./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/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_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/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_88350f1a-7060-4137-961f-dd1c41a1c1e6/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 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 --- 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 10:09:10,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:09:10,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:09:10,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:09:10,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:09:10,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:09:10,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:09:10,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:09:10,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:09:10,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:09:10,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:09:10,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:09:10,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:09:10,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:09:10,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:09:10,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:09:10,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:09:10,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:09:10,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:09:10,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:09:10,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:09:10,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:09:10,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:09:10,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:09:10,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:09:10,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:09:10,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:09:10,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:09:10,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:09:10,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:09:10,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:09:10,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:09:10,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:09:10,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:09:10,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:09:10,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:09:10,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:09:10,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:09:10,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:09:10,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:09:10,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:09:10,989 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-12-14 10:09:11,004 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:09:11,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:09:11,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:09:11,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:09:11,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:09:11,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:09:11,005 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:09:11,005 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:09:11,005 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:09:11,006 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:09:11,006 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:09:11,006 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:09:11,006 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:09:11,006 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:09:11,006 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:09:11,006 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:09:11,006 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:09:11,006 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:09:11,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:09:11,007 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:09:11,007 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 10:09:11,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:09:11,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:09:11,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:09:11,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:09:11,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:09:11,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:09:11,008 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-14 10:09:11,008 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:09:11,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:09:11,008 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:09:11,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:09:11,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:09:11,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:09:11,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:09:11,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:09:11,009 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:09:11,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:09:11,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:09:11,009 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:09:11,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:09:11,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:09:11,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:09:11,010 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_88350f1a-7060-4137-961f-dd1c41a1c1e6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 [2022-12-14 10:09:11,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:09:11,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:09:11,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:09:11,184 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:09:11,184 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:09:11,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2022-12-14 10:09:13,735 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:09:13,894 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:09:13,895 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2022-12-14 10:09:13,900 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/data/9f51a0a34/812832d4ca554852bf42648f0eddd638/FLAG368463a50 [2022-12-14 10:09:14,301 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/data/9f51a0a34/812832d4ca554852bf42648f0eddd638 [2022-12-14 10:09:14,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:09:14,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:09:14,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:09:14,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:09:14,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:09:14,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112acb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14, skipping insertion in model container [2022-12-14 10:09:14,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:09:14,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:09:14,461 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,461 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,462 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,465 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,465 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,466 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,466 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,466 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,469 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,469 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,469 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,470 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,470 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,471 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,471 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,471 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,472 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,472 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,477 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_88350f1a-7060-4137-961f-dd1c41a1c1e6/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2950,2963] [2022-12-14 10:09:14,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:09:14,485 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:09:14,494 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,494 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,499 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:09:14,499 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:09:14,502 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_88350f1a-7060-4137-961f-dd1c41a1c1e6/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2950,2963] [2022-12-14 10:09:14,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:09:14,513 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:09:14,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14 WrapperNode [2022-12-14 10:09:14,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:09:14,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:09:14,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:09:14,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:09:14,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,539 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-12-14 10:09:14,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:09:14,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:09:14,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:09:14,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:09:14,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,560 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:09:14,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:09:14,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:09:14,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:09:14,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (1/1) ... [2022-12-14 10:09:14,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:09:14,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:14,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:09:14,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:09:14,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:09:14,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 10:09:14,619 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 10:09:14,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 10:09:14,619 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 10:09:14,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 10:09:14,619 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 10:09:14,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:09:14,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:09:14,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:09:14,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 10:09:14,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 10:09:14,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:09:14,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:09:14,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:09:14,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:09:14,622 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 10:09:14,703 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:09:14,704 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:09:14,887 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:09:14,938 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:09:14,938 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 10:09:14,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:09:14 BoogieIcfgContainer [2022-12-14 10:09:14,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:09:14,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:09:14,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:09:14,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:09:14,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:09:14" (1/3) ... [2022-12-14 10:09:14,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bffdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:09:14, skipping insertion in model container [2022-12-14 10:09:14,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:14" (2/3) ... [2022-12-14 10:09:14,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bffdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:09:14, skipping insertion in model container [2022-12-14 10:09:14,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:09:14" (3/3) ... [2022-12-14 10:09:14,951 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2022-12-14 10:09:14,960 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 10:09:14,971 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:09:14,971 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-12-14 10:09:14,971 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 10:09:15,040 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 10:09:15,066 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:09:15,079 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 112 transitions, 248 flow [2022-12-14 10:09:15,082 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 112 transitions, 248 flow [2022-12-14 10:09:15,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 112 transitions, 248 flow [2022-12-14 10:09:15,140 INFO L130 PetriNetUnfolder]: 7/109 cut-off events. [2022-12-14 10:09:15,141 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 10:09:15,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 109 events. 7/109 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 116 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2022-12-14 10:09:15,149 INFO L119 LiptonReduction]: Number of co-enabled transitions 1622 [2022-12-14 10:09:17,960 INFO L134 LiptonReduction]: Checked pairs total: 2368 [2022-12-14 10:09:17,961 INFO L136 LiptonReduction]: Total number of compositions: 99 [2022-12-14 10:09:17,966 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 90 flow [2022-12-14 10:09:17,998 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 426 states, 401 states have (on average 3.0997506234413965) internal successors, (1243), 425 states have internal predecessors, (1243), 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 10:09:18,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:09:18,017 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;@7c339d04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:09:18,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-12-14 10:09:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 426 states, 401 states have (on average 3.0997506234413965) internal successors, (1243), 425 states have internal predecessors, (1243), 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 10:09:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:09:18,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:18,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:09:18,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:18,028 INFO L85 PathProgramCache]: Analyzing trace with hash 13840760, now seen corresponding path program 1 times [2022-12-14 10:09:18,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:18,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396598745] [2022-12-14 10:09:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:18,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:18,312 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 10:09:18,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:18,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396598745] [2022-12-14 10:09:18,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396598745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:18,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:18,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:09:18,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111450684] [2022-12-14 10:09:18,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:18,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:09:18,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:18,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:09:18,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:09:18,341 INFO L87 Difference]: Start difference. First operand has 426 states, 401 states have (on average 3.0997506234413965) internal successors, (1243), 425 states have internal predecessors, (1243), 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 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 10:09:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:18,427 INFO L93 Difference]: Finished difference Result 482 states and 1402 transitions. [2022-12-14 10:09:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:09:18,430 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 10:09:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:18,443 INFO L225 Difference]: With dead ends: 482 [2022-12-14 10:09:18,443 INFO L226 Difference]: Without dead ends: 478 [2022-12-14 10:09:18,443 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 10:09:18,446 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:18,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:09:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-12-14 10:09:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2022-12-14 10:09:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 454 states have (on average 3.066079295154185) internal successors, (1392), 477 states have internal predecessors, (1392), 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 10:09:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1392 transitions. [2022-12-14 10:09:18,510 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1392 transitions. Word has length 4 [2022-12-14 10:09:18,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:18,510 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 1392 transitions. [2022-12-14 10:09:18,511 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 10:09:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1392 transitions. [2022-12-14 10:09:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:09:18,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:18,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 10:09:18,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:09:18,512 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash 416083635, now seen corresponding path program 1 times [2022-12-14 10:09:18,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:18,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922859233] [2022-12-14 10:09:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:18,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:18,667 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 10:09:18,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:18,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922859233] [2022-12-14 10:09:18,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922859233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:18,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557044778] [2022-12-14 10:09:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:18,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:18,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:18,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:18,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:09:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:18,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:09:18,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:18,826 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 10:09:18,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:18,998 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 10:09:18,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557044778] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:18,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622424640] [2022-12-14 10:09:19,004 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 10:09:19,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:19,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2022-12-14 10:09:19,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165947345] [2022-12-14 10:09:19,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:19,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 10:09:19,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:19,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 10:09:19,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:09:19,007 INFO L87 Difference]: Start difference. First operand 478 states and 1392 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 10:09:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:19,421 INFO L93 Difference]: Finished difference Result 1222 states and 3546 transitions. [2022-12-14 10:09:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:09:19,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 10:09:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:19,429 INFO L225 Difference]: With dead ends: 1222 [2022-12-14 10:09:19,429 INFO L226 Difference]: Without dead ends: 1222 [2022-12-14 10:09:19,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:09:19,431 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 161 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:19,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 2 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:09:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2022-12-14 10:09:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 734. [2022-12-14 10:09:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 710 states have (on average 3.4492957746478874) internal successors, (2449), 733 states have internal predecessors, (2449), 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 10:09:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2449 transitions. [2022-12-14 10:09:19,471 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2449 transitions. Word has length 6 [2022-12-14 10:09:19,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:19,471 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 2449 transitions. [2022-12-14 10:09:19,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 10:09:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2449 transitions. [2022-12-14 10:09:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 10:09:19,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:19,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2022-12-14 10:09:19,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:19,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:19,674 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:19,676 INFO L85 PathProgramCache]: Analyzing trace with hash 424429871, now seen corresponding path program 1 times [2022-12-14 10:09:19,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:19,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457571913] [2022-12-14 10:09:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:19,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:19,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:19,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457571913] [2022-12-14 10:09:19,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457571913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:19,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980318671] [2022-12-14 10:09:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:19,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:19,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:19,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:19,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:09:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:19,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:09:19,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:19,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:19,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980318671] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:19,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:09:19,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-14 10:09:19,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358798912] [2022-12-14 10:09:19,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:19,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:09:19,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:19,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:09:19,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:09:19,992 INFO L87 Difference]: Start difference. First operand 734 states and 2449 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 10:09:20,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:20,022 INFO L93 Difference]: Finished difference Result 486 states and 1540 transitions. [2022-12-14 10:09:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:09:20,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 10:09:20,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:20,025 INFO L225 Difference]: With dead ends: 486 [2022-12-14 10:09:20,025 INFO L226 Difference]: Without dead ends: 486 [2022-12-14 10:09:20,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:09:20,026 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:20,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-12-14 10:09:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 486. [2022-12-14 10:09:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 478 states have (on average 3.221757322175732) internal successors, (1540), 485 states have internal predecessors, (1540), 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 10:09:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1540 transitions. [2022-12-14 10:09:20,038 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1540 transitions. Word has length 8 [2022-12-14 10:09:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:20,039 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 1540 transitions. [2022-12-14 10:09:20,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 10:09:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1540 transitions. [2022-12-14 10:09:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 10:09:20,040 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:20,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2022-12-14 10:09:20,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:09:20,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:20,241 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:20,241 INFO L85 PathProgramCache]: Analyzing trace with hash 424429872, now seen corresponding path program 1 times [2022-12-14 10:09:20,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:20,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607961492] [2022-12-14 10:09:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:20,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:20,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:20,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607961492] [2022-12-14 10:09:20,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607961492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:20,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000617364] [2022-12-14 10:09:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:20,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:20,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:20,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:20,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:09:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:20,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:09:20,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:20,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:20,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000617364] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:20,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754230622] [2022-12-14 10:09:20,741 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 10:09:20,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:20,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-12-14 10:09:20,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152449654] [2022-12-14 10:09:20,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:20,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:09:20,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:20,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:09:20,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:09:20,743 INFO L87 Difference]: Start difference. First operand 486 states and 1540 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 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 10:09:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:21,970 INFO L93 Difference]: Finished difference Result 1386 states and 4101 transitions. [2022-12-14 10:09:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 10:09:21,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 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 10:09:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:21,976 INFO L225 Difference]: With dead ends: 1386 [2022-12-14 10:09:21,976 INFO L226 Difference]: Without dead ends: 1386 [2022-12-14 10:09:21,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=799, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:09:21,977 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 441 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:21,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 6 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:09:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2022-12-14 10:09:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 552. [2022-12-14 10:09:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 544 states have (on average 3.1746323529411766) internal successors, (1727), 551 states have internal predecessors, (1727), 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 10:09:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1727 transitions. [2022-12-14 10:09:22,007 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1727 transitions. Word has length 8 [2022-12-14 10:09:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:22,007 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 1727 transitions. [2022-12-14 10:09:22,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 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 10:09:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1727 transitions. [2022-12-14 10:09:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 10:09:22,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:22,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:22,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:09:22,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:22,209 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:22,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:22,210 INFO L85 PathProgramCache]: Analyzing trace with hash -176265955, now seen corresponding path program 1 times [2022-12-14 10:09:22,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:22,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874159692] [2022-12-14 10:09:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:22,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:22,310 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 10:09:22,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874159692] [2022-12-14 10:09:22,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874159692] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:22,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380139781] [2022-12-14 10:09:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:22,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:22,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:22,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:22,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:09:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:22,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 10:09:22,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:22,400 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 10:09:22,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:22,492 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 10:09:22,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380139781] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:22,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [862166661] [2022-12-14 10:09:22,493 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 10:09:22,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:22,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-14 10:09:22,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4605167] [2022-12-14 10:09:22,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:22,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:09:22,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:22,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:09:22,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:09:22,495 INFO L87 Difference]: Start difference. First operand 552 states and 1727 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 10:09:22,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:22,620 INFO L93 Difference]: Finished difference Result 898 states and 2740 transitions. [2022-12-14 10:09:22,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:09:22,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 10:09:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:22,625 INFO L225 Difference]: With dead ends: 898 [2022-12-14 10:09:22,625 INFO L226 Difference]: Without dead ends: 898 [2022-12-14 10:09:22,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:09:22,627 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 96 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:22,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 14 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:09:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-12-14 10:09:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 704. [2022-12-14 10:09:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 696 states have (on average 3.2701149425287355) internal successors, (2276), 703 states have internal predecessors, (2276), 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 10:09:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2276 transitions. [2022-12-14 10:09:22,652 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2276 transitions. Word has length 8 [2022-12-14 10:09:22,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:22,653 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 2276 transitions. [2022-12-14 10:09:22,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 10:09:22,653 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2276 transitions. [2022-12-14 10:09:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:09:22,654 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:22,654 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1] [2022-12-14 10:09:22,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:09:22,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:22,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash -144772887, now seen corresponding path program 2 times [2022-12-14 10:09:22,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:22,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122765134] [2022-12-14 10:09:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:22,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:23,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:23,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122765134] [2022-12-14 10:09:23,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122765134] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:23,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287795275] [2022-12-14 10:09:23,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:23,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:23,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:23,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:23,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:09:23,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:09:23,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:09:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:23,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:23,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287795275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:23,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518745471] [2022-12-14 10:09:23,540 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 10:09:23,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:23,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 15 [2022-12-14 10:09:23,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883122029] [2022-12-14 10:09:23,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:23,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:09:23,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:23,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:09:23,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:09:23,542 INFO L87 Difference]: Start difference. First operand 704 states and 2276 transitions. Second operand has 16 states, 15 states have (on average 1.8) 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 10:09:23,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:23,853 INFO L93 Difference]: Finished difference Result 1080 states and 3328 transitions. [2022-12-14 10:09:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:09:23,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) 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 10 [2022-12-14 10:09:23,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:23,858 INFO L225 Difference]: With dead ends: 1080 [2022-12-14 10:09:23,859 INFO L226 Difference]: Without dead ends: 958 [2022-12-14 10:09:23,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:09:23,860 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 259 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:23,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 24 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:09:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-12-14 10:09:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 620. [2022-12-14 10:09:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 612 states have (on average 3.2091503267973858) internal successors, (1964), 619 states have internal predecessors, (1964), 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 10:09:23,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1964 transitions. [2022-12-14 10:09:23,882 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1964 transitions. Word has length 10 [2022-12-14 10:09:23,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:23,883 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 1964 transitions. [2022-12-14 10:09:23,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) 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 10:09:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1964 transitions. [2022-12-14 10:09:23,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:09:23,884 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:23,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:23,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:09:24,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 10:09:24,085 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash 600696032, now seen corresponding path program 1 times [2022-12-14 10:09:24,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:24,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188064136] [2022-12-14 10:09:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:24,210 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 10:09:24,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:24,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188064136] [2022-12-14 10:09:24,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188064136] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:24,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249258611] [2022-12-14 10:09:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:24,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:24,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:24,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:24,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:09:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:09:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:24,352 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 10:09:24,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:24,598 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 10:09:24,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249258611] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:24,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [517233547] [2022-12-14 10:09:24,599 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 10:09:24,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:24,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-12-14 10:09:24,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934677671] [2022-12-14 10:09:24,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:24,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:09:24,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:24,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:09:24,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:09:24,601 INFO L87 Difference]: Start difference. First operand 620 states and 1964 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:25,662 INFO L93 Difference]: Finished difference Result 1452 states and 4230 transitions. [2022-12-14 10:09:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 10:09:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 10:09:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:25,667 INFO L225 Difference]: With dead ends: 1452 [2022-12-14 10:09:25,667 INFO L226 Difference]: Without dead ends: 1448 [2022-12-14 10:09:25,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=744, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:09:25,668 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 299 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:25,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 10 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:09:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2022-12-14 10:09:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 752. [2022-12-14 10:09:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 746 states have (on average 3.227882037533512) internal successors, (2408), 751 states have internal predecessors, (2408), 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 10:09:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2408 transitions. [2022-12-14 10:09:25,686 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2408 transitions. Word has length 10 [2022-12-14 10:09:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:25,686 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 2408 transitions. [2022-12-14 10:09:25,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2408 transitions. [2022-12-14 10:09:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:09:25,687 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:25,687 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:25,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:25,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 10:09:25,888 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1493805592, now seen corresponding path program 1 times [2022-12-14 10:09:25,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:25,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371399573] [2022-12-14 10:09:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:25,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:26,017 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 10:09:26,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371399573] [2022-12-14 10:09:26,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371399573] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:26,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:26,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:09:26,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156525096] [2022-12-14 10:09:26,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:26,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:09:26,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:26,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:09:26,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:09:26,019 INFO L87 Difference]: Start difference. First operand 752 states and 2408 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 10:09:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:26,062 INFO L93 Difference]: Finished difference Result 926 states and 2924 transitions. [2022-12-14 10:09:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:09:26,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 10 [2022-12-14 10:09:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:26,068 INFO L225 Difference]: With dead ends: 926 [2022-12-14 10:09:26,068 INFO L226 Difference]: Without dead ends: 914 [2022-12-14 10:09:26,068 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 10:09:26,069 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:26,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-12-14 10:09:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 770. [2022-12-14 10:09:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 764 states have (on average 3.2853403141361257) internal successors, (2510), 769 states have internal predecessors, (2510), 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 10:09:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2510 transitions. [2022-12-14 10:09:26,090 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2510 transitions. Word has length 10 [2022-12-14 10:09:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:26,090 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 2510 transitions. [2022-12-14 10:09:26,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 10:09:26,091 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2510 transitions. [2022-12-14 10:09:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:09:26,091 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:26,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:26,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:09:26,092 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:26,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1493805326, now seen corresponding path program 2 times [2022-12-14 10:09:26,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:26,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385362002] [2022-12-14 10:09:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:26,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:26,190 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 10:09:26,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:26,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385362002] [2022-12-14 10:09:26,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385362002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:26,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724547496] [2022-12-14 10:09:26,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:26,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:26,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:26,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:26,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:09:26,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:09:26,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:09:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:26,340 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 10:09:26,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:26,730 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 10:09:26,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724547496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:26,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1345918634] [2022-12-14 10:09:26,730 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 10:09:26,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:26,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2022-12-14 10:09:26,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775373642] [2022-12-14 10:09:26,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:26,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:09:26,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:09:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:09:26,732 INFO L87 Difference]: Start difference. First operand 770 states and 2510 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:27,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:27,749 INFO L93 Difference]: Finished difference Result 1712 states and 5178 transitions. [2022-12-14 10:09:27,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 10:09:27,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 10:09:27,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:27,754 INFO L225 Difference]: With dead ends: 1712 [2022-12-14 10:09:27,754 INFO L226 Difference]: Without dead ends: 1700 [2022-12-14 10:09:27,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=424, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:09:27,754 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 197 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:27,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 13 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:09:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-12-14 10:09:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 836. [2022-12-14 10:09:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 830 states have (on average 3.4072289156626505) internal successors, (2828), 835 states have internal predecessors, (2828), 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 10:09:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2828 transitions. [2022-12-14 10:09:27,773 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2828 transitions. Word has length 10 [2022-12-14 10:09:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:27,773 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 2828 transitions. [2022-12-14 10:09:27,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:27,773 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2828 transitions. [2022-12-14 10:09:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:09:27,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:27,774 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:27,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:09:27,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:27,976 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:27,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:27,977 INFO L85 PathProgramCache]: Analyzing trace with hash -49197295, now seen corresponding path program 1 times [2022-12-14 10:09:27,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:27,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547411549] [2022-12-14 10:09:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:27,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:28,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:28,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547411549] [2022-12-14 10:09:28,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547411549] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:28,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840981187] [2022-12-14 10:09:28,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:28,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:28,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:28,115 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:28,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:09:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:28,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:09:28,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:28,312 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 10:09:28,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:28,590 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 10:09:28,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840981187] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:28,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1843516358] [2022-12-14 10:09:28,590 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 10:09:28,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:28,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 6, 6] total 14 [2022-12-14 10:09:28,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061889618] [2022-12-14 10:09:28,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:28,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:09:28,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:28,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:09:28,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:09:28,592 INFO L87 Difference]: Start difference. First operand 836 states and 2828 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 10:09:29,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:29,325 INFO L93 Difference]: Finished difference Result 1804 states and 5898 transitions. [2022-12-14 10:09:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 10:09:29,325 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 10:09:29,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:29,332 INFO L225 Difference]: With dead ends: 1804 [2022-12-14 10:09:29,332 INFO L226 Difference]: Without dead ends: 1756 [2022-12-14 10:09:29,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:09:29,332 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 290 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:29,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 8 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:09:29,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-12-14 10:09:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 990. [2022-12-14 10:09:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 984 states have (on average 3.428861788617886) internal successors, (3374), 989 states have internal predecessors, (3374), 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 10:09:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 3374 transitions. [2022-12-14 10:09:29,352 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 3374 transitions. Word has length 12 [2022-12-14 10:09:29,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:29,352 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 3374 transitions. [2022-12-14 10:09:29,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 10:09:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 3374 transitions. [2022-12-14 10:09:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:09:29,353 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:29,353 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:29,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:09:29,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 10:09:29,554 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:29,555 INFO L85 PathProgramCache]: Analyzing trace with hash -49197560, now seen corresponding path program 1 times [2022-12-14 10:09:29,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:29,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951311848] [2022-12-14 10:09:29,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:29,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:29,708 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 10:09:29,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:29,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951311848] [2022-12-14 10:09:29,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951311848] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6254881] [2022-12-14 10:09:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:29,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:29,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:29,710 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:29,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:09:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:29,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:09:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:29,911 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 10:09:29,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:30,273 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 10:09:30,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6254881] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:30,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [48221448] [2022-12-14 10:09:30,274 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 10:09:30,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:30,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2022-12-14 10:09:30,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235897798] [2022-12-14 10:09:30,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:30,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 10:09:30,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 10:09:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:09:30,275 INFO L87 Difference]: Start difference. First operand 990 states and 3374 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 10:09:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:31,789 INFO L93 Difference]: Finished difference Result 3122 states and 10419 transitions. [2022-12-14 10:09:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 10:09:31,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 10:09:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:31,817 INFO L225 Difference]: With dead ends: 3122 [2022-12-14 10:09:31,817 INFO L226 Difference]: Without dead ends: 3110 [2022-12-14 10:09:31,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=458, Invalid=802, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:09:31,819 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 359 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:31,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 12 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:09:31,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2022-12-14 10:09:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 1762. [2022-12-14 10:09:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1756 states have (on average 3.7966970387243735) internal successors, (6667), 1761 states have internal predecessors, (6667), 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 10:09:31,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6667 transitions. [2022-12-14 10:09:31,885 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6667 transitions. Word has length 12 [2022-12-14 10:09:31,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:31,885 INFO L495 AbstractCegarLoop]: Abstraction has 1762 states and 6667 transitions. [2022-12-14 10:09:31,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 10:09:31,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6667 transitions. [2022-12-14 10:09:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:09:31,887 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:31,887 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:31,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:09:32,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 10:09:32,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:32,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:32,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1743278561, now seen corresponding path program 1 times [2022-12-14 10:09:32,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:32,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855266551] [2022-12-14 10:09:32,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:32,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:32,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:32,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855266551] [2022-12-14 10:09:32,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855266551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:32,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173971646] [2022-12-14 10:09:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:32,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:32,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:32,258 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:32,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:09:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:32,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:09:32,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:32,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:32,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173971646] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:32,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487382606] [2022-12-14 10:09:32,767 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 10:09:32,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:32,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2022-12-14 10:09:32,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710676982] [2022-12-14 10:09:32,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:32,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 10:09:32,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 10:09:32,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:09:32,768 INFO L87 Difference]: Start difference. First operand 1762 states and 6667 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 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 10:09:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:34,067 INFO L93 Difference]: Finished difference Result 3270 states and 11182 transitions. [2022-12-14 10:09:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 10:09:34,067 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 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 10:09:34,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:34,075 INFO L225 Difference]: With dead ends: 3270 [2022-12-14 10:09:34,075 INFO L226 Difference]: Without dead ends: 2890 [2022-12-14 10:09:34,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=412, Invalid=778, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:09:34,075 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 318 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:34,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 13 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:09:34,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2022-12-14 10:09:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 1922. [2022-12-14 10:09:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1918 states have (on average 3.3879040667361835) internal successors, (6498), 1921 states have internal predecessors, (6498), 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 10:09:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 6498 transitions. [2022-12-14 10:09:34,126 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 6498 transitions. Word has length 12 [2022-12-14 10:09:34,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:34,126 INFO L495 AbstractCegarLoop]: Abstraction has 1922 states and 6498 transitions. [2022-12-14 10:09:34,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 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 10:09:34,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 6498 transitions. [2022-12-14 10:09:34,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:09:34,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:34,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:34,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:34,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 10:09:34,328 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:34,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1028110365, now seen corresponding path program 2 times [2022-12-14 10:09:34,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:34,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939141945] [2022-12-14 10:09:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:34,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:34,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:34,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939141945] [2022-12-14 10:09:34,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939141945] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:34,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518856471] [2022-12-14 10:09:34,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:34,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:34,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:34,467 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:34,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:09:34,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:09:34,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:34,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:09:34,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:34,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:34,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518856471] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:34,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1084228199] [2022-12-14 10:09:34,936 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 10:09:34,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:34,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2022-12-14 10:09:34,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754944589] [2022-12-14 10:09:34,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:34,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:09:34,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:34,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:09:34,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:09:34,937 INFO L87 Difference]: Start difference. First operand 1922 states and 6498 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 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 10:09:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:35,515 INFO L93 Difference]: Finished difference Result 3516 states and 11306 transitions. [2022-12-14 10:09:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 10:09:35,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 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 10:09:35,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:35,523 INFO L225 Difference]: With dead ends: 3516 [2022-12-14 10:09:35,523 INFO L226 Difference]: Without dead ends: 3434 [2022-12-14 10:09:35,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:09:35,524 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 303 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:35,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 37 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:09:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2022-12-14 10:09:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2206. [2022-12-14 10:09:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2202 states have (on average 3.337420526793824) internal successors, (7349), 2205 states have internal predecessors, (7349), 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 10:09:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 7349 transitions. [2022-12-14 10:09:35,563 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 7349 transitions. Word has length 12 [2022-12-14 10:09:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:35,563 INFO L495 AbstractCegarLoop]: Abstraction has 2206 states and 7349 transitions. [2022-12-14 10:09:35,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 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 10:09:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 7349 transitions. [2022-12-14 10:09:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 10:09:35,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:35,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:35,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:35,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:35,765 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:35,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:35,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1573656843, now seen corresponding path program 1 times [2022-12-14 10:09:35,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:35,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386415790] [2022-12-14 10:09:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:35,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:35,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386415790] [2022-12-14 10:09:35,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386415790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540306406] [2022-12-14 10:09:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:35,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:35,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:35,995 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:35,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:09:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:36,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:09:36,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:09:36,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:09:36,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540306406] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:36,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1516793138] [2022-12-14 10:09:36,259 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 10:09:36,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:36,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2022-12-14 10:09:36,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734734543] [2022-12-14 10:09:36,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:36,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:09:36,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:09:36,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:09:36,260 INFO L87 Difference]: Start difference. First operand 2206 states and 7349 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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 10:09:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:36,866 INFO L93 Difference]: Finished difference Result 4432 states and 14520 transitions. [2022-12-14 10:09:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 10:09:36,867 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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 10:09:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:36,876 INFO L225 Difference]: With dead ends: 4432 [2022-12-14 10:09:36,876 INFO L226 Difference]: Without dead ends: 4302 [2022-12-14 10:09:36,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:09:36,877 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 385 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:36,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 25 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:09:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2022-12-14 10:09:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 3040. [2022-12-14 10:09:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3040 states, 3036 states have (on average 3.298748353096179) internal successors, (10015), 3039 states have internal predecessors, (10015), 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 10:09:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 10015 transitions. [2022-12-14 10:09:36,932 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 10015 transitions. Word has length 14 [2022-12-14 10:09:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:36,932 INFO L495 AbstractCegarLoop]: Abstraction has 3040 states and 10015 transitions. [2022-12-14 10:09:36,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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 10:09:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 10015 transitions. [2022-12-14 10:09:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 10:09:36,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:36,934 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:36,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 10:09:37,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:37,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:37,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash -81663968, now seen corresponding path program 2 times [2022-12-14 10:09:37,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:37,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964108655] [2022-12-14 10:09:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:37,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:37,264 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 10:09:37,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:37,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964108655] [2022-12-14 10:09:37,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964108655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:37,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346221048] [2022-12-14 10:09:37,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:37,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:37,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:37,266 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:37,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 10:09:37,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:09:37,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:37,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:09:37,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:37,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:37,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346221048] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1194842458] [2022-12-14 10:09:37,535 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 10:09:37,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:37,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-12-14 10:09:37,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227974205] [2022-12-14 10:09:37,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 10:09:37,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 10:09:37,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:09:37,537 INFO L87 Difference]: Start difference. First operand 3040 states and 10015 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 10:09:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:38,242 INFO L93 Difference]: Finished difference Result 6986 states and 22049 transitions. [2022-12-14 10:09:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 10:09:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 10:09:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:38,257 INFO L225 Difference]: With dead ends: 6986 [2022-12-14 10:09:38,257 INFO L226 Difference]: Without dead ends: 6586 [2022-12-14 10:09:38,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=780, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:09:38,258 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 662 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:38,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 18 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:09:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2022-12-14 10:09:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 2794. [2022-12-14 10:09:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2790 states have (on average 3.1813620071684587) internal successors, (8876), 2793 states have internal predecessors, (8876), 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 10:09:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 8876 transitions. [2022-12-14 10:09:38,334 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 8876 transitions. Word has length 14 [2022-12-14 10:09:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:38,334 INFO L495 AbstractCegarLoop]: Abstraction has 2794 states and 8876 transitions. [2022-12-14 10:09:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 10:09:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 8876 transitions. [2022-12-14 10:09:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:09:38,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:38,336 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:38,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 10:09:38,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 10:09:38,537 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash -286948918, now seen corresponding path program 3 times [2022-12-14 10:09:38,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:38,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082905698] [2022-12-14 10:09:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:38,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:38,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:38,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082905698] [2022-12-14 10:09:38,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082905698] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:38,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448658963] [2022-12-14 10:09:38,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:09:38,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:38,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:38,825 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:38,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 10:09:38,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:09:38,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:38,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:09:38,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:39,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:39,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448658963] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:39,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [50574903] [2022-12-14 10:09:39,392 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 10:09:39,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:39,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 8] total 24 [2022-12-14 10:09:39,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357091738] [2022-12-14 10:09:39,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:39,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:09:39,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:39,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:09:39,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:09:39,393 INFO L87 Difference]: Start difference. First operand 2794 states and 8876 transitions. Second operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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 10:09:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:40,826 INFO L93 Difference]: Finished difference Result 5696 states and 18081 transitions. [2022-12-14 10:09:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 10:09:40,827 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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 16 [2022-12-14 10:09:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:40,836 INFO L225 Difference]: With dead ends: 5696 [2022-12-14 10:09:40,836 INFO L226 Difference]: Without dead ends: 5664 [2022-12-14 10:09:40,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1471, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 10:09:40,837 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 581 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:40,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 13 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:09:40,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5664 states. [2022-12-14 10:09:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5664 to 3014. [2022-12-14 10:09:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3010 states have (on average 3.1764119601328904) internal successors, (9561), 3013 states have internal predecessors, (9561), 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 10:09:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 9561 transitions. [2022-12-14 10:09:40,897 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 9561 transitions. Word has length 16 [2022-12-14 10:09:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:40,897 INFO L495 AbstractCegarLoop]: Abstraction has 3014 states and 9561 transitions. [2022-12-14 10:09:40,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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 10:09:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 9561 transitions. [2022-12-14 10:09:40,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:09:40,906 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:40,906 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:40,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 10:09:41,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:41,107 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:41,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:41,107 INFO L85 PathProgramCache]: Analyzing trace with hash -227962738, now seen corresponding path program 4 times [2022-12-14 10:09:41,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:41,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612853907] [2022-12-14 10:09:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:41,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:41,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:41,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612853907] [2022-12-14 10:09:41,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612853907] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:41,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910585492] [2022-12-14 10:09:41,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:09:41,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:41,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:41,392 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:41,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 10:09:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:41,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:09:41,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:41,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:41,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910585492] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:41,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711535760] [2022-12-14 10:09:41,986 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 10:09:41,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:41,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 24 [2022-12-14 10:09:41,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416511884] [2022-12-14 10:09:41,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:41,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:09:41,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:09:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:09:41,987 INFO L87 Difference]: Start difference. First operand 3014 states and 9561 transitions. Second operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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 10:09:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:44,370 INFO L93 Difference]: Finished difference Result 6728 states and 21257 transitions. [2022-12-14 10:09:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 10:09:44,370 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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 16 [2022-12-14 10:09:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:44,382 INFO L225 Difference]: With dead ends: 6728 [2022-12-14 10:09:44,382 INFO L226 Difference]: Without dead ends: 6690 [2022-12-14 10:09:44,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1269, Invalid=2763, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 10:09:44,383 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 894 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:44,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 24 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:09:44,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6690 states. [2022-12-14 10:09:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6690 to 3680. [2022-12-14 10:09:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3676 states have (on average 3.2170837867247006) internal successors, (11826), 3679 states have internal predecessors, (11826), 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 10:09:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 11826 transitions. [2022-12-14 10:09:44,467 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 11826 transitions. Word has length 16 [2022-12-14 10:09:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:44,468 INFO L495 AbstractCegarLoop]: Abstraction has 3680 states and 11826 transitions. [2022-12-14 10:09:44,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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 10:09:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 11826 transitions. [2022-12-14 10:09:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:09:44,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:44,472 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:44,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:44,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 10:09:44,673 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash -227963003, now seen corresponding path program 2 times [2022-12-14 10:09:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:44,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536532812] [2022-12-14 10:09:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:44,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:45,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:45,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536532812] [2022-12-14 10:09:45,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536532812] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:45,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903934387] [2022-12-14 10:09:45,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:45,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:45,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:45,027 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:45,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 10:09:45,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:09:45,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:45,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 10:09:45,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:45,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:45,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903934387] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:45,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305934563] [2022-12-14 10:09:45,638 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 10:09:45,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:45,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 26 [2022-12-14 10:09:45,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300689597] [2022-12-14 10:09:45,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:45,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:09:45,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:45,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:09:45,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:09:45,640 INFO L87 Difference]: Start difference. First operand 3680 states and 11826 transitions. Second operand has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 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 10:09:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:48,750 INFO L93 Difference]: Finished difference Result 6890 states and 21735 transitions. [2022-12-14 10:09:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-14 10:09:48,750 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 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 16 [2022-12-14 10:09:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:48,761 INFO L225 Difference]: With dead ends: 6890 [2022-12-14 10:09:48,761 INFO L226 Difference]: Without dead ends: 6830 [2022-12-14 10:09:48,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1674, Invalid=4026, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 10:09:48,763 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 736 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:48,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 19 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:09:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6830 states. [2022-12-14 10:09:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6830 to 4046. [2022-12-14 10:09:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4046 states, 4042 states have (on average 3.232310737258783) internal successors, (13065), 4045 states have internal predecessors, (13065), 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 10:09:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4046 states to 4046 states and 13065 transitions. [2022-12-14 10:09:48,839 INFO L78 Accepts]: Start accepts. Automaton has 4046 states and 13065 transitions. Word has length 16 [2022-12-14 10:09:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:48,839 INFO L495 AbstractCegarLoop]: Abstraction has 4046 states and 13065 transitions. [2022-12-14 10:09:48,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 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 10:09:48,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4046 states and 13065 transitions. [2022-12-14 10:09:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:09:48,849 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:48,849 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:48,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 10:09:49,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 10:09:49,050 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:49,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:49,050 INFO L85 PathProgramCache]: Analyzing trace with hash -227905078, now seen corresponding path program 5 times [2022-12-14 10:09:49,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:49,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881220223] [2022-12-14 10:09:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:49,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:49,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:49,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881220223] [2022-12-14 10:09:49,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881220223] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:49,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255831939] [2022-12-14 10:09:49,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:49,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:49,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:49,275 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:49,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 10:09:49,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:09:49,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 10:09:49,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:49,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:49,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255831939] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:49,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632651251] [2022-12-14 10:09:49,861 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 10:09:49,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:49,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 22 [2022-12-14 10:09:49,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139162270] [2022-12-14 10:09:49,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:49,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 10:09:49,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:49,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 10:09:49,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:09:49,863 INFO L87 Difference]: Start difference. First operand 4046 states and 13065 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 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 10:09:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:51,242 INFO L93 Difference]: Finished difference Result 7318 states and 23603 transitions. [2022-12-14 10:09:51,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 10:09:51,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 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 16 [2022-12-14 10:09:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:51,258 INFO L225 Difference]: With dead ends: 7318 [2022-12-14 10:09:51,258 INFO L226 Difference]: Without dead ends: 7254 [2022-12-14 10:09:51,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=662, Invalid=1318, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 10:09:51,259 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 588 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:51,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 55 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:09:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7254 states. [2022-12-14 10:09:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7254 to 4824. [2022-12-14 10:09:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4824 states, 4820 states have (on average 3.2690871369294605) internal successors, (15757), 4823 states have internal predecessors, (15757), 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 10:09:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4824 states to 4824 states and 15757 transitions. [2022-12-14 10:09:51,370 INFO L78 Accepts]: Start accepts. Automaton has 4824 states and 15757 transitions. Word has length 16 [2022-12-14 10:09:51,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:51,370 INFO L495 AbstractCegarLoop]: Abstraction has 4824 states and 15757 transitions. [2022-12-14 10:09:51,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 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 10:09:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 4824 states and 15757 transitions. [2022-12-14 10:09:51,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:09:51,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:51,373 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:51,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 10:09:51,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:51,573 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:51,574 INFO L85 PathProgramCache]: Analyzing trace with hash -629969617, now seen corresponding path program 1 times [2022-12-14 10:09:51,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:51,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080878305] [2022-12-14 10:09:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:51,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:51,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080878305] [2022-12-14 10:09:51,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080878305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170834999] [2022-12-14 10:09:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:51,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:51,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:51,778 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:51,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 10:09:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:51,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:09:51,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:52,055 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 10:09:52,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:52,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170834999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570528215] [2022-12-14 10:09:52,627 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 10:09:52,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:52,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 26 [2022-12-14 10:09:52,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609419758] [2022-12-14 10:09:52,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:52,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:09:52,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:52,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:09:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:09:52,629 INFO L87 Difference]: Start difference. First operand 4824 states and 15757 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 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 10:09:57,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:57,889 INFO L93 Difference]: Finished difference Result 13038 states and 40529 transitions. [2022-12-14 10:09:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-14 10:09:57,890 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 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 16 [2022-12-14 10:09:57,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:57,914 INFO L225 Difference]: With dead ends: 13038 [2022-12-14 10:09:57,914 INFO L226 Difference]: Without dead ends: 12776 [2022-12-14 10:09:57,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3934 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2619, Invalid=8301, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 10:09:57,916 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 946 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:57,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 33 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:09:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12776 states. [2022-12-14 10:09:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12776 to 7706. [2022-12-14 10:09:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7706 states, 7702 states have (on average 3.2823941833290053) internal successors, (25281), 7705 states have internal predecessors, (25281), 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 10:09:58,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7706 states to 7706 states and 25281 transitions. [2022-12-14 10:09:58,096 INFO L78 Accepts]: Start accepts. Automaton has 7706 states and 25281 transitions. Word has length 16 [2022-12-14 10:09:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:58,096 INFO L495 AbstractCegarLoop]: Abstraction has 7706 states and 25281 transitions. [2022-12-14 10:09:58,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 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 10:09:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7706 states and 25281 transitions. [2022-12-14 10:09:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:09:58,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:58,100 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:58,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 10:09:58,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:58,301 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:09:58,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:58,302 INFO L85 PathProgramCache]: Analyzing trace with hash -889208711, now seen corresponding path program 1 times [2022-12-14 10:09:58,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:58,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757387235] [2022-12-14 10:09:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:58,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:58,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:58,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757387235] [2022-12-14 10:09:58,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757387235] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:58,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103007176] [2022-12-14 10:09:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:58,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:58,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:58,611 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:58,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 10:09:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:58,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:09:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:58,878 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 10:09:58,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:59,299 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 10:09:59,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103007176] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:59,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116296344] [2022-12-14 10:09:59,299 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 10:09:59,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:59,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2022-12-14 10:09:59,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845205402] [2022-12-14 10:09:59,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:59,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:09:59,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:59,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:09:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:09:59,301 INFO L87 Difference]: Start difference. First operand 7706 states and 25281 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 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 10:10:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:06,392 INFO L93 Difference]: Finished difference Result 16328 states and 50710 transitions. [2022-12-14 10:10:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-12-14 10:10:06,393 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 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 16 [2022-12-14 10:10:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:06,420 INFO L225 Difference]: With dead ends: 16328 [2022-12-14 10:10:06,420 INFO L226 Difference]: Without dead ends: 16292 [2022-12-14 10:10:06,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5680 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3080, Invalid=10962, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 10:10:06,422 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 760 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:06,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 61 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 10:10:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16292 states. [2022-12-14 10:10:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16292 to 8290. [2022-12-14 10:10:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8290 states, 8286 states have (on average 3.2815592565773595) internal successors, (27191), 8289 states have internal predecessors, (27191), 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 10:10:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8290 states to 8290 states and 27191 transitions. [2022-12-14 10:10:06,610 INFO L78 Accepts]: Start accepts. Automaton has 8290 states and 27191 transitions. Word has length 16 [2022-12-14 10:10:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:06,610 INFO L495 AbstractCegarLoop]: Abstraction has 8290 states and 27191 transitions. [2022-12-14 10:10:06,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 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 10:10:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8290 states and 27191 transitions. [2022-12-14 10:10:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:10:06,612 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:06,613 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:06,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 10:10:06,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:06,814 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:10:06,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:06,815 INFO L85 PathProgramCache]: Analyzing trace with hash -885633791, now seen corresponding path program 2 times [2022-12-14 10:10:06,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:10:06,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440145811] [2022-12-14 10:10:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:06,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:10:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:10:07,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:10:07,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440145811] [2022-12-14 10:10:07,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440145811] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:07,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404283239] [2022-12-14 10:10:07,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:10:07,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:07,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:10:07,106 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:10:07,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 10:10:07,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:10:07,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:10:07,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:10:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:07,348 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 10:10:07,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:07,737 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 10:10:07,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404283239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:10:07,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [160393985] [2022-12-14 10:10:07,738 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 10:10:07,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:10:07,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-14 10:10:07,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735313491] [2022-12-14 10:10:07,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:10:07,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:10:07,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:10:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:10:07,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:10:07,739 INFO L87 Difference]: Start difference. First operand 8290 states and 27191 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 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 10:10:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:13,711 INFO L93 Difference]: Finished difference Result 15574 states and 50017 transitions. [2022-12-14 10:10:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-14 10:10:13,712 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 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 16 [2022-12-14 10:10:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:13,738 INFO L225 Difference]: With dead ends: 15574 [2022-12-14 10:10:13,738 INFO L226 Difference]: Without dead ends: 15520 [2022-12-14 10:10:13,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4012 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2045, Invalid=9297, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 10:10:13,740 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1400 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:13,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 80 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:10:13,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15520 states. [2022-12-14 10:10:13,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15520 to 10372. [2022-12-14 10:10:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10372 states, 10368 states have (on average 3.2698688271604937) internal successors, (33902), 10371 states have internal predecessors, (33902), 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 10:10:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10372 states to 10372 states and 33902 transitions. [2022-12-14 10:10:14,024 INFO L78 Accepts]: Start accepts. Automaton has 10372 states and 33902 transitions. Word has length 16 [2022-12-14 10:10:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:14,024 INFO L495 AbstractCegarLoop]: Abstraction has 10372 states and 33902 transitions. [2022-12-14 10:10:14,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 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 10:10:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 10372 states and 33902 transitions. [2022-12-14 10:10:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:10:14,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:14,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:14,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 10:10:14,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 10:10:14,230 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:10:14,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:14,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1710613765, now seen corresponding path program 2 times [2022-12-14 10:10:14,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:10:14,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431971722] [2022-12-14 10:10:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:14,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:10:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:14,475 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 10:10:14,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:10:14,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431971722] [2022-12-14 10:10:14,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431971722] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:14,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509613244] [2022-12-14 10:10:14,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:10:14,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:14,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:10:14,476 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:10:14,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 10:10:14,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:10:14,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:10:14,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:10:14,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:14,787 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 10:10:14,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:15,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509613244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:10:15,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631569694] [2022-12-14 10:10:15,155 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 10:10:15,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:10:15,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2022-12-14 10:10:15,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168101152] [2022-12-14 10:10:15,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:10:15,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 10:10:15,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:10:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 10:10:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:10:15,157 INFO L87 Difference]: Start difference. First operand 10372 states and 33902 transitions. Second operand has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 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 10:10:19,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:19,849 INFO L93 Difference]: Finished difference Result 22978 states and 74673 transitions. [2022-12-14 10:10:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-14 10:10:19,850 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 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 16 [2022-12-14 10:10:19,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:19,893 INFO L225 Difference]: With dead ends: 22978 [2022-12-14 10:10:19,893 INFO L226 Difference]: Without dead ends: 22916 [2022-12-14 10:10:19,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3500 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2665, Invalid=5891, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 10:10:19,894 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 754 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:19,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 72 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:10:19,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22916 states. [2022-12-14 10:10:20,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22916 to 15582. [2022-12-14 10:10:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15582 states, 15578 states have (on average 3.289510848632687) internal successors, (51244), 15581 states have internal predecessors, (51244), 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 10:10:20,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15582 states to 15582 states and 51244 transitions. [2022-12-14 10:10:20,346 INFO L78 Accepts]: Start accepts. Automaton has 15582 states and 51244 transitions. Word has length 16 [2022-12-14 10:10:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:20,346 INFO L495 AbstractCegarLoop]: Abstraction has 15582 states and 51244 transitions. [2022-12-14 10:10:20,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 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 10:10:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 15582 states and 51244 transitions. [2022-12-14 10:10:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:10:20,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:20,351 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:20,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 10:10:20,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 10:10:20,552 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:10:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:20,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1710620275, now seen corresponding path program 3 times [2022-12-14 10:10:20,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:10:20,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580311571] [2022-12-14 10:10:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:20,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:10:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:20,828 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 10:10:20,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:10:20,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580311571] [2022-12-14 10:10:20,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580311571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:20,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324643081] [2022-12-14 10:10:20,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:10:20,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:20,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:10:20,830 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:10:20,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 10:10:20,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:10:20,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:10:20,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:10:20,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:21,099 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 10:10:21,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:21,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324643081] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:10:21,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1473879105] [2022-12-14 10:10:21,836 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 10:10:21,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:10:21,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2022-12-14 10:10:21,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363511258] [2022-12-14 10:10:21,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:10:21,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 10:10:21,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:10:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 10:10:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:10:21,838 INFO L87 Difference]: Start difference. First operand 15582 states and 51244 transitions. Second operand has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 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 10:10:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:40,010 INFO L93 Difference]: Finished difference Result 42568 states and 136020 transitions. [2022-12-14 10:10:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-12-14 10:10:40,010 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 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 16 [2022-12-14 10:10:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:40,118 INFO L225 Difference]: With dead ends: 42568 [2022-12-14 10:10:40,118 INFO L226 Difference]: Without dead ends: 42226 [2022-12-14 10:10:40,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23103 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=9676, Invalid=38504, Unknown=0, NotChecked=0, Total=48180 [2022-12-14 10:10:40,122 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 985 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:40,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [985 Valid, 43 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 2630 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 10:10:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42226 states. [2022-12-14 10:10:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42226 to 19724. [2022-12-14 10:10:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19724 states, 19720 states have (on average 3.2657707910750506) internal successors, (64401), 19723 states have internal predecessors, (64401), 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 10:10:40,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19724 states to 19724 states and 64401 transitions. [2022-12-14 10:10:40,761 INFO L78 Accepts]: Start accepts. Automaton has 19724 states and 64401 transitions. Word has length 16 [2022-12-14 10:10:40,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:40,761 INFO L495 AbstractCegarLoop]: Abstraction has 19724 states and 64401 transitions. [2022-12-14 10:10:40,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 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 10:10:40,762 INFO L276 IsEmpty]: Start isEmpty. Operand 19724 states and 64401 transitions. [2022-12-14 10:10:40,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 10:10:40,767 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:40,767 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:40,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 10:10:40,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:40,969 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:10:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:40,970 INFO L85 PathProgramCache]: Analyzing trace with hash -103188850, now seen corresponding path program 3 times [2022-12-14 10:10:40,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:10:40,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836376874] [2022-12-14 10:10:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:40,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:10:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:41,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:10:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836376874] [2022-12-14 10:10:41,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836376874] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654829899] [2022-12-14 10:10:41,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:10:41,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:41,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:10:41,290 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:10:41,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 10:10:41,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:10:41,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:10:41,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 10:10:41,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:41,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:10:42,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654829899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:10:42,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [47831968] [2022-12-14 10:10:42,034 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 10:10:42,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:10:42,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 10] total 28 [2022-12-14 10:10:42,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251637473] [2022-12-14 10:10:42,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:10:42,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 10:10:42,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:10:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 10:10:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:10:42,035 INFO L87 Difference]: Start difference. First operand 19724 states and 64401 transitions. Second operand has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 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 10:10:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:47,212 INFO L93 Difference]: Finished difference Result 44476 states and 142640 transitions. [2022-12-14 10:10:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-14 10:10:47,213 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 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 18 [2022-12-14 10:10:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:47,332 INFO L225 Difference]: With dead ends: 44476 [2022-12-14 10:10:47,332 INFO L226 Difference]: Without dead ends: 44230 [2022-12-14 10:10:47,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4168 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 10:10:47,333 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 988 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:47,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 5 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:10:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44230 states. [2022-12-14 10:10:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44230 to 22890. [2022-12-14 10:10:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22890 states, 22886 states have (on average 3.2642663637158087) internal successors, (74706), 22889 states have internal predecessors, (74706), 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 10:10:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22890 states to 22890 states and 74706 transitions. [2022-12-14 10:10:48,178 INFO L78 Accepts]: Start accepts. Automaton has 22890 states and 74706 transitions. Word has length 18 [2022-12-14 10:10:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:48,178 INFO L495 AbstractCegarLoop]: Abstraction has 22890 states and 74706 transitions. [2022-12-14 10:10:48,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 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 10:10:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 22890 states and 74706 transitions. [2022-12-14 10:10:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 10:10:48,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:48,185 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:48,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 10:10:48,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 10:10:48,386 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:10:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:48,387 INFO L85 PathProgramCache]: Analyzing trace with hash -147063122, now seen corresponding path program 4 times [2022-12-14 10:10:48,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:10:48,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689338280] [2022-12-14 10:10:48,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:48,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:10:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:10:48,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:10:48,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689338280] [2022-12-14 10:10:48,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689338280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:48,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877981460] [2022-12-14 10:10:48,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:10:48,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:48,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:10:48,732 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:10:48,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 10:10:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:48,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:10:48,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:49,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:49,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877981460] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:10:49,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508996424] [2022-12-14 10:10:49,845 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 10:10:49,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:10:49,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 30 [2022-12-14 10:10:49,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921743904] [2022-12-14 10:10:49,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:10:49,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 10:10:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:10:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 10:10:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:10:49,846 INFO L87 Difference]: Start difference. First operand 22890 states and 74706 transitions. Second operand has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 31 states have internal predecessors, (52), 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 10:10:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:58,268 INFO L93 Difference]: Finished difference Result 48434 states and 157575 transitions. [2022-12-14 10:10:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-12-14 10:10:58,269 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 31 states have internal predecessors, (52), 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 18 [2022-12-14 10:10:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:58,417 INFO L225 Difference]: With dead ends: 48434 [2022-12-14 10:10:58,417 INFO L226 Difference]: Without dead ends: 48138 [2022-12-14 10:10:58,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5424 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3870, Invalid=11136, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 10:10:58,418 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1899 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:58,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1899 Valid, 45 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 10:10:58,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48138 states. [2022-12-14 10:10:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48138 to 34322. [2022-12-14 10:10:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34322 states, 34318 states have (on average 3.257445072556676) internal successors, (111789), 34321 states have internal predecessors, (111789), 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 10:10:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34322 states to 34322 states and 111789 transitions. [2022-12-14 10:10:59,471 INFO L78 Accepts]: Start accepts. Automaton has 34322 states and 111789 transitions. Word has length 18 [2022-12-14 10:10:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:59,471 INFO L495 AbstractCegarLoop]: Abstraction has 34322 states and 111789 transitions. [2022-12-14 10:10:59,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 31 states have internal predecessors, (52), 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 10:10:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 34322 states and 111789 transitions. [2022-12-14 10:10:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 10:10:59,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:59,479 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:59,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 10:10:59,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 10:10:59,680 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:10:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1769503786, now seen corresponding path program 4 times [2022-12-14 10:10:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:10:59,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651344150] [2022-12-14 10:10:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:59,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:10:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:10:59,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:10:59,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651344150] [2022-12-14 10:10:59,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651344150] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:59,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980130310] [2022-12-14 10:10:59,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:10:59,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:59,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:10:59,967 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:10:59,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 10:11:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:11:00,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:11:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:11:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:00,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:11:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:01,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980130310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:11:01,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196061231] [2022-12-14 10:11:01,137 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 10:11:01,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:11:01,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 30 [2022-12-14 10:11:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707499543] [2022-12-14 10:11:01,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:11:01,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 10:11:01,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:11:01,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 10:11:01,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:11:01,138 INFO L87 Difference]: Start difference. First operand 34322 states and 111789 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 31 states have internal predecessors, (54), 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 10:11:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:11:33,203 INFO L93 Difference]: Finished difference Result 94592 states and 292452 transitions. [2022-12-14 10:11:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 278 states. [2022-12-14 10:11:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 31 states have internal predecessors, (54), 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 18 [2022-12-14 10:11:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:11:33,460 INFO L225 Difference]: With dead ends: 94592 [2022-12-14 10:11:33,460 INFO L226 Difference]: Without dead ends: 94342 [2022-12-14 10:11:33,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36906 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=13282, Invalid=71690, Unknown=0, NotChecked=0, Total=84972 [2022-12-14 10:11:33,464 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1302 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3988 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 4549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 3988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:11:33,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1302 Valid, 30 Invalid, 4549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 3988 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 10:11:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94342 states. [2022-12-14 10:11:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94342 to 57632. [2022-12-14 10:11:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57632 states, 57628 states have (on average 3.1813007565766642) internal successors, (183332), 57631 states have internal predecessors, (183332), 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 10:11:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57632 states to 57632 states and 183332 transitions. [2022-12-14 10:11:35,422 INFO L78 Accepts]: Start accepts. Automaton has 57632 states and 183332 transitions. Word has length 18 [2022-12-14 10:11:35,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:11:35,422 INFO L495 AbstractCegarLoop]: Abstraction has 57632 states and 183332 transitions. [2022-12-14 10:11:35,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 31 states have internal predecessors, (54), 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 10:11:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 57632 states and 183332 transitions. [2022-12-14 10:11:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 10:11:35,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:11:35,434 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:11:35,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 10:11:35,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 10:11:35,634 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:11:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:11:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1773078706, now seen corresponding path program 5 times [2022-12-14 10:11:35,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:11:35,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437095055] [2022-12-14 10:11:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:11:35,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:11:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:11:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:11:36,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:11:36,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437095055] [2022-12-14 10:11:36,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437095055] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:11:36,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41098483] [2022-12-14 10:11:36,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:11:36,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:11:36,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:11:36,076 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:11:36,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 10:11:36,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:11:36,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:11:36,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:11:36,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:11:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:11:36,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:11:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:11:36,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41098483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:11:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1003462928] [2022-12-14 10:11:36,776 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 10:11:36,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:11:36,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2022-12-14 10:11:36,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691781474] [2022-12-14 10:11:36,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:11:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:11:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:11:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:11:36,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:11:36,778 INFO L87 Difference]: Start difference. First operand 57632 states and 183332 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 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 10:11:40,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:11:40,570 INFO L93 Difference]: Finished difference Result 80750 states and 256139 transitions. [2022-12-14 10:11:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 10:11:40,571 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 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 18 [2022-12-14 10:11:40,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:11:40,829 INFO L225 Difference]: With dead ends: 80750 [2022-12-14 10:11:40,829 INFO L226 Difference]: Without dead ends: 80618 [2022-12-14 10:11:40,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2090 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1585, Invalid=6071, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 10:11:40,831 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 917 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:11:40,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 44 Invalid, 2174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 10:11:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80618 states. [2022-12-14 10:11:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80618 to 46054. [2022-12-14 10:11:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46054 states, 46050 states have (on average 3.1848208469055375) internal successors, (146661), 46053 states have internal predecessors, (146661), 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 10:11:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46054 states to 46054 states and 146661 transitions. [2022-12-14 10:11:42,375 INFO L78 Accepts]: Start accepts. Automaton has 46054 states and 146661 transitions. Word has length 18 [2022-12-14 10:11:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:11:42,375 INFO L495 AbstractCegarLoop]: Abstraction has 46054 states and 146661 transitions. [2022-12-14 10:11:42,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 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 10:11:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 46054 states and 146661 transitions. [2022-12-14 10:11:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 10:11:42,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:11:42,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:11:42,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-14 10:11:42,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 10:11:42,586 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:11:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:11:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash -9645433, now seen corresponding path program 3 times [2022-12-14 10:11:42,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:11:42,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281015107] [2022-12-14 10:11:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:11:42,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:11:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:11:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:42,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:11:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281015107] [2022-12-14 10:11:42,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281015107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:11:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641038276] [2022-12-14 10:11:42,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:11:42,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:11:42,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:11:42,951 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:11:42,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 10:11:43,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:11:43,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:11:43,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:11:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:11:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:43,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:11:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:44,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641038276] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:11:44,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2058950763] [2022-12-14 10:11:44,421 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 10:11:44,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:11:44,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-12-14 10:11:44,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007819023] [2022-12-14 10:11:44,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:11:44,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 10:11:44,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:11:44,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 10:11:44,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:11:44,423 INFO L87 Difference]: Start difference. First operand 46054 states and 146661 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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 10:12:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:12:20,324 INFO L93 Difference]: Finished difference Result 116982 states and 352123 transitions. [2022-12-14 10:12:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 315 states. [2022-12-14 10:12:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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 18 [2022-12-14 10:12:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:12:20,666 INFO L225 Difference]: With dead ends: 116982 [2022-12-14 10:12:20,666 INFO L226 Difference]: Without dead ends: 116664 [2022-12-14 10:12:20,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52105 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=16972, Invalid=87034, Unknown=0, NotChecked=0, Total=104006 [2022-12-14 10:12:20,672 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2176 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 3180 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2176 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 3180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:12:20,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2176 Valid, 38 Invalid, 3666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 3180 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 10:12:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116664 states. [2022-12-14 10:12:22,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116664 to 60082. [2022-12-14 10:12:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60082 states, 60078 states have (on average 3.1303805053430542) internal successors, (188067), 60081 states have internal predecessors, (188067), 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 10:12:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60082 states to 60082 states and 188067 transitions. [2022-12-14 10:12:22,756 INFO L78 Accepts]: Start accepts. Automaton has 60082 states and 188067 transitions. Word has length 18 [2022-12-14 10:12:22,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:12:22,756 INFO L495 AbstractCegarLoop]: Abstraction has 60082 states and 188067 transitions. [2022-12-14 10:12:22,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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 10:12:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand 60082 states and 188067 transitions. [2022-12-14 10:12:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 10:12:22,767 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:12:22,767 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:12:22,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-14 10:12:22,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 10:12:22,969 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:12:22,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:12:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1748582258, now seen corresponding path program 6 times [2022-12-14 10:12:22,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:12:22,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338703455] [2022-12-14 10:12:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:12:22,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:12:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:12:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:12:23,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:12:23,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338703455] [2022-12-14 10:12:23,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338703455] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:12:23,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921650280] [2022-12-14 10:12:23,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:12:23,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:23,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:12:23,520 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:12:23,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 10:12:23,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:12:23,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:12:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:12:23,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:12:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:12:23,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:12:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:24,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921650280] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:12:24,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [25049695] [2022-12-14 10:12:24,377 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 10:12:24,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:12:24,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 12] total 32 [2022-12-14 10:12:24,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059254613] [2022-12-14 10:12:24,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:12:24,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 10:12:24,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:12:24,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 10:12:24,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:12:24,378 INFO L87 Difference]: Start difference. First operand 60082 states and 188067 transitions. Second operand has 33 states, 32 states have (on average 1.65625) internal successors, (53), 33 states have internal predecessors, (53), 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 10:12:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:12:34,808 INFO L93 Difference]: Finished difference Result 104446 states and 323908 transitions. [2022-12-14 10:12:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-12-14 10:12:34,809 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.65625) internal successors, (53), 33 states have internal predecessors, (53), 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 18 [2022-12-14 10:12:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:12:35,124 INFO L225 Difference]: With dead ends: 104446 [2022-12-14 10:12:35,124 INFO L226 Difference]: Without dead ends: 104346 [2022-12-14 10:12:35,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8821 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=5202, Invalid=18054, Unknown=0, NotChecked=0, Total=23256 [2022-12-14 10:12:35,126 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1934 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2421 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1934 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 2421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:12:35,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1934 Valid, 16 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 2421 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 10:12:35,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104346 states. [2022-12-14 10:12:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104346 to 68496. [2022-12-14 10:12:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68496 states, 68492 states have (on average 3.134220054896922) internal successors, (214669), 68495 states have internal predecessors, (214669), 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 10:12:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68496 states to 68496 states and 214669 transitions. [2022-12-14 10:12:37,451 INFO L78 Accepts]: Start accepts. Automaton has 68496 states and 214669 transitions. Word has length 18 [2022-12-14 10:12:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:12:37,451 INFO L495 AbstractCegarLoop]: Abstraction has 68496 states and 214669 transitions. [2022-12-14 10:12:37,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.65625) internal successors, (53), 33 states have internal predecessors, (53), 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 10:12:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 68496 states and 214669 transitions. [2022-12-14 10:12:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 10:12:37,462 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:12:37,462 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:12:37,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 10:12:37,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:37,663 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:12:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:12:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1492705172, now seen corresponding path program 5 times [2022-12-14 10:12:37,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:12:37,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893958915] [2022-12-14 10:12:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:12:37,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:12:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:12:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:12:37,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:12:37,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893958915] [2022-12-14 10:12:37,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893958915] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:12:37,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403506436] [2022-12-14 10:12:37,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:12:37,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:37,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:12:37,999 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:12:38,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 10:12:38,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 10:12:38,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:12:38,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:12:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:12:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:38,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:12:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:12:38,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403506436] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:12:38,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2040774030] [2022-12-14 10:12:38,582 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 10:12:38,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:12:38,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 8] total 26 [2022-12-14 10:12:38,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352880381] [2022-12-14 10:12:38,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:12:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:12:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:12:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:12:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:12:38,584 INFO L87 Difference]: Start difference. First operand 68496 states and 214669 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 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 10:12:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:12:40,554 INFO L93 Difference]: Finished difference Result 77980 states and 244483 transitions. [2022-12-14 10:12:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 10:12:40,555 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 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 18 [2022-12-14 10:12:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:12:40,758 INFO L225 Difference]: With dead ends: 77980 [2022-12-14 10:12:40,758 INFO L226 Difference]: Without dead ends: 77906 [2022-12-14 10:12:40,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=676, Invalid=1304, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 10:12:40,759 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 597 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:12:40,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 58 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:12:40,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77906 states. [2022-12-14 10:12:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77906 to 70486. [2022-12-14 10:12:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70486 states, 70482 states have (on average 3.1344031100139045) internal successors, (220919), 70485 states have internal predecessors, (220919), 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 10:12:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70486 states to 70486 states and 220919 transitions. [2022-12-14 10:12:42,520 INFO L78 Accepts]: Start accepts. Automaton has 70486 states and 220919 transitions. Word has length 18 [2022-12-14 10:12:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:12:42,520 INFO L495 AbstractCegarLoop]: Abstraction has 70486 states and 220919 transitions. [2022-12-14 10:12:42,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 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 10:12:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 70486 states and 220919 transitions. [2022-12-14 10:12:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 10:12:42,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:12:42,537 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:12:42,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 10:12:42,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:42,738 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:12:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:12:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash 961594240, now seen corresponding path program 6 times [2022-12-14 10:12:42,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:12:42,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708212341] [2022-12-14 10:12:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:12:42,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:12:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:12:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:12:43,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:12:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708212341] [2022-12-14 10:12:43,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708212341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:12:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20170110] [2022-12-14 10:12:43,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:12:43,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:43,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:12:43,513 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:12:43,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 10:12:43,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:12:43,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:12:43,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:12:43,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:12:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:44,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:12:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:12:44,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20170110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:12:44,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [776069962] [2022-12-14 10:12:44,408 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 10:12:44,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:12:44,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 26 [2022-12-14 10:12:44,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826589791] [2022-12-14 10:12:44,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:12:44,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:12:44,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:12:44,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:12:44,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:12:44,409 INFO L87 Difference]: Start difference. First operand 70486 states and 220919 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 27 states have internal predecessors, (51), 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 10:12:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:12:47,701 INFO L93 Difference]: Finished difference Result 87882 states and 274771 transitions. [2022-12-14 10:12:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 10:12:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 27 states have internal predecessors, (51), 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 18 [2022-12-14 10:12:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:12:47,955 INFO L225 Difference]: With dead ends: 87882 [2022-12-14 10:12:47,955 INFO L226 Difference]: Without dead ends: 87798 [2022-12-14 10:12:47,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1266, Invalid=3290, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 10:12:47,956 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 990 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:12:47,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 13 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:12:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87798 states. [2022-12-14 10:12:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87798 to 75512. [2022-12-14 10:12:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75512 states, 75508 states have (on average 3.1215632780632516) internal successors, (235703), 75511 states have internal predecessors, (235703), 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 10:12:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75512 states to 75512 states and 235703 transitions. [2022-12-14 10:12:49,996 INFO L78 Accepts]: Start accepts. Automaton has 75512 states and 235703 transitions. Word has length 18 [2022-12-14 10:12:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:12:49,997 INFO L495 AbstractCegarLoop]: Abstraction has 75512 states and 235703 transitions. [2022-12-14 10:12:49,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 27 states have internal predecessors, (51), 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 10:12:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 75512 states and 235703 transitions. [2022-12-14 10:12:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 10:12:50,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:12:50,019 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:12:50,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 10:12:50,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:50,220 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:12:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:12:50,223 INFO L85 PathProgramCache]: Analyzing trace with hash -608914987, now seen corresponding path program 4 times [2022-12-14 10:12:50,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:12:50,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180953021] [2022-12-14 10:12:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:12:50,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:12:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:12:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:50,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:12:50,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180953021] [2022-12-14 10:12:50,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180953021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:12:50,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113128678] [2022-12-14 10:12:50,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:12:50,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:50,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:12:50,820 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:12:50,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 10:12:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:12:50,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 10:12:50,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:12:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:51,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:12:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:51,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113128678] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:12:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197609427] [2022-12-14 10:12:51,850 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 10:12:51,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:12:51,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2022-12-14 10:12:51,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389201620] [2022-12-14 10:12:51,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:12:51,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 10:12:51,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:12:51,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 10:12:51,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:12:51,852 INFO L87 Difference]: Start difference. First operand 75512 states and 235703 transitions. Second operand has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 34 states have internal predecessors, (48), 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 10:13:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:13:07,102 INFO L93 Difference]: Finished difference Result 133112 states and 420722 transitions. [2022-12-14 10:13:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-12-14 10:13:07,103 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 34 states have internal predecessors, (48), 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 18 [2022-12-14 10:13:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:13:07,613 INFO L225 Difference]: With dead ends: 133112 [2022-12-14 10:13:07,613 INFO L226 Difference]: Without dead ends: 132970 [2022-12-14 10:13:07,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17763 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=8118, Invalid=34112, Unknown=0, NotChecked=0, Total=42230 [2022-12-14 10:13:07,615 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1262 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 3539 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 3920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 3539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:13:07,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 36 Invalid, 3920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 3539 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 10:13:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132970 states. [2022-12-14 10:13:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132970 to 106708. [2022-12-14 10:13:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106708 states, 106704 states have (on average 3.145158569500675) internal successors, (335601), 106707 states have internal predecessors, (335601), 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 10:13:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106708 states to 106708 states and 335601 transitions. [2022-12-14 10:13:10,999 INFO L78 Accepts]: Start accepts. Automaton has 106708 states and 335601 transitions. Word has length 18 [2022-12-14 10:13:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:13:10,999 INFO L495 AbstractCegarLoop]: Abstraction has 106708 states and 335601 transitions. [2022-12-14 10:13:10,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 34 states have internal predecessors, (48), 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 10:13:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 106708 states and 335601 transitions. [2022-12-14 10:13:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:13:11,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:13:11,034 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:13:11,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 10:13:11,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 10:13:11,235 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:13:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:13:11,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1539853765, now seen corresponding path program 5 times [2022-12-14 10:13:11,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:13:11,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346777935] [2022-12-14 10:13:11,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:13:11,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:13:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:13:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:13:11,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:13:11,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346777935] [2022-12-14 10:13:11,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346777935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:13:11,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923348898] [2022-12-14 10:13:11,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:13:11,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:13:11,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:13:11,480 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:13:11,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 10:13:11,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:13:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:13:11,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 10:13:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:13:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:13:11,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:13:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:13:12,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923348898] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:13:12,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121748040] [2022-12-14 10:13:12,043 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 10:13:12,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:13:12,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 8] total 28 [2022-12-14 10:13:12,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930745387] [2022-12-14 10:13:12,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:13:12,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 10:13:12,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:13:12,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 10:13:12,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-12-14 10:13:12,044 INFO L87 Difference]: Start difference. First operand 106708 states and 335601 transitions. Second operand has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 10:13:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:13:14,442 INFO L93 Difference]: Finished difference Result 121684 states and 382679 transitions. [2022-12-14 10:13:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 10:13:14,443 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 20 [2022-12-14 10:13:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:13:14,825 INFO L225 Difference]: With dead ends: 121684 [2022-12-14 10:13:14,825 INFO L226 Difference]: Without dead ends: 121644 [2022-12-14 10:13:14,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=985, Invalid=1877, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 10:13:14,826 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 655 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:13:14,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 84 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:13:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121644 states. [2022-12-14 10:13:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121644 to 116282. [2022-12-14 10:13:17,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116282 states, 116278 states have (on average 3.1465539482963245) internal successors, (365875), 116281 states have internal predecessors, (365875), 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 10:13:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116282 states to 116282 states and 365875 transitions. [2022-12-14 10:13:18,229 INFO L78 Accepts]: Start accepts. Automaton has 116282 states and 365875 transitions. Word has length 20 [2022-12-14 10:13:18,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:13:18,229 INFO L495 AbstractCegarLoop]: Abstraction has 116282 states and 365875 transitions. [2022-12-14 10:13:18,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 10:13:18,229 INFO L276 IsEmpty]: Start isEmpty. Operand 116282 states and 365875 transitions. [2022-12-14 10:13:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:13:18,394 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:13:18,394 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:13:18,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 10:13:18,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 10:13:18,595 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:13:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:13:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1539911425, now seen corresponding path program 6 times [2022-12-14 10:13:18,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:13:18,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260386419] [2022-12-14 10:13:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:13:18,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:13:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:13:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:13:18,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:13:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260386419] [2022-12-14 10:13:18,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260386419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:13:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287596662] [2022-12-14 10:13:18,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:13:18,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:13:18,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:13:18,965 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:13:18,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 10:13:19,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:13:19,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:13:19,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:13:19,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:13:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:13:19,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:13:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:13:20,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287596662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:13:20,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1903789184] [2022-12-14 10:13:20,274 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 10:13:20,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:13:20,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 29 [2022-12-14 10:13:20,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973607040] [2022-12-14 10:13:20,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:13:20,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 10:13:20,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:13:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 10:13:20,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:13:20,276 INFO L87 Difference]: Start difference. First operand 116282 states and 365875 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 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 10:14:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:14:13,032 INFO L93 Difference]: Finished difference Result 282368 states and 864391 transitions. [2022-12-14 10:14:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2022-12-14 10:14:13,033 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 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 20 [2022-12-14 10:14:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:14:14,023 INFO L225 Difference]: With dead ends: 282368 [2022-12-14 10:14:14,023 INFO L226 Difference]: Without dead ends: 281980 [2022-12-14 10:14:14,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52833 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=13925, Invalid=101335, Unknown=0, NotChecked=0, Total=115260 [2022-12-14 10:14:14,028 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1996 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:14:14,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1996 Valid, 28 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 10:14:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281980 states. [2022-12-14 10:14:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281980 to 165062. [2022-12-14 10:14:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165062 states, 165058 states have (on average 3.1537641313962363) internal successors, (520554), 165061 states have internal predecessors, (520554), 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 10:14:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165062 states to 165062 states and 520554 transitions. [2022-12-14 10:14:21,417 INFO L78 Accepts]: Start accepts. Automaton has 165062 states and 520554 transitions. Word has length 20 [2022-12-14 10:14:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:14:21,417 INFO L495 AbstractCegarLoop]: Abstraction has 165062 states and 520554 transitions. [2022-12-14 10:14:21,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 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 10:14:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 165062 states and 520554 transitions. [2022-12-14 10:14:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:14:21,467 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:14:21,467 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:14:21,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 10:14:21,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:14:21,669 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:14:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:14:21,670 INFO L85 PathProgramCache]: Analyzing trace with hash -492221312, now seen corresponding path program 7 times [2022-12-14 10:14:21,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:14:21,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328886605] [2022-12-14 10:14:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:14:21,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:14:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:14:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:14:22,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:14:22,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328886605] [2022-12-14 10:14:22,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328886605] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:14:22,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353220584] [2022-12-14 10:14:22,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:14:22,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:14:22,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:14:22,290 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:14:22,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 10:14:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:14:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 10:14:22,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:14:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:14:22,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:14:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:14:23,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353220584] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:14:23,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1478937394] [2022-12-14 10:14:23,360 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 10:14:23,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:14:23,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 38 [2022-12-14 10:14:23,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250688716] [2022-12-14 10:14:23,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:14:23,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 10:14:23,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:14:23,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 10:14:23,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 10:14:23,361 INFO L87 Difference]: Start difference. First operand 165062 states and 520554 transitions. Second operand has 40 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 39 states have internal predecessors, (60), 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 10:15:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:15:13,450 INFO L93 Difference]: Finished difference Result 339558 states and 1064809 transitions. [2022-12-14 10:15:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 506 states. [2022-12-14 10:15:13,451 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 39 states have internal predecessors, (60), 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 20 [2022-12-14 10:15:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:15:14,909 INFO L225 Difference]: With dead ends: 339558 [2022-12-14 10:15:14,909 INFO L226 Difference]: Without dead ends: 339272 [2022-12-14 10:15:14,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133473 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=36586, Invalid=234334, Unknown=0, NotChecked=0, Total=270920 [2022-12-14 10:15:14,921 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4017 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 4123 mSolverCounterSat, 1267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4017 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1267 IncrementalHoareTripleChecker+Valid, 4123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:15:14,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4017 Valid, 44 Invalid, 5390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1267 Valid, 4123 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 10:15:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339272 states. [2022-12-14 10:15:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339272 to 226600. [2022-12-14 10:15:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226600 states, 226596 states have (on average 3.129353563169694) internal successors, (709099), 226599 states have internal predecessors, (709099), 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 10:15:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226600 states to 226600 states and 709099 transitions. [2022-12-14 10:15:24,721 INFO L78 Accepts]: Start accepts. Automaton has 226600 states and 709099 transitions. Word has length 20 [2022-12-14 10:15:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:15:24,722 INFO L495 AbstractCegarLoop]: Abstraction has 226600 states and 709099 transitions. [2022-12-14 10:15:24,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 39 states have internal predecessors, (60), 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 10:15:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 226600 states and 709099 transitions. [2022-12-14 10:15:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:15:24,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:15:24,763 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:15:24,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 10:15:24,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 10:15:24,965 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:15:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:15:24,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1700881333, now seen corresponding path program 6 times [2022-12-14 10:15:24,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:15:24,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203368606] [2022-12-14 10:15:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:15:24,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:15:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:15:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:15:25,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:15:25,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203368606] [2022-12-14 10:15:25,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203368606] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:15:25,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859959560] [2022-12-14 10:15:25,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:15:25,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:15:25,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:15:25,297 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:15:25,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 10:15:25,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:15:25,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:15:25,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 10:15:25,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:15:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:15:25,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:15:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:15:26,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859959560] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:15:26,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [934934177] [2022-12-14 10:15:26,239 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 10:15:26,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:15:26,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 14] total 34 [2022-12-14 10:15:26,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214463766] [2022-12-14 10:15:26,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:15:26,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 10:15:26,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:15:26,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 10:15:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:15:26,241 INFO L87 Difference]: Start difference. First operand 226600 states and 709099 transitions. Second operand has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 35 states have internal predecessors, (58), 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 10:15:36,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:15:36,089 INFO L93 Difference]: Finished difference Result 274078 states and 853415 transitions. [2022-12-14 10:15:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-12-14 10:15:36,089 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 35 states have internal predecessors, (58), 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 20 [2022-12-14 10:15:36,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:15:37,118 INFO L225 Difference]: With dead ends: 274078 [2022-12-14 10:15:37,118 INFO L226 Difference]: Without dead ends: 273862 [2022-12-14 10:15:37,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7568 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4890, Invalid=15416, Unknown=0, NotChecked=0, Total=20306 [2022-12-14 10:15:37,119 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1412 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 3181 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 3532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 3181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:15:37,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1412 Valid, 11 Invalid, 3532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 3181 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 10:15:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273862 states. [2022-12-14 10:15:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273862 to 240352. [2022-12-14 10:15:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240352 states, 240348 states have (on average 3.1233877544227537) internal successors, (750700), 240351 states have internal predecessors, (750700), 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 10:15:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240352 states to 240352 states and 750700 transitions. [2022-12-14 10:15:45,777 INFO L78 Accepts]: Start accepts. Automaton has 240352 states and 750700 transitions. Word has length 20 [2022-12-14 10:15:45,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:15:45,777 INFO L495 AbstractCegarLoop]: Abstraction has 240352 states and 750700 transitions. [2022-12-14 10:15:45,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 35 states have internal predecessors, (58), 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 10:15:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 240352 states and 750700 transitions. [2022-12-14 10:15:45,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:15:45,825 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:15:45,825 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:15:45,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 10:15:46,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 10:15:46,026 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:15:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:15:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1707137443, now seen corresponding path program 7 times [2022-12-14 10:15:46,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:15:46,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705050417] [2022-12-14 10:15:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:15:46,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:15:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:15:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:15:46,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:15:46,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705050417] [2022-12-14 10:15:46,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705050417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:15:46,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685390976] [2022-12-14 10:15:46,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:15:46,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:15:46,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:15:46,336 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:15:46,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 10:15:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:15:46,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 10:15:46,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:15:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:15:46,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:15:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:15:47,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685390976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:15:47,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1738392159] [2022-12-14 10:15:47,206 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 10:15:47,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:15:47,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 8] total 28 [2022-12-14 10:15:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777111048] [2022-12-14 10:15:47,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:15:47,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 10:15:47,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:15:47,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 10:15:47,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2022-12-14 10:15:47,208 INFO L87 Difference]: Start difference. First operand 240352 states and 750700 transitions. Second operand has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 10:15:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:15:50,637 INFO L93 Difference]: Finished difference Result 258312 states and 805231 transitions. [2022-12-14 10:15:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 10:15:50,638 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 20 [2022-12-14 10:15:50,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:15:51,484 INFO L225 Difference]: With dead ends: 258312 [2022-12-14 10:15:51,485 INFO L226 Difference]: Without dead ends: 258214 [2022-12-14 10:15:51,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=951, Invalid=1805, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 10:15:51,485 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 822 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:15:51,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 39 Invalid, 2425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:15:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258214 states. [2022-12-14 10:15:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258214 to 241986. [2022-12-14 10:15:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241986 states, 241982 states have (on average 3.12186030365895) internal successors, (755434), 241985 states have internal predecessors, (755434), 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 10:16:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241986 states to 241986 states and 755434 transitions. [2022-12-14 10:16:00,070 INFO L78 Accepts]: Start accepts. Automaton has 241986 states and 755434 transitions. Word has length 20 [2022-12-14 10:16:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:16:00,070 INFO L495 AbstractCegarLoop]: Abstraction has 241986 states and 755434 transitions. [2022-12-14 10:16:00,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 10:16:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 241986 states and 755434 transitions. [2022-12-14 10:16:00,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:16:00,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:16:00,134 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:16:00,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 10:16:00,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 10:16:00,335 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:16:00,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:16:00,337 INFO L85 PathProgramCache]: Analyzing trace with hash -236899409, now seen corresponding path program 8 times [2022-12-14 10:16:00,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:16:00,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477189835] [2022-12-14 10:16:00,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:00,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:16:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:16:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:00,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:16:00,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477189835] [2022-12-14 10:16:00,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477189835] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:16:00,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386537675] [2022-12-14 10:16:00,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:16:00,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:00,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:16:00,890 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:16:00,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 10:16:00,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 10:16:00,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:16:00,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 10:16:00,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:16:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:01,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:16:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:01,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386537675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:16:01,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49821355] [2022-12-14 10:16:01,816 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 10:16:01,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:16:01,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 37 [2022-12-14 10:16:01,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313657333] [2022-12-14 10:16:01,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:16:01,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 10:16:01,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:16:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 10:16:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 10:16:01,817 INFO L87 Difference]: Start difference. First operand 241986 states and 755434 transitions. Second operand has 39 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 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 10:16:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:16:12,588 INFO L93 Difference]: Finished difference Result 439166 states and 1384761 transitions. [2022-12-14 10:16:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-12-14 10:16:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 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 20 [2022-12-14 10:16:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:16:14,280 INFO L225 Difference]: With dead ends: 439166 [2022-12-14 10:16:14,280 INFO L226 Difference]: Without dead ends: 439028 [2022-12-14 10:16:14,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7981 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=5047, Invalid=12245, Unknown=0, NotChecked=0, Total=17292 [2022-12-14 10:16:14,282 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1414 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:16:14,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1414 Valid, 87 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 2881 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 10:16:14,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439028 states. [2022-12-14 10:16:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439028 to 333218. [2022-12-14 10:16:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333218 states, 333214 states have (on average 3.135147382763029) internal successors, (1044675), 333217 states have internal predecessors, (1044675), 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 10:16:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333218 states to 333218 states and 1044675 transitions. [2022-12-14 10:16:29,263 INFO L78 Accepts]: Start accepts. Automaton has 333218 states and 1044675 transitions. Word has length 20 [2022-12-14 10:16:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:16:29,263 INFO L495 AbstractCegarLoop]: Abstraction has 333218 states and 1044675 transitions. [2022-12-14 10:16:29,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 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 10:16:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 333218 states and 1044675 transitions. [2022-12-14 10:16:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:16:29,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:16:29,316 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:16:29,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-14 10:16:29,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 10:16:29,517 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:16:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:16:29,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2071863109, now seen corresponding path program 7 times [2022-12-14 10:16:29,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:16:29,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029968968] [2022-12-14 10:16:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:29,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:16:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:16:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:29,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:16:29,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029968968] [2022-12-14 10:16:29,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029968968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:16:29,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394203208] [2022-12-14 10:16:29,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:16:29,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:29,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:16:29,931 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:16:29,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 10:16:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:16:30,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 10:16:30,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:16:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:30,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:16:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:30,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394203208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:16:30,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616624915] [2022-12-14 10:16:30,928 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 10:16:30,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:16:30,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 38 [2022-12-14 10:16:30,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375101840] [2022-12-14 10:16:30,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:16:30,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 10:16:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:16:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 10:16:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1057, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 10:16:30,929 INFO L87 Difference]: Start difference. First operand 333218 states and 1044675 transitions. Second operand has 40 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 39 states have internal predecessors, (60), 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 10:16:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:16:49,004 INFO L93 Difference]: Finished difference Result 548104 states and 1671627 transitions. [2022-12-14 10:16:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-12-14 10:16:49,005 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 39 states have internal predecessors, (60), 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 20 [2022-12-14 10:16:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:16:51,121 INFO L225 Difference]: With dead ends: 548104 [2022-12-14 10:16:51,121 INFO L226 Difference]: Without dead ends: 547912 [2022-12-14 10:16:51,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19771 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=10515, Invalid=31715, Unknown=0, NotChecked=0, Total=42230 [2022-12-14 10:16:51,123 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1417 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 3058 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1417 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 3058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:16:51,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1417 Valid, 32 Invalid, 3383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 3058 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 10:16:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547912 states. [2022-12-14 10:17:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547912 to 366562. [2022-12-14 10:17:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366562 states, 366558 states have (on average 3.1198691612241447) internal successors, (1143613), 366561 states have internal predecessors, (1143613), 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 10:17:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366562 states to 366562 states and 1143613 transitions. [2022-12-14 10:17:08,305 INFO L78 Accepts]: Start accepts. Automaton has 366562 states and 1143613 transitions. Word has length 20 [2022-12-14 10:17:08,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:17:08,305 INFO L495 AbstractCegarLoop]: Abstraction has 366562 states and 1143613 transitions. [2022-12-14 10:17:08,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 39 states have internal predecessors, (60), 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 10:17:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 366562 states and 1143613 transitions. [2022-12-14 10:17:08,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:17:08,355 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:17:08,355 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:17:08,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 10:17:08,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 10:17:08,556 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:17:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:17:08,557 INFO L85 PathProgramCache]: Analyzing trace with hash -637881421, now seen corresponding path program 7 times [2022-12-14 10:17:08,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:17:08,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752391042] [2022-12-14 10:17:08,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:17:08,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:17:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:17:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:17:08,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:17:08,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752391042] [2022-12-14 10:17:08,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752391042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:17:08,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177489568] [2022-12-14 10:17:08,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:17:08,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:17:08,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:17:08,940 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:17:08,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 10:17:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:17:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:17:09,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:17:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:17:09,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:17:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:17:10,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177489568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:17:10,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638951912] [2022-12-14 10:17:10,907 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 10:17:10,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:17:10,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2022-12-14 10:17:10,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73187867] [2022-12-14 10:17:10,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:17:10,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 10:17:10,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:17:10,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 10:17:10,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:17:10,909 INFO L87 Difference]: Start difference. First operand 366562 states and 1143613 transitions. Second operand has 33 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 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 10:19:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:41,017 INFO L93 Difference]: Finished difference Result 768840 states and 2314440 transitions. [2022-12-14 10:19:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 780 states. [2022-12-14 10:19:41,018 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 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 20 [2022-12-14 10:19:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:43,925 INFO L225 Difference]: With dead ends: 768840 [2022-12-14 10:19:43,925 INFO L226 Difference]: Without dead ends: 768046 [2022-12-14 10:19:43,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 787 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320384 ImplicationChecksByTransitivity, 139.5s TimeCoverageRelationStatistics Valid=77744, Invalid=543988, Unknown=0, NotChecked=0, Total=621732 [2022-12-14 10:19:43,953 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2981 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 6559 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2981 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 6559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:43,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2981 Valid, 38 Invalid, 7377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 6559 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-12-14 10:19:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768046 states. [2022-12-14 10:20:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768046 to 475624. [2022-12-14 10:20:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475624 states, 475620 states have (on average 3.109587485807998) internal successors, (1478982), 475623 states have internal predecessors, (1478982), 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 10:20:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475624 states to 475624 states and 1478982 transitions. [2022-12-14 10:20:08,634 INFO L78 Accepts]: Start accepts. Automaton has 475624 states and 1478982 transitions. Word has length 20 [2022-12-14 10:20:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:20:08,634 INFO L495 AbstractCegarLoop]: Abstraction has 475624 states and 1478982 transitions. [2022-12-14 10:20:08,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 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 10:20:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 475624 states and 1478982 transitions. [2022-12-14 10:20:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:20:08,693 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:20:08,693 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:20:08,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 10:20:08,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-14 10:20:08,895 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:20:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:20:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash -232021955, now seen corresponding path program 9 times [2022-12-14 10:20:08,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:20:08,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000837815] [2022-12-14 10:20:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:08,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:20:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:20:09,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:20:09,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000837815] [2022-12-14 10:20:09,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000837815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:20:09,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791858731] [2022-12-14 10:20:09,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:20:09,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:09,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:20:09,470 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:20:09,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 10:20:09,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:20:09,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:20:09,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 10:20:09,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:20:09,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:20:10,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791858731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:20:10,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [106417801] [2022-12-14 10:20:10,396 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 10:20:10,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:20:10,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 37 [2022-12-14 10:20:10,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511110611] [2022-12-14 10:20:10,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:20:10,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 10:20:10,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:20:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 10:20:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 10:20:10,397 INFO L87 Difference]: Start difference. First operand 475624 states and 1478982 transitions. Second operand has 38 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 38 states have internal predecessors, (52), 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 10:20:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:20:21,742 INFO L93 Difference]: Finished difference Result 690730 states and 2144365 transitions. [2022-12-14 10:20:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-12-14 10:20:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 38 states have internal predecessors, (52), 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 20 [2022-12-14 10:20:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:20:24,822 INFO L225 Difference]: With dead ends: 690730 [2022-12-14 10:20:24,822 INFO L226 Difference]: Without dead ends: 690552 [2022-12-14 10:20:24,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7113 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4808, Invalid=14652, Unknown=0, NotChecked=0, Total=19460 [2022-12-14 10:20:24,824 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1938 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2822 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1938 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 2822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:20:24,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1938 Valid, 35 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 2822 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 10:20:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690552 states. [2022-12-14 10:20:46,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690552 to 626934. [2022-12-14 10:20:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626934 states, 626930 states have (on average 3.088196449364363) internal successors, (1936083), 626933 states have internal predecessors, (1936083), 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 10:20:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626934 states to 626934 states and 1936083 transitions. [2022-12-14 10:20:49,960 INFO L78 Accepts]: Start accepts. Automaton has 626934 states and 1936083 transitions. Word has length 20 [2022-12-14 10:20:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:20:49,960 INFO L495 AbstractCegarLoop]: Abstraction has 626934 states and 1936083 transitions. [2022-12-14 10:20:49,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 38 states have internal predecessors, (52), 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 10:20:49,961 INFO L276 IsEmpty]: Start isEmpty. Operand 626934 states and 1936083 transitions. [2022-12-14 10:20:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:20:50,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:20:50,069 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:20:50,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 10:20:50,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:50,270 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-12-14 10:20:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:20:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1070919093, now seen corresponding path program 10 times [2022-12-14 10:20:50,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:20:50,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748463468] [2022-12-14 10:20:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:50,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:20:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:20:50,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:20:50,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748463468] [2022-12-14 10:20:50,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748463468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:20:50,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675402632] [2022-12-14 10:20:50,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:20:50,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:50,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:20:50,717 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:20:50,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88350f1a-7060-4137-961f-dd1c41a1c1e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 10:20:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:50,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 10:20:50,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:20:51,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:20:51,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675402632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:20:51,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137024584] [2022-12-14 10:20:51,288 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 10:20:51,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:20:51,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 8] total 28 [2022-12-14 10:20:51,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419730048] [2022-12-14 10:20:51,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:20:51,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 10:20:51,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:20:51,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 10:20:51,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2022-12-14 10:20:51,290 INFO L87 Difference]: Start difference. First operand 626934 states and 1936083 transitions. Second operand has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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)