./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh --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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:26:27,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:26:27,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:26:27,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:26:27,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:26:27,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:26:27,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:26:27,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:26:27,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:26:27,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:26:27,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:26:27,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:26:27,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:26:27,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:26:27,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:26:27,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:26:27,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:26:27,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:26:27,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:26:27,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:26:27,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:26:27,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:26:27,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:26:27,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:26:27,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:26:27,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:26:27,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:26:27,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:26:27,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:26:27,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:26:27,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:26:27,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:26:27,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:26:27,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:26:27,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:26:27,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:26:27,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:26:27,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:26:27,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:26:27,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:26:27,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:26:27,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-12-14 12:26:27,416 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:26:27,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:26:27,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:26:27,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:26:27,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:26:27,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:26:27,417 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:26:27,417 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:26:27,417 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:26:27,418 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:26:27,418 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:26:27,418 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:26:27,418 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:26:27,418 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:26:27,418 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:26:27,419 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:26:27,419 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:26:27,419 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:26:27,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:26:27,420 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:26:27,420 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 12:26:27,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:26:27,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:26:27,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:26:27,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:26:27,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:26:27,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:26:27,421 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-14 12:26:27,421 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:26:27,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:26:27,421 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:26:27,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:26:27,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:26:27,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:26:27,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:26:27,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:26:27,422 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:26:27,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:26:27,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:26:27,423 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:26:27,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:26:27,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:26:27,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:26:27,423 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_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2022-12-14 12:26:27,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:26:27,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:26:27,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:26:27,605 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:26:27,606 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:26:27,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-12-14 12:26:30,162 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:26:30,320 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:26:30,320 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-12-14 12:26:30,326 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/data/911cf848c/1c8fb6c71da5436982c7af65818a4450/FLAG507c79c7a [2022-12-14 12:26:30,734 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/data/911cf848c/1c8fb6c71da5436982c7af65818a4450 [2022-12-14 12:26:30,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:26:30,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:26:30,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:26:30,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:26:30,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:26:30,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:30,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1b75e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30, skipping insertion in model container [2022-12-14 12:26:30,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:30,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:26:30,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:26:30,887 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:26:30,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:26:30,897 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:26:30,898 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:26:30,898 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:26:30,899 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:26:30,904 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_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-12-14 12:26:30,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:26:30,915 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:26:30,927 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:26:30,929 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:26:30,930 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:26:30,931 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:26:30,931 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:26:30,932 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:26:30,936 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_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-12-14 12:26:30,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:26:30,949 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:26:30,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30 WrapperNode [2022-12-14 12:26:30,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:26:30,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:26:30,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:26:30,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:26:30,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:30,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:30,983 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 152 [2022-12-14 12:26:30,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:26:30,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:26:30,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:26:30,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:26:30,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:30,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:30,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:30,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:31,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:31,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:31,007 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:31,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:31,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:26:31,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:26:31,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:26:31,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:26:31,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (1/1) ... [2022-12-14 12:26:31,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:26:31,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:31,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:26:31,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:26:31,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:26:31,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 12:26:31,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 12:26:31,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 12:26:31,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 12:26:31,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:26:31,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:26:31,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:26:31,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 12:26:31,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 12:26:31,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 12:26:31,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:26:31,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:26:31,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:26:31,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:26:31,073 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 12:26:31,149 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:26:31,150 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:26:31,374 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:26:31,452 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:26:31,452 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 12:26:31,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:26:31 BoogieIcfgContainer [2022-12-14 12:26:31,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:26:31,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:26:31,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:26:31,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:26:31,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:26:30" (1/3) ... [2022-12-14 12:26:31,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38dfbea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:26:31, skipping insertion in model container [2022-12-14 12:26:31,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:26:30" (2/3) ... [2022-12-14 12:26:31,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38dfbea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:26:31, skipping insertion in model container [2022-12-14 12:26:31,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:26:31" (3/3) ... [2022-12-14 12:26:31,460 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-12-14 12:26:31,467 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 12:26:31,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:26:31,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-14 12:26:31,475 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 12:26:31,526 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 12:26:31,553 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 12:26:31,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 144 transitions, 304 flow [2022-12-14 12:26:31,568 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 144 transitions, 304 flow [2022-12-14 12:26:31,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2022-12-14 12:26:31,612 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2022-12-14 12:26:31,613 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 12:26:31,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-12-14 12:26:31,618 INFO L119 LiptonReduction]: Number of co-enabled transitions 1116 [2022-12-14 12:26:36,280 INFO L134 LiptonReduction]: Checked pairs total: 1406 [2022-12-14 12:26:36,280 INFO L136 LiptonReduction]: Total number of compositions: 161 [2022-12-14 12:26:36,286 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2022-12-14 12:26:36,299 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 85 states have (on average 3.0470588235294116) internal successors, (259), 110 states have internal predecessors, (259), 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) [2022-12-14 12:26:36,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:26:36,316 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;@abfd3b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:26:36,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-14 12:26:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 85 states have (on average 3.0470588235294116) internal successors, (259), 110 states have internal predecessors, (259), 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) [2022-12-14 12:26:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:26:36,321 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:36,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:26:36,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:36,326 INFO L85 PathProgramCache]: Analyzing trace with hash 21660, now seen corresponding path program 1 times [2022-12-14 12:26:36,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:36,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054357681] [2022-12-14 12:26:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:36,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:36,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:36,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054357681] [2022-12-14 12:26:36,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054357681] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:36,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:26:36,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:26:36,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925712946] [2022-12-14 12:26:36,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:36,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:26:36,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:36,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:26:36,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:26:36,546 INFO L87 Difference]: Start difference. First operand has 111 states, 85 states have (on average 3.0470588235294116) internal successors, (259), 110 states have internal predecessors, (259), 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) [2022-12-14 12:26:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:36,617 INFO L93 Difference]: Finished difference Result 139 states and 321 transitions. [2022-12-14 12:26:36,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:26:36,619 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 [2022-12-14 12:26:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:36,626 INFO L225 Difference]: With dead ends: 139 [2022-12-14 12:26:36,626 INFO L226 Difference]: Without dead ends: 139 [2022-12-14 12:26:36,626 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 [2022-12-14 12:26:36,629 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 17 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:36,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:26:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-12-14 12:26:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 72. [2022-12-14 12:26:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 2.7796610169491527) internal successors, (164), 71 states have internal predecessors, (164), 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) [2022-12-14 12:26:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 164 transitions. [2022-12-14 12:26:36,662 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 164 transitions. Word has length 2 [2022-12-14 12:26:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:36,662 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 164 transitions. [2022-12-14 12:26:36,663 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) [2022-12-14 12:26:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 164 transitions. [2022-12-14 12:26:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 12:26:36,663 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:36,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 12:26:36,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:26:36,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:36,664 INFO L85 PathProgramCache]: Analyzing trace with hash 672505, now seen corresponding path program 1 times [2022-12-14 12:26:36,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:36,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737724511] [2022-12-14 12:26:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:36,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:36,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:36,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737724511] [2022-12-14 12:26:36,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737724511] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:36,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:26:36,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:26:36,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097397515] [2022-12-14 12:26:36,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:36,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:26:36,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:36,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:26:36,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:26:36,731 INFO L87 Difference]: Start difference. First operand 72 states and 164 transitions. Second operand has 3 states, 2 states have (on average 1.5) 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) [2022-12-14 12:26:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:36,759 INFO L93 Difference]: Finished difference Result 71 states and 163 transitions. [2022-12-14 12:26:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:26:36,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) 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 [2022-12-14 12:26:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:36,761 INFO L225 Difference]: With dead ends: 71 [2022-12-14 12:26:36,761 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 12:26:36,761 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 [2022-12-14 12:26:36,763 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:36,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:26:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 12:26:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-12-14 12:26:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 2.76271186440678) internal successors, (163), 70 states have internal predecessors, (163), 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) [2022-12-14 12:26:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 163 transitions. [2022-12-14 12:26:36,771 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 163 transitions. Word has length 3 [2022-12-14 12:26:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:36,771 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 163 transitions. [2022-12-14 12:26:36,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) 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) [2022-12-14 12:26:36,771 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 163 transitions. [2022-12-14 12:26:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 12:26:36,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:36,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 12:26:36,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:26:36,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:36,773 INFO L85 PathProgramCache]: Analyzing trace with hash 672506, now seen corresponding path program 1 times [2022-12-14 12:26:36,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:36,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801398671] [2022-12-14 12:26:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:36,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:36,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:36,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801398671] [2022-12-14 12:26:36,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801398671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:36,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982556772] [2022-12-14 12:26:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:36,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:36,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:36,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:36,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:26:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:36,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:26:36,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:36,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:26:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:36,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982556772] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:26:36,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [827471621] [2022-12-14 12:26:36,943 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:337) 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) [2022-12-14 12:26:36,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:26:36,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-14 12:26:36,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013427956] [2022-12-14 12:26:36,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:26:36,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:26:36,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:36,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:26:36,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:26:36,946 INFO L87 Difference]: Start difference. First operand 71 states and 163 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) [2022-12-14 12:26:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:37,090 INFO L93 Difference]: Finished difference Result 342 states and 797 transitions. [2022-12-14 12:26:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:26:37,091 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 [2022-12-14 12:26:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:37,093 INFO L225 Difference]: With dead ends: 342 [2022-12-14 12:26:37,094 INFO L226 Difference]: Without dead ends: 342 [2022-12-14 12:26:37,094 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 [2022-12-14 12:26:37,095 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 119 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:37,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 6 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:26:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-12-14 12:26:37,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 74. [2022-12-14 12:26:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 2.725806451612903) internal successors, (169), 73 states have internal predecessors, (169), 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) [2022-12-14 12:26:37,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 169 transitions. [2022-12-14 12:26:37,106 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 169 transitions. Word has length 3 [2022-12-14 12:26:37,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:37,106 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 169 transitions. [2022-12-14 12:26:37,106 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) [2022-12-14 12:26:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 169 transitions. [2022-12-14 12:26:37,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 12:26:37,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:37,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 12:26:37,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:26:37,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:37,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:37,311 INFO L85 PathProgramCache]: Analyzing trace with hash 20853879, now seen corresponding path program 1 times [2022-12-14 12:26:37,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:37,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125787120] [2022-12-14 12:26:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:37,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:37,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:37,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125787120] [2022-12-14 12:26:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125787120] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:37,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:26:37,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:26:37,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112956881] [2022-12-14 12:26:37,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:37,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:26:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:26:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:26:37,510 INFO L87 Difference]: Start difference. First operand 74 states and 169 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-12-14 12:26:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:37,553 INFO L93 Difference]: Finished difference Result 82 states and 177 transitions. [2022-12-14 12:26:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:26:37,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 4 [2022-12-14 12:26:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:37,555 INFO L225 Difference]: With dead ends: 82 [2022-12-14 12:26:37,555 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 12:26:37,555 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 [2022-12-14 12:26:37,556 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:37,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:26:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 12:26:37,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2022-12-14 12:26:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 2.732142857142857) internal successors, (153), 67 states have internal predecessors, (153), 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) [2022-12-14 12:26:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 153 transitions. [2022-12-14 12:26:37,562 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 153 transitions. Word has length 4 [2022-12-14 12:26:37,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:37,563 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 153 transitions. [2022-12-14 12:26:37,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-12-14 12:26:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 153 transitions. [2022-12-14 12:26:37,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 12:26:37,563 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:37,563 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 12:26:37,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:26:37,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:37,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1439202339, now seen corresponding path program 2 times [2022-12-14 12:26:37,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:37,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057878712] [2022-12-14 12:26:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:37,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:37,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:37,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057878712] [2022-12-14 12:26:37,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057878712] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:37,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037951915] [2022-12-14 12:26:37,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:26:37,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:37,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:37,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:37,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:26:37,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 12:26:37,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:26:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:26:37,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:26:37,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:26:37,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037951915] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:37,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:26:37,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-14 12:26:37,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234477235] [2022-12-14 12:26:37,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:37,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:26:37,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:37,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:26:37,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:26:37,722 INFO L87 Difference]: Start difference. First operand 68 states and 153 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) [2022-12-14 12:26:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:37,746 INFO L93 Difference]: Finished difference Result 67 states and 152 transitions. [2022-12-14 12:26:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:26:37,747 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 [2022-12-14 12:26:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:37,747 INFO L225 Difference]: With dead ends: 67 [2022-12-14 12:26:37,748 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 12:26:37,748 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 [2022-12-14 12:26:37,749 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:37,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:26:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 12:26:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2022-12-14 12:26:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 2.769230769230769) internal successors, (144), 62 states have internal predecessors, (144), 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) [2022-12-14 12:26:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 144 transitions. [2022-12-14 12:26:37,754 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 144 transitions. Word has length 6 [2022-12-14 12:26:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:37,754 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 144 transitions. [2022-12-14 12:26:37,754 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) [2022-12-14 12:26:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 144 transitions. [2022-12-14 12:26:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:26:37,755 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:37,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:26:37,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:26:37,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:37,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1511033600, now seen corresponding path program 1 times [2022-12-14 12:26:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:37,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317797573] [2022-12-14 12:26:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:38,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:38,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317797573] [2022-12-14 12:26:38,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317797573] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:38,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:26:38,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:26:38,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524589448] [2022-12-14 12:26:38,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:38,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:26:38,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:38,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:26:38,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:26:38,144 INFO L87 Difference]: Start difference. First operand 63 states and 144 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-12-14 12:26:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:38,201 INFO L93 Difference]: Finished difference Result 81 states and 171 transitions. [2022-12-14 12:26:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:26:38,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2022-12-14 12:26:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:38,202 INFO L225 Difference]: With dead ends: 81 [2022-12-14 12:26:38,202 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 12:26:38,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:26:38,204 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 13 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:38,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:26:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 12:26:38,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-12-14 12:26:38,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 63 states have internal predecessors, (145), 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) [2022-12-14 12:26:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 145 transitions. [2022-12-14 12:26:38,210 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 145 transitions. Word has length 7 [2022-12-14 12:26:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:38,210 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 145 transitions. [2022-12-14 12:26:38,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-12-14 12:26:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 145 transitions. [2022-12-14 12:26:38,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 12:26:38,211 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:38,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:26:38,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:26:38,211 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 60618947, now seen corresponding path program 1 times [2022-12-14 12:26:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:38,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244718541] [2022-12-14 12:26:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:38,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:38,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244718541] [2022-12-14 12:26:38,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244718541] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:38,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558571412] [2022-12-14 12:26:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:38,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:38,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:38,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:38,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:26:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:38,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:26:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:26:38,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:26:38,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558571412] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:38,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:26:38,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-14 12:26:38,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023358786] [2022-12-14 12:26:38,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:38,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:26:38,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:26:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:26:38,393 INFO L87 Difference]: Start difference. First operand 64 states and 145 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-12-14 12:26:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:38,417 INFO L93 Difference]: Finished difference Result 32 states and 67 transitions. [2022-12-14 12:26:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:26:38,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 8 [2022-12-14 12:26:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:38,418 INFO L225 Difference]: With dead ends: 32 [2022-12-14 12:26:38,418 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 12:26:38,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:26:38,419 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:38,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:26:38,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 12:26:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 12:26:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 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) [2022-12-14 12:26:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 43 transitions. [2022-12-14 12:26:38,422 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 43 transitions. Word has length 8 [2022-12-14 12:26:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:38,422 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 43 transitions. [2022-12-14 12:26:38,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-12-14 12:26:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 43 transitions. [2022-12-14 12:26:38,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:26:38,423 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:38,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:26:38,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:26:38,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:38,623 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:38,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:38,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1879188032, now seen corresponding path program 1 times [2022-12-14 12:26:38,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:38,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479045222] [2022-12-14 12:26:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:38,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:39,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479045222] [2022-12-14 12:26:39,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479045222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646961487] [2022-12-14 12:26:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:39,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:39,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:39,100 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:39,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:26:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:39,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 12:26:39,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:39,257 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 15 treesize of output 11 [2022-12-14 12:26:39,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:39,340 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 20 treesize of output 22 [2022-12-14 12:26:39,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:39,414 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 20 treesize of output 22 [2022-12-14 12:26:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:39,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:26:39,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:39,718 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 [2022-12-14 12:26:39,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:39,730 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 183 treesize of output 171 [2022-12-14 12:26:39,737 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 154 treesize of output 142 [2022-12-14 12:26:39,744 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 142 treesize of output 118 [2022-12-14 12:26:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:39,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646961487] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:26:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1341633910] [2022-12-14 12:26:39,847 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:337) 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) [2022-12-14 12:26:39,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:26:39,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-14 12:26:39,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486137266] [2022-12-14 12:26:39,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:26:39,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 12:26:39,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:39,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 12:26:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=219, Unknown=1, NotChecked=0, Total=272 [2022-12-14 12:26:39,849 INFO L87 Difference]: Start difference. First operand 22 states and 43 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2022-12-14 12:26:40,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:40,374 INFO L93 Difference]: Finished difference Result 50 states and 99 transitions. [2022-12-14 12:26:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:26:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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 9 [2022-12-14 12:26:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:40,374 INFO L225 Difference]: With dead ends: 50 [2022-12-14 12:26:40,375 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 12:26:40,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=333, Unknown=1, NotChecked=0, Total=420 [2022-12-14 12:26:40,375 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 41 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:40,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 13 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 163 Invalid, 3 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:26:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 12:26:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2022-12-14 12:26:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 2.121212121212121) internal successors, (70), 34 states have internal predecessors, (70), 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) [2022-12-14 12:26:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 70 transitions. [2022-12-14 12:26:40,377 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 70 transitions. Word has length 9 [2022-12-14 12:26:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:40,378 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 70 transitions. [2022-12-14 12:26:40,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2022-12-14 12:26:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 70 transitions. [2022-12-14 12:26:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:26:40,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:40,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:26:40,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:26:40,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 12:26:40,580 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:40,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1879188033, now seen corresponding path program 1 times [2022-12-14 12:26:40,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:40,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221629738] [2022-12-14 12:26:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:40,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:41,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:41,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221629738] [2022-12-14 12:26:41,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221629738] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:41,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839617710] [2022-12-14 12:26:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:41,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:41,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:41,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:41,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:26:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:41,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 12:26:41,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:41,130 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 15 treesize of output 11 [2022-12-14 12:26:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:41,179 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 18 treesize of output 20 [2022-12-14 12:26:41,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:41,230 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 18 treesize of output 20 [2022-12-14 12:26:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:41,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:26:43,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:43,481 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 31 treesize of output 32 [2022-12-14 12:26:43,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:43,489 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 173 treesize of output 161 [2022-12-14 12:26:43,494 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 146 treesize of output 122 [2022-12-14 12:26:43,499 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 67 treesize of output 55 [2022-12-14 12:26:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:43,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839617710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:26:43,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861895296] [2022-12-14 12:26:43,581 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:337) 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) [2022-12-14 12:26:43,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:26:43,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-14 12:26:43,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677032152] [2022-12-14 12:26:43,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:26:43,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 12:26:43,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:43,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 12:26:43,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2022-12-14 12:26:43,583 INFO L87 Difference]: Start difference. First operand 35 states and 70 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2022-12-14 12:26:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:44,381 INFO L93 Difference]: Finished difference Result 70 states and 145 transitions. [2022-12-14 12:26:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:26:44,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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 9 [2022-12-14 12:26:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:44,382 INFO L225 Difference]: With dead ends: 70 [2022-12-14 12:26:44,382 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 12:26:44,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=121, Invalid=478, Unknown=1, NotChecked=0, Total=600 [2022-12-14 12:26:44,383 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 49 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 23 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:44,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 12 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 223 Invalid, 5 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:26:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 12:26:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2022-12-14 12:26:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 49 states have internal predecessors, (107), 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) [2022-12-14 12:26:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 107 transitions. [2022-12-14 12:26:44,387 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 107 transitions. Word has length 9 [2022-12-14 12:26:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:44,387 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 107 transitions. [2022-12-14 12:26:44,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2022-12-14 12:26:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 107 transitions. [2022-12-14 12:26:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 12:26:44,388 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:44,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:26:44,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:26:44,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:44,590 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:44,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:44,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1874712446, now seen corresponding path program 1 times [2022-12-14 12:26:44,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:44,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573236409] [2022-12-14 12:26:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:44,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:44,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573236409] [2022-12-14 12:26:44,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573236409] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810629160] [2022-12-14 12:26:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:44,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:44,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:44,760 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:44,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:26:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:44,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:26:44,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:44,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 124 treesize of output 92 [2022-12-14 12:26:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:26:44,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:26:44,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810629160] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:44,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:26:44,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2022-12-14 12:26:44,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151878012] [2022-12-14 12:26:44,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:44,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:26:44,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:26:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:26:44,924 INFO L87 Difference]: Start difference. First operand 50 states and 107 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-12-14 12:26:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:44,961 INFO L93 Difference]: Finished difference Result 74 states and 161 transitions. [2022-12-14 12:26:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:26:44,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-12-14 12:26:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:44,963 INFO L225 Difference]: With dead ends: 74 [2022-12-14 12:26:44,963 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 12:26:44,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:26:44,963 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:44,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:26:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 12:26:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2022-12-14 12:26:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 59 states have internal predecessors, (130), 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) [2022-12-14 12:26:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 130 transitions. [2022-12-14 12:26:44,966 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 130 transitions. Word has length 10 [2022-12-14 12:26:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:44,966 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 130 transitions. [2022-12-14 12:26:44,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-12-14 12:26:44,967 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 130 transitions. [2022-12-14 12:26:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:26:44,967 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:44,967 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:26:44,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:26:45,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:45,168 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:45,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2071331488, now seen corresponding path program 2 times [2022-12-14 12:26:45,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:45,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523610211] [2022-12-14 12:26:45,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:45,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:45,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:45,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523610211] [2022-12-14 12:26:45,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523610211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:45,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331685779] [2022-12-14 12:26:45,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:26:45,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:45,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:45,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:45,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:26:45,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 12:26:45,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:26:45,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:26:45,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:26:46,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:26:46,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331685779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:46,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:26:46,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2022-12-14 12:26:46,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127565519] [2022-12-14 12:26:46,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:46,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:26:46,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:46,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:26:46,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:26:46,074 INFO L87 Difference]: Start difference. First operand 60 states and 130 transitions. Second operand has 4 states, 3 states have (on average 3.0) 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) [2022-12-14 12:26:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:46,108 INFO L93 Difference]: Finished difference Result 74 states and 165 transitions. [2022-12-14 12:26:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:26:46,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) 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 11 [2022-12-14 12:26:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:46,109 INFO L225 Difference]: With dead ends: 74 [2022-12-14 12:26:46,109 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 12:26:46,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:26:46,110 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:46,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:26:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 12:26:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-12-14 12:26:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 2.338235294117647) internal successors, (159), 69 states have internal predecessors, (159), 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) [2022-12-14 12:26:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 159 transitions. [2022-12-14 12:26:46,114 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 159 transitions. Word has length 11 [2022-12-14 12:26:46,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:46,114 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 159 transitions. [2022-12-14 12:26:46,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) 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) [2022-12-14 12:26:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 159 transitions. [2022-12-14 12:26:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:26:46,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:46,115 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:26:46,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:26:46,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 12:26:46,315 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:46,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:46,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2071331489, now seen corresponding path program 2 times [2022-12-14 12:26:46,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:46,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058747417] [2022-12-14 12:26:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:46,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:47,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:47,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058747417] [2022-12-14 12:26:47,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058747417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:47,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737402167] [2022-12-14 12:26:47,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:26:47,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:47,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:47,432 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:47,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:26:47,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 12:26:47,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:26:47,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:26:47,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:26:47,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:26:47,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737402167] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:47,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:26:47,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2022-12-14 12:26:47,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230930321] [2022-12-14 12:26:47,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:47,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:26:47,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:47,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:26:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:26:47,592 INFO L87 Difference]: Start difference. First operand 70 states and 159 transitions. Second operand has 5 states, 4 states have (on average 2.25) 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) [2022-12-14 12:26:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:47,622 INFO L93 Difference]: Finished difference Result 70 states and 151 transitions. [2022-12-14 12:26:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:26:47,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) 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 11 [2022-12-14 12:26:47,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:47,623 INFO L225 Difference]: With dead ends: 70 [2022-12-14 12:26:47,623 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 12:26:47,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:26:47,623 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:47,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:26:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 12:26:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2022-12-14 12:26:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 53 states have internal predecessors, (122), 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) [2022-12-14 12:26:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 122 transitions. [2022-12-14 12:26:47,626 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 122 transitions. Word has length 11 [2022-12-14 12:26:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:47,626 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 122 transitions. [2022-12-14 12:26:47,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) 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) [2022-12-14 12:26:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 122 transitions. [2022-12-14 12:26:47,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:26:47,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:47,627 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:26:47,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:26:47,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 12:26:47,829 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:47,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:47,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2013458512, now seen corresponding path program 2 times [2022-12-14 12:26:47,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:47,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837770955] [2022-12-14 12:26:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:47,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:48,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:48,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837770955] [2022-12-14 12:26:48,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837770955] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:48,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583121441] [2022-12-14 12:26:48,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:26:48,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:48,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:48,018 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:48,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:26:48,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:26:48,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:26:48,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:26:48,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:48,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 124 treesize of output 92 [2022-12-14 12:26:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:48,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:26:48,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 136 treesize of output 104 [2022-12-14 12:26:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:48,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583121441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:26:48,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921594352] [2022-12-14 12:26:48,303 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:337) 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) [2022-12-14 12:26:48,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:26:48,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-14 12:26:48,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885503634] [2022-12-14 12:26:48,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:26:48,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 12:26:48,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:48,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 12:26:48,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:26:48,304 INFO L87 Difference]: Start difference. First operand 54 states and 122 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 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) [2022-12-14 12:26:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:48,384 INFO L93 Difference]: Finished difference Result 46 states and 92 transitions. [2022-12-14 12:26:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:26:48,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 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 [2022-12-14 12:26:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:48,385 INFO L225 Difference]: With dead ends: 46 [2022-12-14 12:26:48,385 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 12:26:48,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:26:48,385 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:48,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:26:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 12:26:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-14 12:26:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 34 states have internal predecessors, (78), 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) [2022-12-14 12:26:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 78 transitions. [2022-12-14 12:26:48,388 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 78 transitions. Word has length 11 [2022-12-14 12:26:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:48,388 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 78 transitions. [2022-12-14 12:26:48,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 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) [2022-12-14 12:26:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 78 transitions. [2022-12-14 12:26:48,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:26:48,389 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:48,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:26:48,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:26:48,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:48,590 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:26:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2012404371, now seen corresponding path program 3 times [2022-12-14 12:26:48,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:48,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025683999] [2022-12-14 12:26:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:48,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:49,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:49,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025683999] [2022-12-14 12:26:49,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025683999] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:49,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003615631] [2022-12-14 12:26:49,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:26:49,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:49,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:49,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:49,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:26:49,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:26:49,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:26:49,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 12:26:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:49,605 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 13 treesize of output 9 [2022-12-14 12:26:49,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:49,647 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 18 treesize of output 20 [2022-12-14 12:26:49,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:49,698 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 18 treesize of output 20 [2022-12-14 12:26:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:49,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:26:50,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:50,550 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 124 treesize of output 88 [2022-12-14 12:26:50,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:50,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 583 treesize of output 611 [2022-12-14 12:26:50,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:50,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 502 treesize of output 450 [2022-12-14 12:26:50,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:50,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 398 [2022-12-14 12:26:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:55,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003615631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:26:55,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57469367] [2022-12-14 12:26:55,162 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 12:26:55,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:26:55,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-14 12:26:55,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817784435] [2022-12-14 12:26:55,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:26:55,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 12:26:55,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:55,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 12:26:55,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=647, Unknown=2, NotChecked=0, Total=812 [2022-12-14 12:26:55,164 INFO L87 Difference]: Start difference. First operand 35 states and 78 transitions. Second operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:26:58,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 12:27:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:27:02,272 INFO L93 Difference]: Finished difference Result 175 states and 384 transitions. [2022-12-14 12:27:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 12:27:02,272 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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 [2022-12-14 12:27:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:27:02,273 INFO L225 Difference]: With dead ends: 175 [2022-12-14 12:27:02,273 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 12:27:02,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=726, Invalid=2351, Unknown=3, NotChecked=0, Total=3080 [2022-12-14 12:27:02,274 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 150 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 65 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:27:02,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 14 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 520 Invalid, 8 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 12:27:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 12:27:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 93. [2022-12-14 12:27:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 91 states have (on average 2.5714285714285716) internal successors, (234), 92 states have internal predecessors, (234), 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) [2022-12-14 12:27:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 234 transitions. [2022-12-14 12:27:02,277 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 234 transitions. Word has length 12 [2022-12-14 12:27:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:27:02,277 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 234 transitions. [2022-12-14 12:27:02,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2022-12-14 12:27:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 234 transitions. [2022-12-14 12:27:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:27:02,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:27:02,278 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:27:02,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:27:02,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:02,479 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:27:02,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:27:02,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2012404372, now seen corresponding path program 1 times [2022-12-14 12:27:02,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:27:02,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473886245] [2022-12-14 12:27:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:27:02,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:27:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:27:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:03,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:27:03,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473886245] [2022-12-14 12:27:03,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473886245] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:27:03,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120027082] [2022-12-14 12:27:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:27:03,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:03,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:27:03,181 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:27:03,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:27:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:27:03,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 12:27:03,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:27:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:03,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:27:03,946 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-14 12:27:03,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 198 [2022-12-14 12:27:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:04,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120027082] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:27:04,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2006135681] [2022-12-14 12:27:04,698 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:337) 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) [2022-12-14 12:27:04,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:27:04,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2022-12-14 12:27:04,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594275915] [2022-12-14 12:27:04,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:27:04,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 12:27:04,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:27:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 12:27:04,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-12-14 12:27:04,700 INFO L87 Difference]: Start difference. First operand 93 states and 234 transitions. Second operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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) [2022-12-14 12:27:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:27:06,133 INFO L93 Difference]: Finished difference Result 161 states and 392 transitions. [2022-12-14 12:27:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 12:27:06,133 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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 [2022-12-14 12:27:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:27:06,135 INFO L225 Difference]: With dead ends: 161 [2022-12-14 12:27:06,135 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 12:27:06,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 12:27:06,136 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 75 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:27:06,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 12 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:27:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 12:27:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 117. [2022-12-14 12:27:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 115 states have (on average 2.6956521739130435) internal successors, (310), 116 states have internal predecessors, (310), 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) [2022-12-14 12:27:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 310 transitions. [2022-12-14 12:27:06,139 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 310 transitions. Word has length 12 [2022-12-14 12:27:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:27:06,139 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 310 transitions. [2022-12-14 12:27:06,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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) [2022-12-14 12:27:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 310 transitions. [2022-12-14 12:27:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:27:06,140 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:27:06,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:27:06,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:27:06,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 12:27:06,340 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:27:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:27:06,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2012449011, now seen corresponding path program 4 times [2022-12-14 12:27:06,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:27:06,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347228926] [2022-12-14 12:27:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:27:06,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:27:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:27:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:07,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:27:07,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347228926] [2022-12-14 12:27:07,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347228926] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:27:07,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942026690] [2022-12-14 12:27:07,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:27:07,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:07,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:27:07,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:27:07,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:27:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:27:07,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 12:27:07,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:27:07,285 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 13 treesize of output 9 [2022-12-14 12:27:07,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:27:07,346 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 18 treesize of output 20 [2022-12-14 12:27:07,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:27:07,403 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 18 treesize of output 20 [2022-12-14 12:27:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:07,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:27:08,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:08,377 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 124 treesize of output 88 [2022-12-14 12:27:08,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:08,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 583 treesize of output 611 [2022-12-14 12:27:08,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:08,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 401 treesize of output 401 [2022-12-14 12:27:08,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:08,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 450 treesize of output 398 [2022-12-14 12:27:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:12,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942026690] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:27:12,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1399254639] [2022-12-14 12:27:12,749 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:337) 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) [2022-12-14 12:27:12,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:27:12,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-14 12:27:12,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857368037] [2022-12-14 12:27:12,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:27:12,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 12:27:12,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:27:12,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 12:27:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=654, Unknown=2, NotChecked=0, Total=812 [2022-12-14 12:27:12,750 INFO L87 Difference]: Start difference. First operand 117 states and 310 transitions. Second operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2022-12-14 12:27:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:27:17,199 INFO L93 Difference]: Finished difference Result 167 states and 402 transitions. [2022-12-14 12:27:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 12:27:17,199 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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 [2022-12-14 12:27:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:27:17,200 INFO L225 Difference]: With dead ends: 167 [2022-12-14 12:27:17,200 INFO L226 Difference]: Without dead ends: 167 [2022-12-14 12:27:17,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=568, Invalid=1781, Unknown=3, NotChecked=0, Total=2352 [2022-12-14 12:27:17,200 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 117 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 40 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:27:17,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 15 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 414 Invalid, 10 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:27:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-12-14 12:27:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 123. [2022-12-14 12:27:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 2.7024793388429753) internal successors, (327), 122 states have internal predecessors, (327), 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) [2022-12-14 12:27:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 327 transitions. [2022-12-14 12:27:17,204 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 327 transitions. Word has length 12 [2022-12-14 12:27:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:27:17,204 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 327 transitions. [2022-12-14 12:27:17,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2022-12-14 12:27:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 327 transitions. [2022-12-14 12:27:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:27:17,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:27:17,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:27:17,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 12:27:17,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 12:27:17,405 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:27:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:27:17,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2012449012, now seen corresponding path program 2 times [2022-12-14 12:27:17,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:27:17,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824159460] [2022-12-14 12:27:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:27:17,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:27:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:27:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:18,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:27:18,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824159460] [2022-12-14 12:27:18,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824159460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:27:18,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622766188] [2022-12-14 12:27:18,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:27:18,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:18,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:27:18,053 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:27:18,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:27:18,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:27:18,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:27:18,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 12:27:18,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:27:18,236 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 13 treesize of output 9 [2022-12-14 12:27:18,287 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 6 treesize of output 5 [2022-12-14 12:27:18,342 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 6 treesize of output 5 [2022-12-14 12:27:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:18,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:27:19,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:19,712 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 121 treesize of output 85 [2022-12-14 12:27:19,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:19,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 276 [2022-12-14 12:27:19,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:19,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 224 [2022-12-14 12:27:19,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:19,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 171 [2022-12-14 12:27:21,158 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 12:27:21,158 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 123 treesize of output 1 [2022-12-14 12:27:21,172 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 12:27:21,172 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 125 treesize of output 1 [2022-12-14 12:27:21,183 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 12:27:21,183 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 123 treesize of output 1 [2022-12-14 12:27:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:21,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622766188] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:27:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76923794] [2022-12-14 12:27:21,307 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:337) 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) [2022-12-14 12:27:21,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:27:21,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2022-12-14 12:27:21,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694066674] [2022-12-14 12:27:21,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:27:21,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 12:27:21,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:27:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 12:27:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=491, Unknown=3, NotChecked=0, Total=600 [2022-12-14 12:27:21,309 INFO L87 Difference]: Start difference. First operand 123 states and 327 transitions. Second operand has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 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) [2022-12-14 12:27:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:27:23,036 INFO L93 Difference]: Finished difference Result 156 states and 387 transitions. [2022-12-14 12:27:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 12:27:23,036 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 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 [2022-12-14 12:27:23,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:27:23,037 INFO L225 Difference]: With dead ends: 156 [2022-12-14 12:27:23,037 INFO L226 Difference]: Without dead ends: 156 [2022-12-14 12:27:23,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=249, Invalid=1008, Unknown=3, NotChecked=0, Total=1260 [2022-12-14 12:27:23,038 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 26 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:27:23,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 15 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 383 Invalid, 11 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:27:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-12-14 12:27:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 123. [2022-12-14 12:27:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 2.6198347107438016) internal successors, (317), 122 states have internal predecessors, (317), 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) [2022-12-14 12:27:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 317 transitions. [2022-12-14 12:27:23,040 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 317 transitions. Word has length 12 [2022-12-14 12:27:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:27:23,041 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 317 transitions. [2022-12-14 12:27:23,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 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) [2022-12-14 12:27:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 317 transitions. [2022-12-14 12:27:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:27:23,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:27:23,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:27:23,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 12:27:23,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:23,242 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:27:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:27:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2038589393, now seen corresponding path program 5 times [2022-12-14 12:27:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:27:23,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236727437] [2022-12-14 12:27:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:27:23,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:27:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:27:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:23,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:27:23,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236727437] [2022-12-14 12:27:23,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236727437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:27:23,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552536166] [2022-12-14 12:27:23,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:27:23,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:23,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:27:23,399 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:27:23,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 12:27:23,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:27:23,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:27:23,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:27:23,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:27:23,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:23,602 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 170 treesize of output 120 [2022-12-14 12:27:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:27:23,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:27:23,828 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 12:27:23,828 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 190 treesize of output 142 [2022-12-14 12:27:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:27:23,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552536166] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:27:23,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167964137] [2022-12-14 12:27:23,893 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:337) 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) [2022-12-14 12:27:23,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:27:23,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2022-12-14 12:27:23,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312609320] [2022-12-14 12:27:23,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:27:23,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 12:27:23,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:27:23,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 12:27:23,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:27:23,895 INFO L87 Difference]: Start difference. First operand 123 states and 317 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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) [2022-12-14 12:27:24,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:27:24,224 INFO L93 Difference]: Finished difference Result 227 states and 551 transitions. [2022-12-14 12:27:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 12:27:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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 [2022-12-14 12:27:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:27:24,225 INFO L225 Difference]: With dead ends: 227 [2022-12-14 12:27:24,225 INFO L226 Difference]: Without dead ends: 205 [2022-12-14 12:27:24,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2022-12-14 12:27:24,226 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 94 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:27:24,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 6 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:27:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-12-14 12:27:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 137. [2022-12-14 12:27:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 2.5185185185185186) internal successors, (340), 136 states have internal predecessors, (340), 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) [2022-12-14 12:27:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 340 transitions. [2022-12-14 12:27:24,229 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 340 transitions. Word has length 13 [2022-12-14 12:27:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:27:24,230 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 340 transitions. [2022-12-14 12:27:24,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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) [2022-12-14 12:27:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 340 transitions. [2022-12-14 12:27:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 12:27:24,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:27:24,230 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:27:24,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 12:27:24,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 12:27:24,432 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:27:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:27:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1228240451, now seen corresponding path program 6 times [2022-12-14 12:27:24,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:27:24,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705018493] [2022-12-14 12:27:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:27:24,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:27:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:27:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:27:24,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:27:24,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705018493] [2022-12-14 12:27:24,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705018493] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:27:24,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726411402] [2022-12-14 12:27:24,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:27:24,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:24,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:27:24,576 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:27:24,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 12:27:24,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:27:24,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:27:24,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:27:24,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:27:24,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:24,834 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 170 treesize of output 120 [2022-12-14 12:27:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:27:24,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:27:25,028 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 12:27:25,028 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 198 treesize of output 150 [2022-12-14 12:27:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:27:25,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726411402] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:27:25,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [835264149] [2022-12-14 12:27:25,114 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:337) 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) [2022-12-14 12:27:25,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:27:25,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-14 12:27:25,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950476124] [2022-12-14 12:27:25,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:27:25,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 12:27:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:27:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 12:27:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:27:25,116 INFO L87 Difference]: Start difference. First operand 137 states and 340 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2022-12-14 12:27:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:27:25,292 INFO L93 Difference]: Finished difference Result 109 states and 258 transitions. [2022-12-14 12:27:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:27:25,292 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 14 [2022-12-14 12:27:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:27:25,293 INFO L225 Difference]: With dead ends: 109 [2022-12-14 12:27:25,293 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 12:27:25,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-12-14 12:27:25,294 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 15 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:27:25,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 11 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:27:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 12:27:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 12:27:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 2.6627906976744184) internal successors, (229), 87 states have internal predecessors, (229), 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) [2022-12-14 12:27:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2022-12-14 12:27:25,297 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 14 [2022-12-14 12:27:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:27:25,297 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2022-12-14 12:27:25,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2022-12-14 12:27:25,297 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2022-12-14 12:27:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:27:25,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:27:25,297 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:27:25,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 12:27:25,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:25,499 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:27:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:27:25,500 INFO L85 PathProgramCache]: Analyzing trace with hash -153802048, now seen corresponding path program 7 times [2022-12-14 12:27:25,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:27:25,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040253579] [2022-12-14 12:27:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:27:25,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:27:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:27:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:26,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:27:26,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040253579] [2022-12-14 12:27:26,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040253579] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:27:26,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308651254] [2022-12-14 12:27:26,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:27:26,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:26,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:27:26,263 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:27:26,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 12:27:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:27:26,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 12:27:26,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:27:26,429 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 15 treesize of output 11 [2022-12-14 12:27:26,504 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-14 12:27:26,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 36 [2022-12-14 12:27:26,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:27:26,582 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 33 treesize of output 35 [2022-12-14 12:27:26,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:27:26,671 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 33 treesize of output 35 [2022-12-14 12:27:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:27,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:27:29,113 INFO L321 Elim1Store]: treesize reduction 40, result has 62.6 percent of original size [2022-12-14 12:27:29,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 461 treesize of output 309 [2022-12-14 12:27:29,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:29,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 787 treesize of output 927 [2022-12-14 12:27:29,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:29,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 713 treesize of output 754 [2022-12-14 12:27:29,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:29,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 633 treesize of output 714 [2022-12-14 12:27:29,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:29,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 613 treesize of output 767 [2022-12-14 12:27:29,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:29,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 553 treesize of output 594 [2022-12-14 12:27:29,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:29,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 473 treesize of output 554 [2022-12-14 12:28:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:28:40,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308651254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:28:40,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1496739038] [2022-12-14 12:28:40,145 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:337) 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 12:28:40,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:28:40,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2022-12-14 12:28:40,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137798620] [2022-12-14 12:28:40,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:28:40,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 12:28:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:28:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 12:28:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1092, Unknown=7, NotChecked=0, Total=1332 [2022-12-14 12:28:40,146 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:28:44,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 12:28:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:28:50,191 INFO L93 Difference]: Finished difference Result 388 states and 998 transitions. [2022-12-14 12:28:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 12:28:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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 15 [2022-12-14 12:28:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:28:50,193 INFO L225 Difference]: With dead ends: 388 [2022-12-14 12:28:50,193 INFO L226 Difference]: Without dead ends: 384 [2022-12-14 12:28:50,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1254, Invalid=4730, Unknown=22, NotChecked=0, Total=6006 [2022-12-14 12:28:50,195 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 192 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 76 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:28:50,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 21 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1102 Invalid, 18 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 12:28:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-12-14 12:28:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 214. [2022-12-14 12:28:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 212 states have (on average 3.1226415094339623) internal successors, (662), 213 states have internal predecessors, (662), 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) [2022-12-14 12:28:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 662 transitions. [2022-12-14 12:28:50,203 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 662 transitions. Word has length 15 [2022-12-14 12:28:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:28:50,203 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 662 transitions. [2022-12-14 12:28:50,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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) [2022-12-14 12:28:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 662 transitions. [2022-12-14 12:28:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:28:50,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:28:50,204 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:28:50,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 12:28:50,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:28:50,405 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:28:50,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:28:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash -153802047, now seen corresponding path program 3 times [2022-12-14 12:28:50,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:28:50,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127587731] [2022-12-14 12:28:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:28:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:28:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:28:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:28:51,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:28:51,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127587731] [2022-12-14 12:28:51,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127587731] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:28:51,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178249165] [2022-12-14 12:28:51,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:28:51,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:28:51,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:28:51,595 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:28:51,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 12:28:51,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:28:51,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:28:51,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 12:28:51,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:28:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:28:52,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:28:52,893 INFO L321 Elim1Store]: treesize reduction 76, result has 48.3 percent of original size [2022-12-14 12:28:52,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 293 treesize of output 253 [2022-12-14 12:28:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:28:53,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178249165] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:28:53,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153925719] [2022-12-14 12:28:53,744 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:337) 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) [2022-12-14 12:28:53,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:28:53,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 33 [2022-12-14 12:28:53,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863336662] [2022-12-14 12:28:53,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:28:53,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 12:28:53,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:28:53,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 12:28:53,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 12:28:53,745 INFO L87 Difference]: Start difference. First operand 214 states and 662 transitions. Second operand has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 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) [2022-12-14 12:28:57,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:28:57,858 INFO L93 Difference]: Finished difference Result 658 states and 1994 transitions. [2022-12-14 12:28:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 12:28:57,858 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 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 15 [2022-12-14 12:28:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:28:57,860 INFO L225 Difference]: With dead ends: 658 [2022-12-14 12:28:57,861 INFO L226 Difference]: Without dead ends: 640 [2022-12-14 12:28:57,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=955, Invalid=3737, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 12:28:57,862 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 158 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:28:57,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 9 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 12:28:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-12-14 12:28:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 396. [2022-12-14 12:28:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 394 states have (on average 3.6725888324873095) internal successors, (1447), 395 states have internal predecessors, (1447), 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) [2022-12-14 12:28:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1447 transitions. [2022-12-14 12:28:57,872 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1447 transitions. Word has length 15 [2022-12-14 12:28:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:28:57,872 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 1447 transitions. [2022-12-14 12:28:57,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 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) [2022-12-14 12:28:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1447 transitions. [2022-12-14 12:28:57,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:28:57,873 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:28:57,873 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:28:57,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 12:28:58,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 12:28:58,074 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:28:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:28:58,075 INFO L85 PathProgramCache]: Analyzing trace with hash -153757408, now seen corresponding path program 8 times [2022-12-14 12:28:58,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:28:58,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023443305] [2022-12-14 12:28:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:28:58,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:28:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:28:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:28:58,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:28:58,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023443305] [2022-12-14 12:28:58,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023443305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:28:58,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450522566] [2022-12-14 12:28:58,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:28:58,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:28:58,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:28:58,646 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:28:58,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 12:28:58,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:28:58,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:28:58,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 12:28:58,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:28:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:28:59,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:28:59,481 INFO L321 Elim1Store]: treesize reduction 26, result has 62.3 percent of original size [2022-12-14 12:28:59,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 227 treesize of output 194 [2022-12-14 12:28:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:28:59,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450522566] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:28:59,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241634367] [2022-12-14 12:28:59,810 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:337) 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) [2022-12-14 12:28:59,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:28:59,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 25 [2022-12-14 12:28:59,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523918763] [2022-12-14 12:28:59,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:28:59,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 12:28:59,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:28:59,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 12:28:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-12-14 12:28:59,812 INFO L87 Difference]: Start difference. First operand 396 states and 1447 transitions. Second operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 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) [2022-12-14 12:29:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:29:04,729 INFO L93 Difference]: Finished difference Result 1090 states and 3404 transitions. [2022-12-14 12:29:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 12:29:04,729 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 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 15 [2022-12-14 12:29:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:29:04,734 INFO L225 Difference]: With dead ends: 1090 [2022-12-14 12:29:04,734 INFO L226 Difference]: Without dead ends: 1090 [2022-12-14 12:29:04,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=730, Invalid=5750, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 12:29:04,735 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 242 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:29:04,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 9 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 12:29:04,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-12-14 12:29:04,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 598. [2022-12-14 12:29:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 596 states have (on average 3.8087248322147653) internal successors, (2270), 597 states have internal predecessors, (2270), 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) [2022-12-14 12:29:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2270 transitions. [2022-12-14 12:29:04,754 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2270 transitions. Word has length 15 [2022-12-14 12:29:04,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:29:04,755 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 2270 transitions. [2022-12-14 12:29:04,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 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) [2022-12-14 12:29:04,755 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2270 transitions. [2022-12-14 12:29:04,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:29:04,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:04,756 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:29:04,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 12:29:04,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 12:29:04,957 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-14 12:29:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:04,958 INFO L85 PathProgramCache]: Analyzing trace with hash -153757407, now seen corresponding path program 4 times [2022-12-14 12:29:04,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:04,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348476128] [2022-12-14 12:29:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:04,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:29:05,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:05,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348476128] [2022-12-14 12:29:05,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348476128] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:05,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601548012] [2022-12-14 12:29:05,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:29:05,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:05,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:05,956 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:05,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e7f40b4-9b03-46f0-8581-71cbc32e4d91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 12:29:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:06,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 12:29:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:06,150 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 13 treesize of output 9 [2022-12-14 12:29:06,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:06,215 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 16 treesize of output 18 [2022-12-14 12:29:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:06,264 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 16 treesize of output 18 [2022-12-14 12:29:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:29:07,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:29:09,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:09,854 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 1525 treesize of output 962 [2022-12-14 12:29:10,038 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:10,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 5225 treesize of output 4741 [2022-12-14 12:29:10,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:10,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 4537 treesize of output 4578 [2022-12-14 12:29:10,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:10,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 4457 treesize of output 4418 [2022-12-14 12:29:10,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:10,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 4297 treesize of output 4338 [2022-12-14 12:29:10,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:10,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 4217 treesize of output 4298 [2022-12-14 12:29:11,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:11,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 4177 treesize of output 4218 [2022-12-14 12:29:11,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:11,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 4097 treesize of output 4058 [2022-12-14 12:29:11,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:11,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3937 treesize of output 3978 [2022-12-14 12:29:11,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:11,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3857 treesize of output 3938 [2022-12-14 12:29:12,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:12,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3817 treesize of output 3858 [2022-12-14 12:29:12,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:12,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3737 treesize of output 3818 [2022-12-14 12:29:12,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:12,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3697 treesize of output 3738 [2022-12-14 12:29:13,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:13,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3617 treesize of output 3578 [2022-12-14 12:29:13,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:13,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3457 treesize of output 3498 [2022-12-14 12:29:14,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:14,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3377 treesize of output 3338 [2022-12-14 12:29:14,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:14,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3217 treesize of output 3178 [2022-12-14 12:29:15,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:15,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3057 treesize of output 3098