./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 b5237d83 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_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/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_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba --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-b5237d8 [2022-11-22 01:58:46,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:58:46,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:58:46,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:58:46,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:58:46,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:58:46,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:58:46,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:58:46,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:58:46,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:58:46,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:58:46,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:58:46,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:58:46,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:58:46,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:58:46,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:58:46,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:58:46,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:58:46,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:58:46,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:58:46,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:58:46,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:58:46,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:58:46,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:58:46,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:58:46,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:58:46,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:58:46,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:58:46,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:58:46,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:58:46,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:58:46,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:58:46,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:58:46,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:58:46,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:58:46,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:58:46,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:58:46,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:58:46,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:58:46,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:58:46,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:58:46,463 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-22 01:58:46,491 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:58:46,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:58:46,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:58:46,492 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:58:46,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:58:46,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:58:46,494 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:58:46,494 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:58:46,494 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:58:46,495 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:58:46,495 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:58:46,495 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:58:46,496 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:58:46,496 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:58:46,497 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:58:46,497 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:58:46,497 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:58:46,498 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:58:46,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:58:46,499 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:58:46,499 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:58:46,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:58:46,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:58:46,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:58:46,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:58:46,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:58:46,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:58:46,502 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-22 01:58:46,502 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:58:46,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:58:46,503 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:58:46,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:58:46,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:58:46,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:58:46,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:58:46,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:58:46,505 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:58:46,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:58:46,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:58:46,505 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:58:46,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:58:46,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:58:46,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:58:46,506 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_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 [2022-11-22 01:58:46,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:58:46,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:58:46,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:58:46,817 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:58:46,817 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:58:46,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2022-11-22 01:58:50,033 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:58:50,261 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:58:50,262 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2022-11-22 01:58:50,270 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/data/bc23bc6e8/9617ee5f03ec4a2e9ec48287bdd03ec9/FLAG07345768d [2022-11-22 01:58:50,287 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/data/bc23bc6e8/9617ee5f03ec4a2e9ec48287bdd03ec9 [2022-11-22 01:58:50,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:58:50,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:58:50,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:58:50,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:58:50,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:58:50,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f2abe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50, skipping insertion in model container [2022-11-22 01:58:50,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:58:50,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:58:50,551 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2022-11-22 01:58:50,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:58:50,572 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:58:50,609 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2022-11-22 01:58:50,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:58:50,632 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:58:50,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50 WrapperNode [2022-11-22 01:58:50,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:58:50,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:58:50,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:58:50,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:58:50,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,700 INFO L138 Inliner]: procedures = 27, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 398 [2022-11-22 01:58:50,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:58:50,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:58:50,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:58:50,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:58:50,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,760 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:58:50,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:58:50,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:58:50,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:58:50,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (1/1) ... [2022-11-22 01:58:50,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:58:50,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:50,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:58:50,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:58:50,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:58:50,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:58:50,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:58:50,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:58:50,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 01:58:50,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 01:58:50,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 01:58:50,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 01:58:50,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-22 01:58:50,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-22 01:58:50,875 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-22 01:58:50,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-22 01:58:50,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:58:50,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 01:58:50,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 01:58:50,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:58:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:58:50,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:58:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:58:50,879 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 01:58:51,092 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:58:51,105 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:58:51,949 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:58:52,599 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:58:52,599 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-22 01:58:52,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:58:52 BoogieIcfgContainer [2022-11-22 01:58:52,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:58:52,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:58:52,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:58:52,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:58:52,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:58:50" (1/3) ... [2022-11-22 01:58:52,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4c84c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:58:52, skipping insertion in model container [2022-11-22 01:58:52,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:50" (2/3) ... [2022-11-22 01:58:52,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4c84c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:58:52, skipping insertion in model container [2022-11-22 01:58:52,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:58:52" (3/3) ... [2022-11-22 01:58:52,624 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2022-11-22 01:58:52,635 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-22 01:58:52,648 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:58:52,648 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-22 01:58:52,648 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 01:58:52,893 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-22 01:58:52,948 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:58:52,982 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 304 transitions, 640 flow [2022-11-22 01:58:52,985 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 304 transitions, 640 flow [2022-11-22 01:58:52,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 304 transitions, 640 flow [2022-11-22 01:58:53,137 INFO L130 PetriNetUnfolder]: 22/300 cut-off events. [2022-11-22 01:58:53,137 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-22 01:58:53,144 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. [2022-11-22 01:58:53,149 INFO L119 LiptonReduction]: Number of co-enabled transitions 4644 [2022-11-22 01:59:18,664 INFO L134 LiptonReduction]: Checked pairs total: 10232 [2022-11-22 01:59:18,664 INFO L136 LiptonReduction]: Total number of compositions: 309 [2022-11-22 01:59:18,673 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 81 places, 75 transitions, 182 flow [2022-11-22 01:59:20,321 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) [2022-11-22 01:59:20,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:59:20,362 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;@76e744f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:59:20,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2022-11-22 01:59:20,415 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) [2022-11-22 01:59:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:59:20,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:20,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:59:20,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 52737, now seen corresponding path program 1 times [2022-11-22 01:59:20,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:20,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488440871] [2022-11-22 01:59:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:20,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:20,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:20,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488440871] [2022-11-22 01:59:20,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488440871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:20,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:20,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:59:20,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658543580] [2022-11-22 01:59:20,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:20,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:59:20,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:59:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:21,031 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) [2022-11-22 01:59:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:22,142 INFO L93 Difference]: Finished difference Result 17939 states and 77919 transitions. [2022-11-22 01:59:22,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:59:22,145 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 [2022-11-22 01:59:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:22,662 INFO L225 Difference]: With dead ends: 17939 [2022-11-22 01:59:22,662 INFO L226 Difference]: Without dead ends: 17939 [2022-11-22 01:59:22,664 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 [2022-11-22 01:59:22,669 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:22,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 12 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:59:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17939 states. [2022-11-22 01:59:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17939 to 8976. [2022-11-22 01:59:23,537 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) [2022-11-22 01:59:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8976 states to 8976 states and 38969 transitions. [2022-11-22 01:59:23,655 INFO L78 Accepts]: Start accepts. Automaton has 8976 states and 38969 transitions. Word has length 2 [2022-11-22 01:59:23,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:23,656 INFO L495 AbstractCegarLoop]: Abstraction has 8976 states and 38969 transitions. [2022-11-22 01:59:23,656 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) [2022-11-22 01:59:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 8976 states and 38969 transitions. [2022-11-22 01:59:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:59:23,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:23,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:59:23,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:59:23,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:23,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:23,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1637829, now seen corresponding path program 1 times [2022-11-22 01:59:23,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:23,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796174943] [2022-11-22 01:59:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:23,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:23,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:23,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796174943] [2022-11-22 01:59:23,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796174943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:23,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962145801] [2022-11-22 01:59:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:23,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:23,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:23,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:23,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:59:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:24,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:59:24,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:24,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:24,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962145801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:24,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [4365106] [2022-11-22 01:59:24,507 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) [2022-11-22 01:59:24,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:59:24,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-22 01:59:24,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649892906] [2022-11-22 01:59:24,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:24,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:59:24,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:24,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:59:24,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:59:24,527 INFO L87 Difference]: Start difference. First operand 8976 states and 38969 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) [2022-11-22 01:59:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:26,142 INFO L93 Difference]: Finished difference Result 44837 states and 194796 transitions. [2022-11-22 01:59:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:59:26,143 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 [2022-11-22 01:59:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:27,006 INFO L225 Difference]: With dead ends: 44837 [2022-11-22 01:59:27,007 INFO L226 Difference]: Without dead ends: 44837 [2022-11-22 01:59:27,008 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 [2022-11-22 01:59:27,011 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 239 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:27,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 36 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:59:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44837 states. [2022-11-22 01:59:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44837 to 8985. [2022-11-22 01:59:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8985 states, 8548 states have (on average 4.56200280767431) internal successors, (38996), 8984 states have internal predecessors, (38996), 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) [2022-11-22 01:59:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8985 states to 8985 states and 38996 transitions. [2022-11-22 01:59:29,047 INFO L78 Accepts]: Start accepts. Automaton has 8985 states and 38996 transitions. Word has length 3 [2022-11-22 01:59:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:29,048 INFO L495 AbstractCegarLoop]: Abstraction has 8985 states and 38996 transitions. [2022-11-22 01:59:29,050 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) [2022-11-22 01:59:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 8985 states and 38996 transitions. [2022-11-22 01:59:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:59:29,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:29,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:59:29,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 01:59:29,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:29,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:29,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:29,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1637830, now seen corresponding path program 1 times [2022-11-22 01:59:29,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:29,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394253401] [2022-11-22 01:59:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:29,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:29,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:29,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394253401] [2022-11-22 01:59:29,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394253401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:29,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786504810] [2022-11-22 01:59:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:29,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:29,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:29,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:29,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:59:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:59:29,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:29,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:59:29,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786504810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:29,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:59:29,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-11-22 01:59:29,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540954806] [2022-11-22 01:59:29,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:29,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:59:29,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:29,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:59:29,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:59:29,734 INFO L87 Difference]: Start difference. First operand 8985 states and 38996 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) [2022-11-22 01:59:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:30,395 INFO L93 Difference]: Finished difference Result 17945 states and 77934 transitions. [2022-11-22 01:59:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:59:30,396 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 [2022-11-22 01:59:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:30,605 INFO L225 Difference]: With dead ends: 17945 [2022-11-22 01:59:30,606 INFO L226 Difference]: Without dead ends: 17945 [2022-11-22 01:59:30,606 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 [2022-11-22 01:59:30,613 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:30,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 18 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:59:30,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17945 states. [2022-11-22 01:59:31,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17945 to 8982. [2022-11-22 01:59:31,311 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) [2022-11-22 01:59:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8982 states to 8982 states and 38984 transitions. [2022-11-22 01:59:31,517 INFO L78 Accepts]: Start accepts. Automaton has 8982 states and 38984 transitions. Word has length 3 [2022-11-22 01:59:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:31,518 INFO L495 AbstractCegarLoop]: Abstraction has 8982 states and 38984 transitions. [2022-11-22 01:59:31,518 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) [2022-11-22 01:59:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 8982 states and 38984 transitions. [2022-11-22 01:59:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:59:31,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:31,519 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-22 01:59:31,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:31,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:31,739 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:31,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1550884609, now seen corresponding path program 2 times [2022-11-22 01:59:31,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:31,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204268412] [2022-11-22 01:59:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:31,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:31,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204268412] [2022-11-22 01:59:31,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204268412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258956106] [2022-11-22 01:59:31,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:59:31,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:31,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:31,958 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:31,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:59:32,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 01:59:32,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:59:32,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:59:32,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:59:32,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:59:32,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258956106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:32,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:59:32,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-22 01:59:32,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539761325] [2022-11-22 01:59:32,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:32,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:59:32,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:59:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:59:32,237 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) [2022-11-22 01:59:32,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:32,438 INFO L93 Difference]: Finished difference Result 8981 states and 38983 transitions. [2022-11-22 01:59:32,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:59:32,438 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 [2022-11-22 01:59:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:32,523 INFO L225 Difference]: With dead ends: 8981 [2022-11-22 01:59:32,523 INFO L226 Difference]: Without dead ends: 8981 [2022-11-22 01:59:32,524 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 [2022-11-22 01:59:32,525 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:32,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:59:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8981 states. [2022-11-22 01:59:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8981 to 8977. [2022-11-22 01:59:32,982 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) [2022-11-22 01:59:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8977 states to 8977 states and 38975 transitions. [2022-11-22 01:59:33,237 INFO L78 Accepts]: Start accepts. Automaton has 8977 states and 38975 transitions. Word has length 6 [2022-11-22 01:59:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:33,237 INFO L495 AbstractCegarLoop]: Abstraction has 8977 states and 38975 transitions. [2022-11-22 01:59:33,238 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) [2022-11-22 01:59:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand 8977 states and 38975 transitions. [2022-11-22 01:59:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:59:33,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:33,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:33,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:33,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:33,446 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1162301208, now seen corresponding path program 1 times [2022-11-22 01:59:33,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:33,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156770152] [2022-11-22 01:59:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:33,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:33,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156770152] [2022-11-22 01:59:33,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156770152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:33,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:33,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:59:33,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590026550] [2022-11-22 01:59:33,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:33,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:59:33,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:59:33,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:33,583 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) [2022-11-22 01:59:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:33,934 INFO L93 Difference]: Finished difference Result 14111 states and 60965 transitions. [2022-11-22 01:59:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:59:33,935 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 [2022-11-22 01:59:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:34,069 INFO L225 Difference]: With dead ends: 14111 [2022-11-22 01:59:34,070 INFO L226 Difference]: Without dead ends: 14111 [2022-11-22 01:59:34,070 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 [2022-11-22 01:59:34,071 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:34,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:59:34,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14111 states. [2022-11-22 01:59:34,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14111 to 10253. [2022-11-22 01:59:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 9820 states have (on average 4.6743380855397145) internal successors, (45902), 10252 states have internal predecessors, (45902), 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) [2022-11-22 01:59:34,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 45902 transitions. [2022-11-22 01:59:34,851 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 45902 transitions. Word has length 7 [2022-11-22 01:59:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:34,852 INFO L495 AbstractCegarLoop]: Abstraction has 10253 states and 45902 transitions. [2022-11-22 01:59:34,852 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) [2022-11-22 01:59:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 45902 transitions. [2022-11-22 01:59:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:59:34,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:34,853 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-22 01:59:34,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:59:34,854 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1137208899, now seen corresponding path program 1 times [2022-11-22 01:59:34,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:34,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449225979] [2022-11-22 01:59:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:34,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:35,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:35,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449225979] [2022-11-22 01:59:35,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449225979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:35,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982108923] [2022-11-22 01:59:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:35,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:35,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:35,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:35,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:59:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:59:35,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:35,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:35,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982108923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:35,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [400992250] [2022-11-22 01:59:35,334 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) [2022-11-22 01:59:35,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:59:35,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-22 01:59:35,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065550001] [2022-11-22 01:59:35,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:35,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:59:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:35,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:59:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:59:35,338 INFO L87 Difference]: Start difference. First operand 10253 states and 45902 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) [2022-11-22 01:59:37,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:37,993 INFO L93 Difference]: Finished difference Result 112665 states and 504716 transitions. [2022-11-22 01:59:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:59:37,998 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 [2022-11-22 01:59:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:39,404 INFO L225 Difference]: With dead ends: 112665 [2022-11-22 01:59:39,404 INFO L226 Difference]: Without dead ends: 112665 [2022-11-22 01:59:39,404 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 [2022-11-22 01:59:39,405 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 782 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:39,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 72 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:59:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112665 states. [2022-11-22 01:59:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112665 to 10265. [2022-11-22 01:59:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10265 states, 9832 states have (on average 4.6710740439381615) internal successors, (45926), 10264 states have internal predecessors, (45926), 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) [2022-11-22 01:59:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10265 states to 10265 states and 45926 transitions. [2022-11-22 01:59:42,189 INFO L78 Accepts]: Start accepts. Automaton has 10265 states and 45926 transitions. Word has length 7 [2022-11-22 01:59:42,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:42,190 INFO L495 AbstractCegarLoop]: Abstraction has 10265 states and 45926 transitions. [2022-11-22 01:59:42,190 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) [2022-11-22 01:59:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 10265 states and 45926 transitions. [2022-11-22 01:59:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:59:42,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:42,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:42,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:42,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 01:59:42,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:42,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:42,406 INFO L85 PathProgramCache]: Analyzing trace with hash 280007166, now seen corresponding path program 1 times [2022-11-22 01:59:42,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:42,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908405898] [2022-11-22 01:59:42,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:42,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:42,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:42,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908405898] [2022-11-22 01:59:42,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908405898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:42,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:42,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:59:42,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219634095] [2022-11-22 01:59:42,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:42,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:59:42,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:42,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:59:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:42,506 INFO L87 Difference]: Start difference. First operand 10265 states and 45926 transitions. Second operand has 3 states, 2 states have (on average 4.5) 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) [2022-11-22 01:59:42,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:42,701 INFO L93 Difference]: Finished difference Result 8989 states and 40273 transitions. [2022-11-22 01:59:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:59:42,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) 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 [2022-11-22 01:59:42,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:42,763 INFO L225 Difference]: With dead ends: 8989 [2022-11-22 01:59:42,763 INFO L226 Difference]: Without dead ends: 8989 [2022-11-22 01:59:42,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:42,765 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 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 [2022-11-22 01:59:42,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 3 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:59:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8989 states. [2022-11-22 01:59:43,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8989 to 8989. [2022-11-22 01:59:43,045 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) [2022-11-22 01:59:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8989 states to 8989 states and 40273 transitions. [2022-11-22 01:59:43,098 INFO L78 Accepts]: Start accepts. Automaton has 8989 states and 40273 transitions. Word has length 9 [2022-11-22 01:59:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:43,099 INFO L495 AbstractCegarLoop]: Abstraction has 8989 states and 40273 transitions. [2022-11-22 01:59:43,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) 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) [2022-11-22 01:59:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8989 states and 40273 transitions. [2022-11-22 01:59:43,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:59:43,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:43,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:43,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:59:43,102 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash 280007167, now seen corresponding path program 1 times [2022-11-22 01:59:43,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:43,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385007791] [2022-11-22 01:59:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:43,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:43,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:43,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385007791] [2022-11-22 01:59:43,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385007791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:43,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183414917] [2022-11-22 01:59:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:43,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:43,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:43,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:43,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:59:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:43,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:59:43,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:43,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:59:43,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183414917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:43,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:59:43,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2] total 5 [2022-11-22 01:59:43,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080126944] [2022-11-22 01:59:43,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:43,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:59:43,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:43,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:59:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:59:43,821 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) [2022-11-22 01:59:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:44,202 INFO L93 Difference]: Finished difference Result 12516 states and 53179 transitions. [2022-11-22 01:59:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:59:44,203 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 [2022-11-22 01:59:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:44,307 INFO L225 Difference]: With dead ends: 12516 [2022-11-22 01:59:44,308 INFO L226 Difference]: Without dead ends: 12468 [2022-11-22 01:59:44,308 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 [2022-11-22 01:59:44,311 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:44,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:59:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12468 states. [2022-11-22 01:59:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12468 to 10445. [2022-11-22 01:59:44,662 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) [2022-11-22 01:59:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10445 states to 10445 states and 45892 transitions. [2022-11-22 01:59:44,727 INFO L78 Accepts]: Start accepts. Automaton has 10445 states and 45892 transitions. Word has length 9 [2022-11-22 01:59:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:44,727 INFO L495 AbstractCegarLoop]: Abstraction has 10445 states and 45892 transitions. [2022-11-22 01:59:44,728 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) [2022-11-22 01:59:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 10445 states and 45892 transitions. [2022-11-22 01:59:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:59:44,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:44,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:44,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:44,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:44,949 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash 288951091, now seen corresponding path program 1 times [2022-11-22 01:59:44,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:44,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44711633] [2022-11-22 01:59:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:44,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:45,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:45,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44711633] [2022-11-22 01:59:45,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44711633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:45,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:45,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:59:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696301516] [2022-11-22 01:59:45,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:45,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:59:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:45,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:59:45,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:59:45,133 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) [2022-11-22 01:59:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:45,500 INFO L93 Difference]: Finished difference Result 14068 states and 59276 transitions. [2022-11-22 01:59:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:59:45,501 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 [2022-11-22 01:59:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:45,866 INFO L225 Difference]: With dead ends: 14068 [2022-11-22 01:59:45,866 INFO L226 Difference]: Without dead ends: 13494 [2022-11-22 01:59:45,866 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 [2022-11-22 01:59:45,867 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 [2022-11-22 01:59:45,867 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] [2022-11-22 01:59:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13494 states. [2022-11-22 01:59:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13494 to 11842. [2022-11-22 01:59:46,220 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) [2022-11-22 01:59:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11842 states to 11842 states and 51334 transitions. [2022-11-22 01:59:46,280 INFO L78 Accepts]: Start accepts. Automaton has 11842 states and 51334 transitions. Word has length 9 [2022-11-22 01:59:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:46,281 INFO L495 AbstractCegarLoop]: Abstraction has 11842 states and 51334 transitions. [2022-11-22 01:59:46,281 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) [2022-11-22 01:59:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 11842 states and 51334 transitions. [2022-11-22 01:59:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:59:46,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:46,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:46,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:59:46,283 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash 624680379, now seen corresponding path program 1 times [2022-11-22 01:59:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:46,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464427300] [2022-11-22 01:59:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:46,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:46,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464427300] [2022-11-22 01:59:46,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464427300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:46,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41703014] [2022-11-22 01:59:46,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:46,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:46,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:46,398 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:46,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:59:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:46,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:59:46,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:46,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:46,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41703014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:46,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79909765] [2022-11-22 01:59:46,690 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) [2022-11-22 01:59:46,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:59:46,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-22 01:59:46,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716448385] [2022-11-22 01:59:46,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:46,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:59:46,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:46,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:59:46,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:59:46,697 INFO L87 Difference]: Start difference. First operand 11842 states and 51334 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 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) [2022-11-22 01:59:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:47,664 INFO L93 Difference]: Finished difference Result 33920 states and 142749 transitions. [2022-11-22 01:59:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:59:47,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 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 [2022-11-22 01:59:47,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:47,978 INFO L225 Difference]: With dead ends: 33920 [2022-11-22 01:59:47,978 INFO L226 Difference]: Without dead ends: 33920 [2022-11-22 01:59:47,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:59:47,980 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 299 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:47,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 18 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:59:48,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33920 states. [2022-11-22 01:59:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33920 to 20734. [2022-11-22 01:59:48,903 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) [2022-11-22 01:59:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20734 states to 20734 states and 94390 transitions. [2022-11-22 01:59:49,041 INFO L78 Accepts]: Start accepts. Automaton has 20734 states and 94390 transitions. Word has length 10 [2022-11-22 01:59:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:49,042 INFO L495 AbstractCegarLoop]: Abstraction has 20734 states and 94390 transitions. [2022-11-22 01:59:49,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 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) [2022-11-22 01:59:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 20734 states and 94390 transitions. [2022-11-22 01:59:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:59:49,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:49,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:49,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:49,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:59:49,244 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1755627312, now seen corresponding path program 1 times [2022-11-22 01:59:49,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:49,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25287283] [2022-11-22 01:59:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:49,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:49,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:49,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25287283] [2022-11-22 01:59:49,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25287283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:49,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:49,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:59:49,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308115987] [2022-11-22 01:59:49,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:49,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:59:49,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:49,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:59:49,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:59:49,585 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) [2022-11-22 01:59:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:50,571 INFO L93 Difference]: Finished difference Result 28657 states and 126840 transitions. [2022-11-22 01:59:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:59:50,572 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 [2022-11-22 01:59:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:50,771 INFO L225 Difference]: With dead ends: 28657 [2022-11-22 01:59:50,771 INFO L226 Difference]: Without dead ends: 28609 [2022-11-22 01:59:50,771 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 [2022-11-22 01:59:50,772 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 200 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:50,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:59:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28609 states. [2022-11-22 01:59:51,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28609 to 22806. [2022-11-22 01:59:51,837 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) [2022-11-22 01:59:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22806 states to 22806 states and 104378 transitions. [2022-11-22 01:59:51,947 INFO L78 Accepts]: Start accepts. Automaton has 22806 states and 104378 transitions. Word has length 10 [2022-11-22 01:59:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:51,947 INFO L495 AbstractCegarLoop]: Abstraction has 22806 states and 104378 transitions. [2022-11-22 01:59:51,948 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) [2022-11-22 01:59:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 22806 states and 104378 transitions. [2022-11-22 01:59:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:59:51,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:51,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:51,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:59:51,951 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash -869612549, now seen corresponding path program 1 times [2022-11-22 01:59:51,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:51,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824628945] [2022-11-22 01:59:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:51,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:52,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824628945] [2022-11-22 01:59:52,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824628945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953767759] [2022-11-22 01:59:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:52,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:52,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:52,571 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:52,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:59:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:52,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:59:52,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:52,958 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 [2022-11-22 01:59:53,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:53,014 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 [2022-11-22 01:59:53,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:53,091 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 [2022-11-22 01:59:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:53,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:53,167 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_528 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_528) c_~f~0.base) (+ c_~f~0.offset (* c_~j~0 4))) 2147483649)) is different from false [2022-11-22 01:59:53,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:59:53,240 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 [2022-11-22 01:59:53,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:59:53,254 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 [2022-11-22 01:59:53,261 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 [2022-11-22 01:59:53,271 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 [2022-11-22 01:59:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:53,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953767759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:53,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1434611325] [2022-11-22 01:59:53,416 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) [2022-11-22 01:59:53,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:59:53,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-22 01:59:53,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765275929] [2022-11-22 01:59:53,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:53,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:59:53,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:53,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:59:53,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=144, Unknown=2, NotChecked=24, Total=210 [2022-11-22 01:59:53,420 INFO L87 Difference]: Start difference. First operand 22806 states and 104378 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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) [2022-11-22 01:59:55,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:55,182 INFO L93 Difference]: Finished difference Result 46109 states and 205674 transitions. [2022-11-22 01:59:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:59:55,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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 [2022-11-22 01:59:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:55,468 INFO L225 Difference]: With dead ends: 46109 [2022-11-22 01:59:55,468 INFO L226 Difference]: Without dead ends: 46109 [2022-11-22 01:59:55,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=236, Unknown=2, NotChecked=32, Total=342 [2022-11-22 01:59:55,469 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 362 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:55,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 47 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 602 Invalid, 0 Unknown, 136 Unchecked, 0.8s Time] [2022-11-22 01:59:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46109 states. [2022-11-22 01:59:56,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46109 to 25354. [2022-11-22 01:59:56,646 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) [2022-11-22 01:59:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25354 states to 25354 states and 121287 transitions. [2022-11-22 01:59:56,819 INFO L78 Accepts]: Start accepts. Automaton has 25354 states and 121287 transitions. Word has length 11 [2022-11-22 01:59:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:56,819 INFO L495 AbstractCegarLoop]: Abstraction has 25354 states and 121287 transitions. [2022-11-22 01:59:56,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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) [2022-11-22 01:59:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 25354 states and 121287 transitions. [2022-11-22 01:59:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:59:56,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:56,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:56,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:57,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:57,033 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:57,034 INFO L85 PathProgramCache]: Analyzing trace with hash -963164350, now seen corresponding path program 1 times [2022-11-22 01:59:57,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:57,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832948606] [2022-11-22 01:59:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:57,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:57,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:57,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832948606] [2022-11-22 01:59:57,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832948606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:57,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:57,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:59:57,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924699605] [2022-11-22 01:59:57,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:57,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:59:57,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:57,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:59:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:57,138 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) [2022-11-22 01:59:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:57,608 INFO L93 Difference]: Finished difference Result 24158 states and 112802 transitions. [2022-11-22 01:59:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:59:57,608 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 [2022-11-22 01:59:57,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:57,766 INFO L225 Difference]: With dead ends: 24158 [2022-11-22 01:59:57,766 INFO L226 Difference]: Without dead ends: 24054 [2022-11-22 01:59:57,766 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 [2022-11-22 01:59:57,767 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:57,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 8 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:59:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24054 states. [2022-11-22 01:59:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24054 to 22978. [2022-11-22 01:59:58,931 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) [2022-11-22 01:59:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22978 states to 22978 states and 108691 transitions. [2022-11-22 01:59:59,039 INFO L78 Accepts]: Start accepts. Automaton has 22978 states and 108691 transitions. Word has length 12 [2022-11-22 01:59:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:59,039 INFO L495 AbstractCegarLoop]: Abstraction has 22978 states and 108691 transitions. [2022-11-22 01:59:59,039 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) [2022-11-22 01:59:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 22978 states and 108691 transitions. [2022-11-22 01:59:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:59:59,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:59,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:59,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:59:59,041 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 01:59:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1188179028, now seen corresponding path program 1 times [2022-11-22 01:59:59,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:59,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083554944] [2022-11-22 01:59:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:59,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:59,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:59,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083554944] [2022-11-22 01:59:59,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083554944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:59,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865681264] [2022-11-22 01:59:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:59,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:59,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:59,779 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:59,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:00:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:00,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 02:00:00,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:00,169 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 [2022-11-22 02:00:00,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:00,250 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 [2022-11-22 02:00:00,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:00,318 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 [2022-11-22 02:00:00,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:00,386 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 [2022-11-22 02:00:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:00:00,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:00,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:00:00,589 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 [2022-11-22 02:00:00,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:00:00,605 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 [2022-11-22 02:00:00,618 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 [2022-11-22 02:00:00,629 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 [2022-11-22 02:00:00,642 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 [2022-11-22 02:00:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:00:01,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865681264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227666204] [2022-11-22 02:00:01,294 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) [2022-11-22 02:00:01,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:00:01,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-22 02:00:01,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122111017] [2022-11-22 02:00:01,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:00:01,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:00:01,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:01,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:00:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=237, Unknown=8, NotChecked=0, Total=306 [2022-11-22 02:00:01,298 INFO L87 Difference]: Start difference. First operand 22978 states and 108691 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-22 02:00:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:03,245 INFO L93 Difference]: Finished difference Result 41551 states and 183198 transitions. [2022-11-22 02:00:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:00:03,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 [2022-11-22 02:00:03,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:03,473 INFO L225 Difference]: With dead ends: 41551 [2022-11-22 02:00:03,473 INFO L226 Difference]: Without dead ends: 41551 [2022-11-22 02:00:03,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=357, Unknown=8, NotChecked=0, Total=462 [2022-11-22 02:00:03,474 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 277 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:03,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 88 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 02:00:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41551 states. [2022-11-22 02:00:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41551 to 22978. [2022-11-22 02:00:04,593 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) [2022-11-22 02:00:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22978 states to 22978 states and 108572 transitions. [2022-11-22 02:00:04,701 INFO L78 Accepts]: Start accepts. Automaton has 22978 states and 108572 transitions. Word has length 12 [2022-11-22 02:00:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:04,701 INFO L495 AbstractCegarLoop]: Abstraction has 22978 states and 108572 transitions. [2022-11-22 02:00:04,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-22 02:00:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 22978 states and 108572 transitions. [2022-11-22 02:00:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:00:04,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:04,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:00:04,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:04,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:00:04,904 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 02:00:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1821008871, now seen corresponding path program 1 times [2022-11-22 02:00:04,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:00:04,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958036606] [2022-11-22 02:00:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:04,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:00:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:00:05,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:05,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958036606] [2022-11-22 02:00:05,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958036606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:00:05,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094465339] [2022-11-22 02:00:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:05,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:05,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:00:05,154 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:00:05,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:00:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:05,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:00:05,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:00:05,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:00:05,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094465339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:05,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [642775270] [2022-11-22 02:00:05,602 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) [2022-11-22 02:00:05,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:00:05,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-22 02:00:05,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592389340] [2022-11-22 02:00:05,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:00:05,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:00:05,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:05,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:00:05,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:00:05,607 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) [2022-11-22 02:00:06,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:06,645 INFO L93 Difference]: Finished difference Result 48660 states and 223711 transitions. [2022-11-22 02:00:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:00:06,645 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 [2022-11-22 02:00:06,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:07,625 INFO L225 Difference]: With dead ends: 48660 [2022-11-22 02:00:07,626 INFO L226 Difference]: Without dead ends: 48564 [2022-11-22 02:00:07,626 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 [2022-11-22 02:00:07,627 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 389 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:07,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 57 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:00:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48564 states. [2022-11-22 02:00:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48564 to 30624. [2022-11-22 02:00:08,862 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) [2022-11-22 02:00:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30624 states to 30624 states and 149455 transitions. [2022-11-22 02:00:09,605 INFO L78 Accepts]: Start accepts. Automaton has 30624 states and 149455 transitions. Word has length 13 [2022-11-22 02:00:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:09,605 INFO L495 AbstractCegarLoop]: Abstraction has 30624 states and 149455 transitions. [2022-11-22 02:00:09,606 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) [2022-11-22 02:00:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 30624 states and 149455 transitions. [2022-11-22 02:00:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:00:09,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:09,607 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1] [2022-11-22 02:00:09,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:09,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:00:09,809 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 02:00:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:09,810 INFO L85 PathProgramCache]: Analyzing trace with hash 85362979, now seen corresponding path program 2 times [2022-11-22 02:00:09,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:00:09,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064061979] [2022-11-22 02:00:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:09,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:00:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:00:10,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:10,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064061979] [2022-11-22 02:00:10,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064061979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:00:10,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533279782] [2022-11-22 02:00:10,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:00:10,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:10,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:00:10,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:00:10,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:00:10,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 02:00:10,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:00:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:00:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-22 02:00:10,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:00:10,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533279782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:00:10,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:00:10,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2022-11-22 02:00:10,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189625757] [2022-11-22 02:00:10,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:00:10,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:00:10,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:00:10,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:00:10,353 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) [2022-11-22 02:00:10,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:10,809 INFO L93 Difference]: Finished difference Result 28529 states and 139275 transitions. [2022-11-22 02:00:10,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:00:10,810 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 [2022-11-22 02:00:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:11,014 INFO L225 Difference]: With dead ends: 28529 [2022-11-22 02:00:11,015 INFO L226 Difference]: Without dead ends: 28529 [2022-11-22 02:00:11,015 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 [2022-11-22 02:00:11,016 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 [2022-11-22 02:00:11,016 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] [2022-11-22 02:00:11,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28529 states. [2022-11-22 02:00:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28529 to 24831. [2022-11-22 02:00:12,100 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) [2022-11-22 02:00:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24831 states to 24831 states and 119815 transitions. [2022-11-22 02:00:12,220 INFO L78 Accepts]: Start accepts. Automaton has 24831 states and 119815 transitions. Word has length 13 [2022-11-22 02:00:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:12,221 INFO L495 AbstractCegarLoop]: Abstraction has 24831 states and 119815 transitions. [2022-11-22 02:00:12,221 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) [2022-11-22 02:00:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 24831 states and 119815 transitions. [2022-11-22 02:00:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:00:12,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:12,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:00:12,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-22 02:00:12,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 02:00:12,430 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 02:00:12,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1545314930, now seen corresponding path program 1 times [2022-11-22 02:00:12,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:00:12,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917636248] [2022-11-22 02:00:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:12,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:00:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:00:12,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:12,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917636248] [2022-11-22 02:00:12,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917636248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:00:12,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:00:12,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:00:12,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690903916] [2022-11-22 02:00:12,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:00:12,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:00:12,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:12,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:00:12,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:00:12,680 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) [2022-11-22 02:00:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:13,174 INFO L93 Difference]: Finished difference Result 25810 states and 122524 transitions. [2022-11-22 02:00:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:00:13,174 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 [2022-11-22 02:00:13,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:13,315 INFO L225 Difference]: With dead ends: 25810 [2022-11-22 02:00:13,315 INFO L226 Difference]: Without dead ends: 25649 [2022-11-22 02:00:13,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:00:13,316 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:13,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 3 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:00:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25649 states. [2022-11-22 02:00:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25649 to 24386. [2022-11-22 02:00:14,374 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) [2022-11-22 02:00:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24386 states to 24386 states and 117876 transitions. [2022-11-22 02:00:14,493 INFO L78 Accepts]: Start accepts. Automaton has 24386 states and 117876 transitions. Word has length 14 [2022-11-22 02:00:14,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:14,493 INFO L495 AbstractCegarLoop]: Abstraction has 24386 states and 117876 transitions. [2022-11-22 02:00:14,494 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) [2022-11-22 02:00:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 24386 states and 117876 transitions. [2022-11-22 02:00:14,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:00:14,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:14,495 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-11-22 02:00:14,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 02:00:14,496 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-22 02:00:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash -176401732, now seen corresponding path program 1 times [2022-11-22 02:00:14,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:00:14,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807974676] [2022-11-22 02:00:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:14,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:00:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:00:14,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:14,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807974676] [2022-11-22 02:00:14,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807974676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:00:14,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438668803] [2022-11-22 02:00:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:14,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:00:14,763 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:00:14,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0fedb0-5d27-4b17-8aa4-9fc069bc9895/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:00:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:15,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:00:15,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:00:15,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:00:15,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438668803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:15,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216546086] [2022-11-22 02:00:15,322 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) [2022-11-22 02:00:15,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:00:15,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-22 02:00:15,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339684134] [2022-11-22 02:00:15,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:00:15,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 02:00:15,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:15,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 02:00:15,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:00:15,325 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)