, (108572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22978 states to 22978 states and 108572 transitions. [2022-11-19 06:53:57,664 INFO L78 Accepts]: Start accepts. Automaton has 22978 states and 108572 transitions. Word has length 12 [2022-11-19 06:53:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:57,664 INFO L495 AbstractCegarLoop]: Abstraction has 22978 states and 108572 transitions. [2022-11-19 06:53:57,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22978 states and 108572 transitions. [2022-11-19 06:53:57,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:53:57,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:57,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:57,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:57,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 06:53:57,873 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:53:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:57,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1076511910, now seen corresponding path program 1 times [2022-11-19 06:53:57,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:57,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046564014] [2022-11-19 06:53:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:57,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:58,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:58,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046564014] [2022-11-19 06:53:58,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046564014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:58,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828527482] [2022-11-19 06:53:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:58,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:58,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:58,036 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:58,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:53:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:58,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:53:58,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:58,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:58,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828527482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:58,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1890010939] [2022-11-19 06:53:58,460 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 06:53:58,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:53:58,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-19 06:53:58,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508793294] [2022-11-19 06:53:58,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:58,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 06:53:58,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 06:53:58,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:53:58,464 INFO L87 Difference]: Start difference. First operand 22978 states and 108572 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:59,953 INFO L93 Difference]: Finished difference Result 48660 states and 223711 transitions. [2022-11-19 06:53:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 06:53:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 06:53:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:00,213 INFO L225 Difference]: With dead ends: 48660 [2022-11-19 06:54:00,213 INFO L226 Difference]: Without dead ends: 48564 [2022-11-19 06:54:00,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:54:00,214 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 396 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:00,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 63 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 06:54:00,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48564 states. [2022-11-19 06:54:01,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48564 to 30624. [2022-11-19 06:54:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30624 states, 30407 states have (on average 4.9151511165192225) internal successors, (149455), 30623 states have internal predecessors, (149455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30624 states to 30624 states and 149455 transitions. [2022-11-19 06:54:01,654 INFO L78 Accepts]: Start accepts. Automaton has 30624 states and 149455 transitions. Word has length 13 [2022-11-19 06:54:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:01,654 INFO L495 AbstractCegarLoop]: Abstraction has 30624 states and 149455 transitions. [2022-11-19 06:54:01,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 30624 states and 149455 transitions. [2022-11-19 06:54:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:54:01,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:01,657 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1] [2022-11-19 06:54:01,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:54:01,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 06:54:01,864 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:54:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:01,865 INFO L85 PathProgramCache]: Analyzing trace with hash -43719739, now seen corresponding path program 2 times [2022-11-19 06:54:01,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:01,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860104270] [2022-11-19 06:54:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:01,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:02,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:02,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860104270] [2022-11-19 06:54:02,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860104270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:02,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653561604] [2022-11-19 06:54:02,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:54:02,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:02,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:02,097 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:02,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:54:02,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 06:54:02,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:54:02,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:54:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 06:54:02,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:54:02,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653561604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:02,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:54:02,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2022-11-19 06:54:02,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432370637] [2022-11-19 06:54:02,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:02,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:54:02,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:02,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:54:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:54:02,366 INFO L87 Difference]: Start difference. First operand 30624 states and 149455 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:02,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:02,748 INFO L93 Difference]: Finished difference Result 28529 states and 139275 transitions. [2022-11-19 06:54:02,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:54:02,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 06:54:02,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:02,904 INFO L225 Difference]: With dead ends: 28529 [2022-11-19 06:54:02,904 INFO L226 Difference]: Without dead ends: 28529 [2022-11-19 06:54:02,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-19 06:54:02,905 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:02,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 12 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:54:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28529 states. [2022-11-19 06:54:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28529 to 24831. [2022-11-19 06:54:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24831 states, 24651 states have (on average 4.86045190864468) internal successors, (119815), 24830 states have internal predecessors, (119815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24831 states to 24831 states and 119815 transitions. [2022-11-19 06:54:04,337 INFO L78 Accepts]: Start accepts. Automaton has 24831 states and 119815 transitions. Word has length 13 [2022-11-19 06:54:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:04,337 INFO L495 AbstractCegarLoop]: Abstraction has 24831 states and 119815 transitions. [2022-11-19 06:54:04,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 24831 states and 119815 transitions. [2022-11-19 06:54:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 06:54:04,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:04,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:04,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:54:04,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 06:54:04,547 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:54:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:04,547 INFO L85 PathProgramCache]: Analyzing trace with hash 145730681, now seen corresponding path program 1 times [2022-11-19 06:54:04,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:04,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663993059] [2022-11-19 06:54:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:04,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:54:04,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:04,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663993059] [2022-11-19 06:54:04,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663993059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:04,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:04,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:54:04,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802205325] [2022-11-19 06:54:04,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:04,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:54:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:04,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:54:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:54:04,803 INFO L87 Difference]: Start difference. First operand 24831 states and 119815 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:05,347 INFO L93 Difference]: Finished difference Result 25436 states and 121419 transitions. [2022-11-19 06:54:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:54:05,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 06:54:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:05,512 INFO L225 Difference]: With dead ends: 25436 [2022-11-19 06:54:05,512 INFO L226 Difference]: Without dead ends: 25275 [2022-11-19 06:54:05,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:54:05,513 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 158 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:05,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 0 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:54:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25275 states. [2022-11-19 06:54:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25275 to 24386. [2022-11-19 06:54:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24386 states, 24206 states have (on average 4.869701726844584) internal successors, (117876), 24385 states have internal predecessors, (117876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24386 states to 24386 states and 117876 transitions. [2022-11-19 06:54:06,694 INFO L78 Accepts]: Start accepts. Automaton has 24386 states and 117876 transitions. Word has length 14 [2022-11-19 06:54:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:06,694 INFO L495 AbstractCegarLoop]: Abstraction has 24386 states and 117876 transitions. [2022-11-19 06:54:06,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 24386 states and 117876 transitions. [2022-11-19 06:54:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 06:54:06,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:06,695 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-11-19 06:54:06,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 06:54:06,696 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-19 06:54:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:06,696 INFO L85 PathProgramCache]: Analyzing trace with hash -754900453, now seen corresponding path program 1 times [2022-11-19 06:54:06,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:06,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382760802] [2022-11-19 06:54:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:06,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:06,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:06,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382760802] [2022-11-19 06:54:06,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382760802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:06,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572184556] [2022-11-19 06:54:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:06,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:06,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:06,925 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:06,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a074f4-7ce3-43b5-acff-e22dceeff175/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:54:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:07,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 06:54:07,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:07,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:07,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572184556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:07,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [854163322] [2022-11-19 06:54:07,393 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 06:54:07,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:54:07,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-19 06:54:07,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871228180] [2022-11-19 06:54:07,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:07,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 06:54:07,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 06:54:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:54:07,395 INFO L87 Difference]: Start difference. First operand 24386 states and 117876 transitions. Second operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)