./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b 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_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9 --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 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 --- 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-6b4ec56 [2022-11-20 21:31:00,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:31:00,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:31:00,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:31:00,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:31:00,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:31:00,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:31:00,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:31:00,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:31:00,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:31:00,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:31:00,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:31:00,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:31:00,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:31:00,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:31:00,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:31:00,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:31:00,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:31:00,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:31:00,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:31:00,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:31:00,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:31:00,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:31:00,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:31:00,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:31:00,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:31:00,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:31:00,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:31:00,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:31:00,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:31:00,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:31:00,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:31:00,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:31:00,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:31:00,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:31:00,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:31:00,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:31:00,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:31:00,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:31:00,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:31:00,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:31:00,980 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-20 21:31:01,025 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:31:01,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:31:01,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:31:01,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:31:01,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:31:01,028 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:31:01,028 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:31:01,028 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:31:01,028 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:31:01,029 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:31:01,030 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:31:01,030 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:31:01,030 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:31:01,030 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:31:01,031 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:31:01,031 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:31:01,031 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:31:01,031 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:31:01,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:31:01,032 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:31:01,033 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:31:01,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:31:01,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:31:01,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:31:01,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:31:01,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:31:01,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:31:01,035 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 21:31:01,035 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:31:01,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:31:01,036 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:31:01,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:31:01,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:31:01,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:31:01,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:31:01,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:31:01,037 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:31:01,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:31:01,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:31:01,038 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:31:01,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:31:01,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:31:01,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:31:01,039 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_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 [2022-11-20 21:31:01,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:31:01,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:31:01,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:31:01,364 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:31:01,364 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:31:01,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-11-20 21:31:04,422 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:31:04,620 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:31:04,621 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-11-20 21:31:04,628 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/data/0e3f26073/4d6485e8d82f475b86399f0efaf0bd41/FLAG887cb3a0f [2022-11-20 21:31:04,642 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/data/0e3f26073/4d6485e8d82f475b86399f0efaf0bd41 [2022-11-20 21:31:04,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:31:04,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:31:04,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:31:04,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:31:04,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:31:04,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:04,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@94af57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04, skipping insertion in model container [2022-11-20 21:31:04,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:04,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:31:04,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:31:04,874 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_4383be42-fe68-465b-8311-10eede42f58b/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-11-20 21:31:04,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:31:04,893 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:31:04,927 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_4383be42-fe68-465b-8311-10eede42f58b/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-11-20 21:31:04,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:31:04,953 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:31:04,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04 WrapperNode [2022-11-20 21:31:04,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:31:04,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:31:04,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:31:04,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:31:04,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:04,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:05,032 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 206 [2022-11-20 21:31:05,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:31:05,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:31:05,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:31:05,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:31:05,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:05,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:05,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:05,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:05,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:05,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:05,122 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:05,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:05,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:31:05,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:31:05,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:31:05,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:31:05,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (1/1) ... [2022-11-20 21:31:05,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:31:05,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:05,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:31:05,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:31:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:31:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 21:31:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 21:31:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 21:31:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 21:31:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 21:31:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 21:31:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 21:31:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 21:31:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 21:31:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:31:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:31:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:31:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:31:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:31:05,228 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 21:31:05,394 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:31:05,397 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:31:06,104 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:31:06,139 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:31:06,140 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-20 21:31:06,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:31:06 BoogieIcfgContainer [2022-11-20 21:31:06,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:31:06,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:31:06,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:31:06,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:31:06,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:31:04" (1/3) ... [2022-11-20 21:31:06,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da4c87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:31:06, skipping insertion in model container [2022-11-20 21:31:06,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:04" (2/3) ... [2022-11-20 21:31:06,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da4c87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:31:06, skipping insertion in model container [2022-11-20 21:31:06,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:31:06" (3/3) ... [2022-11-20 21:31:06,154 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2022-11-20 21:31:06,176 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 21:31:06,188 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:31:06,188 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-20 21:31:06,189 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 21:31:06,297 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 21:31:06,341 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 21:31:06,360 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 315 places, 335 transitions, 686 flow [2022-11-20 21:31:06,363 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 315 places, 335 transitions, 686 flow [2022-11-20 21:31:06,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 335 transitions, 686 flow [2022-11-20 21:31:06,513 INFO L130 PetriNetUnfolder]: 27/333 cut-off events. [2022-11-20 21:31:06,515 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 21:31:06,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 333 events. 27/333 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 455 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2022-11-20 21:31:06,528 INFO L119 LiptonReduction]: Number of co-enabled transitions 1916 [2022-11-20 21:31:50,310 INFO L134 LiptonReduction]: Checked pairs total: 4017 [2022-11-20 21:31:50,310 INFO L136 LiptonReduction]: Total number of compositions: 404 [2022-11-20 21:31:50,319 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 56 transitions, 128 flow [2022-11-20 21:31:50,356 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 231 states, 189 states have (on average 2.8624338624338623) internal successors, (541), 230 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:50,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:31:50,382 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;@689461c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:31:50,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-20 21:31:50,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 189 states have (on average 2.8624338624338623) internal successors, (541), 230 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-20 21:31:50,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:50,391 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-20 21:31:50,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:50,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1272, now seen corresponding path program 1 times [2022-11-20 21:31:50,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:50,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471260965] [2022-11-20 21:31:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:50,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:50,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471260965] [2022-11-20 21:31:50,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471260965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:31:50,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:31:50,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-20 21:31:50,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146760306] [2022-11-20 21:31:50,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:31:50,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 21:31:50,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:50,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 21:31:50,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 21:31:50,555 INFO L87 Difference]: Start difference. First operand has 231 states, 189 states have (on average 2.8624338624338623) internal successors, (541), 230 states have internal predecessors, (541), 0 states have call successors, (0), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:50,731 INFO L93 Difference]: Finished difference Result 225 states and 535 transitions. [2022-11-20 21:31:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 21:31:50,734 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2022-11-20 21:31:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:50,756 INFO L225 Difference]: With dead ends: 225 [2022-11-20 21:31:50,756 INFO L226 Difference]: Without dead ends: 225 [2022-11-20 21:31:50,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 21:31:50,763 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:50,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:31:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-20 21:31:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-11-20 21:31:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 189 states have (on average 2.8306878306878307) internal successors, (535), 224 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 535 transitions. [2022-11-20 21:31:50,860 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 535 transitions. Word has length 1 [2022-11-20 21:31:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:50,861 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 535 transitions. [2022-11-20 21:31:50,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 535 transitions. [2022-11-20 21:31:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 21:31:50,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:50,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 21:31:50,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:31:50,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash 40807, now seen corresponding path program 1 times [2022-11-20 21:31:50,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:50,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898219632] [2022-11-20 21:31:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:50,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:50,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:50,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560313954] [2022-11-20 21:31:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:50,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:50,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:50,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:50,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:31:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:51,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:31:51,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:51,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:31:51,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:51,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898219632] [2022-11-20 21:31:51,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:51,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560313954] [2022-11-20 21:31:51,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560313954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:31:51,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:31:51,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:31:51,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112584059] [2022-11-20 21:31:51,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:31:51,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:31:51,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:31:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:51,054 INFO L87 Difference]: Start difference. First operand 225 states and 535 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:51,259 INFO L93 Difference]: Finished difference Result 443 states and 1066 transitions. [2022-11-20 21:31:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:31:51,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 21:31:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:51,264 INFO L225 Difference]: With dead ends: 443 [2022-11-20 21:31:51,264 INFO L226 Difference]: Without dead ends: 443 [2022-11-20 21:31:51,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:51,266 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:51,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 4 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:31:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-20 21:31:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 228. [2022-11-20 21:31:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 192 states have (on average 2.84375) internal successors, (546), 227 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 546 transitions. [2022-11-20 21:31:51,293 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 546 transitions. Word has length 2 [2022-11-20 21:31:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:51,294 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 546 transitions. [2022-11-20 21:31:51,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 546 transitions. [2022-11-20 21:31:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 21:31:51,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:51,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 21:31:51,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:31:51,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:51,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:51,503 INFO L85 PathProgramCache]: Analyzing trace with hash 40808, now seen corresponding path program 1 times [2022-11-20 21:31:51,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:51,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652826067] [2022-11-20 21:31:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:51,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:51,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:51,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344405224] [2022-11-20 21:31:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:51,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:51,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:51,516 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:51,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:31:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:51,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:31:51,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:51,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:31:51,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:51,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652826067] [2022-11-20 21:31:51,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:51,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344405224] [2022-11-20 21:31:51,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344405224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:31:51,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:31:51,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:31:51,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757897203] [2022-11-20 21:31:51,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:31:51,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:31:51,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:31:51,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:51,623 INFO L87 Difference]: Start difference. First operand 228 states and 546 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:51,725 INFO L93 Difference]: Finished difference Result 225 states and 540 transitions. [2022-11-20 21:31:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:31:51,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 21:31:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:51,727 INFO L225 Difference]: With dead ends: 225 [2022-11-20 21:31:51,727 INFO L226 Difference]: Without dead ends: 225 [2022-11-20 21:31:51,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:51,729 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:51,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:31:51,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-20 21:31:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-11-20 21:31:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 192 states have (on average 2.8125) internal successors, (540), 224 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 540 transitions. [2022-11-20 21:31:51,741 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 540 transitions. Word has length 2 [2022-11-20 21:31:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:51,742 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 540 transitions. [2022-11-20 21:31:51,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 540 transitions. [2022-11-20 21:31:51,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 21:31:51,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:51,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 21:31:51,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 21:31:51,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:51,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1266175, now seen corresponding path program 1 times [2022-11-20 21:31:51,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:51,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917971362] [2022-11-20 21:31:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:51,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:51,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:51,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478712895] [2022-11-20 21:31:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:51,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:51,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:51,965 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:51,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:31:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:52,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:31:52,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:52,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:31:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:52,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:52,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917971362] [2022-11-20 21:31:52,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:52,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478712895] [2022-11-20 21:31:52,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478712895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:31:52,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730847892] [2022-11-20 21:31:52,139 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:31:52,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:31:52,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 21:31:52,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785753718] [2022-11-20 21:31:52,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:31:52,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:31:52,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:52,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:31:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:31:52,160 INFO L87 Difference]: Start difference. First operand 225 states and 540 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:52,637 INFO L93 Difference]: Finished difference Result 1094 states and 2644 transitions. [2022-11-20 21:31:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:31:52,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 21:31:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:52,646 INFO L225 Difference]: With dead ends: 1094 [2022-11-20 21:31:52,646 INFO L226 Difference]: Without dead ends: 1094 [2022-11-20 21:31:52,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:31:52,648 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 210 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:52,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 10 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:31:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-11-20 21:31:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 234. [2022-11-20 21:31:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 201 states have (on average 2.8059701492537314) internal successors, (564), 233 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 564 transitions. [2022-11-20 21:31:52,670 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 564 transitions. Word has length 3 [2022-11-20 21:31:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:52,670 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 564 transitions. [2022-11-20 21:31:52,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 564 transitions. [2022-11-20 21:31:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 21:31:52,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:52,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 21:31:52,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:31:52,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:52,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:52,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:52,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1218005964, now seen corresponding path program 1 times [2022-11-20 21:31:52,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:52,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048702285] [2022-11-20 21:31:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:52,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:52,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:52,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342890807] [2022-11-20 21:31:52,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:52,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:52,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:52,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:52,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:31:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:53,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:31:53,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:53,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:31:53,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:53,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048702285] [2022-11-20 21:31:53,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:53,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342890807] [2022-11-20 21:31:53,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342890807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:31:53,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:31:53,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:31:53,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144304658] [2022-11-20 21:31:53,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:31:53,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:31:53,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:53,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:31:53,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:53,029 INFO L87 Difference]: Start difference. First operand 234 states and 564 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:53,171 INFO L93 Difference]: Finished difference Result 233 states and 559 transitions. [2022-11-20 21:31:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:31:53,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-20 21:31:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:53,174 INFO L225 Difference]: With dead ends: 233 [2022-11-20 21:31:53,174 INFO L226 Difference]: Without dead ends: 233 [2022-11-20 21:31:53,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:53,175 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:53,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 2 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:31:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-20 21:31:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-11-20 21:31:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 201 states have (on average 2.781094527363184) internal successors, (559), 232 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 559 transitions. [2022-11-20 21:31:53,195 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 559 transitions. Word has length 5 [2022-11-20 21:31:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:53,196 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 559 transitions. [2022-11-20 21:31:53,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 559 transitions. [2022-11-20 21:31:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 21:31:53,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:53,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 21:31:53,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:31:53,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:53,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1218005965, now seen corresponding path program 1 times [2022-11-20 21:31:53,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:53,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198104851] [2022-11-20 21:31:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:53,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:53,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:53,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620632148] [2022-11-20 21:31:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:53,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:53,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:53,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:53,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:31:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:53,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:31:53,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:53,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:31:53,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:53,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198104851] [2022-11-20 21:31:53,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:53,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620632148] [2022-11-20 21:31:53,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620632148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:31:53,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:31:53,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:31:53,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797256042] [2022-11-20 21:31:53,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:31:53,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:31:53,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:53,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:31:53,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:53,569 INFO L87 Difference]: Start difference. First operand 233 states and 559 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:53,789 INFO L93 Difference]: Finished difference Result 452 states and 1090 transitions. [2022-11-20 21:31:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:31:53,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-20 21:31:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:53,793 INFO L225 Difference]: With dead ends: 452 [2022-11-20 21:31:53,793 INFO L226 Difference]: Without dead ends: 452 [2022-11-20 21:31:53,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:53,794 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:53,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 4 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:31:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-11-20 21:31:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 239. [2022-11-20 21:31:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 207 states have (on average 2.763285024154589) internal successors, (572), 238 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 572 transitions. [2022-11-20 21:31:53,822 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 572 transitions. Word has length 5 [2022-11-20 21:31:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:53,822 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 572 transitions. [2022-11-20 21:31:53,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 572 transitions. [2022-11-20 21:31:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:31:53,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:53,824 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 21:31:53,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:31:54,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 21:31:54,030 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:54,031 INFO L85 PathProgramCache]: Analyzing trace with hash -932936345, now seen corresponding path program 2 times [2022-11-20 21:31:54,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:54,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988227729] [2022-11-20 21:31:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:54,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:54,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:54,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693315111] [2022-11-20 21:31:54,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:31:54,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:54,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:54,047 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:54,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:31:54,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:31:54,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:31:54,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:31:54,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:31:54,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:31:54,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:54,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988227729] [2022-11-20 21:31:54,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:54,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693315111] [2022-11-20 21:31:54,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693315111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:31:54,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:31:54,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:31:54,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731453643] [2022-11-20 21:31:54,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:31:54,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:31:54,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:54,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:31:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:54,531 INFO L87 Difference]: Start difference. First operand 239 states and 572 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:54,615 INFO L93 Difference]: Finished difference Result 238 states and 571 transitions. [2022-11-20 21:31:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:31:54,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 21:31:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:54,617 INFO L225 Difference]: With dead ends: 238 [2022-11-20 21:31:54,617 INFO L226 Difference]: Without dead ends: 238 [2022-11-20 21:31:54,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:54,619 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:54,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-20 21:31:54,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-20 21:31:54,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2022-11-20 21:31:54,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 203 states have (on average 2.773399014778325) internal successors, (563), 233 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 563 transitions. [2022-11-20 21:31:54,628 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 563 transitions. Word has length 6 [2022-11-20 21:31:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:54,629 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 563 transitions. [2022-11-20 21:31:54,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 563 transitions. [2022-11-20 21:31:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:31:54,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:54,630 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-20 21:31:54,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:31:54,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 21:31:54,830 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2085263058, now seen corresponding path program 1 times [2022-11-20 21:31:54,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:54,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832631983] [2022-11-20 21:31:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:54,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:54,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:54,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982090586] [2022-11-20 21:31:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:54,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:54,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:54,848 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:54,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:31:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:54,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:31:54,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:31:55,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:31:55,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:55,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832631983] [2022-11-20 21:31:55,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:55,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982090586] [2022-11-20 21:31:55,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982090586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:31:55,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:31:55,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:31:55,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133859259] [2022-11-20 21:31:55,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:31:55,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:31:55,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:55,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:31:55,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:31:55,016 INFO L87 Difference]: Start difference. First operand 234 states and 563 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:55,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:55,312 INFO L93 Difference]: Finished difference Result 664 states and 1610 transitions. [2022-11-20 21:31:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:31:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:31:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:55,317 INFO L225 Difference]: With dead ends: 664 [2022-11-20 21:31:55,317 INFO L226 Difference]: Without dead ends: 664 [2022-11-20 21:31:55,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:31:55,318 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 97 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:55,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 6 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:31:55,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-11-20 21:31:55,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 236. [2022-11-20 21:31:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 205 states have (on average 2.7609756097560973) internal successors, (566), 235 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 566 transitions. [2022-11-20 21:31:55,347 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 566 transitions. Word has length 7 [2022-11-20 21:31:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:55,348 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 566 transitions. [2022-11-20 21:31:55,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 566 transitions. [2022-11-20 21:31:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:31:55,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:55,349 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-20 21:31:55,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:31:55,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:55,555 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:55,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2022299112, now seen corresponding path program 1 times [2022-11-20 21:31:55,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:55,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579264339] [2022-11-20 21:31:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:55,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:55,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:55,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793189474] [2022-11-20 21:31:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:55,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:55,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:55,577 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:55,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:31:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:31:55,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:55,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:31:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:55,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:55,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579264339] [2022-11-20 21:31:55,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:55,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793189474] [2022-11-20 21:31:55,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793189474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:31:55,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1051804372] [2022-11-20 21:31:55,779 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:31:55,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:31:55,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-20 21:31:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699497483] [2022-11-20 21:31:55,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:31:55,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:31:55,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:31:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:31:55,785 INFO L87 Difference]: Start difference. First operand 236 states and 566 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:56,158 INFO L93 Difference]: Finished difference Result 1106 states and 2677 transitions. [2022-11-20 21:31:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:31:56,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:31:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:56,166 INFO L225 Difference]: With dead ends: 1106 [2022-11-20 21:31:56,166 INFO L226 Difference]: Without dead ends: 1106 [2022-11-20 21:31:56,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:31:56,167 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 231 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:56,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 10 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:31:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-11-20 21:31:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 254. [2022-11-20 21:31:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 223 states have (on average 2.713004484304933) internal successors, (605), 253 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 605 transitions. [2022-11-20 21:31:56,185 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 605 transitions. Word has length 7 [2022-11-20 21:31:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:56,186 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 605 transitions. [2022-11-20 21:31:56,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 605 transitions. [2022-11-20 21:31:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:31:56,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:56,187 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-20 21:31:56,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:31:56,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:56,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:56,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:56,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2132634218, now seen corresponding path program 1 times [2022-11-20 21:31:56,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:56,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755909451] [2022-11-20 21:31:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:56,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:56,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:56,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954097308] [2022-11-20 21:31:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:56,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:56,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:56,434 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:56,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:31:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:56,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:31:56,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:31:56,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:31:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:31:56,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:56,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755909451] [2022-11-20 21:31:56,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:56,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954097308] [2022-11-20 21:31:56,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954097308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:31:56,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227590763] [2022-11-20 21:31:56,700 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:31:56,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:31:56,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-20 21:31:56,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795374085] [2022-11-20 21:31:56,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:31:56,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:31:56,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:56,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:31:56,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:31:56,703 INFO L87 Difference]: Start difference. First operand 254 states and 605 transitions. Second operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:57,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:57,352 INFO L93 Difference]: Finished difference Result 1356 states and 3276 transitions. [2022-11-20 21:31:57,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 21:31:57,353 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:31:57,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:57,361 INFO L225 Difference]: With dead ends: 1356 [2022-11-20 21:31:57,361 INFO L226 Difference]: Without dead ends: 1356 [2022-11-20 21:31:57,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:31:57,362 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 645 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:57,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 14 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:31:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-11-20 21:31:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 256. [2022-11-20 21:31:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 225 states have (on average 2.7066666666666666) internal successors, (609), 255 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 609 transitions. [2022-11-20 21:31:57,382 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 609 transitions. Word has length 8 [2022-11-20 21:31:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:57,382 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 609 transitions. [2022-11-20 21:31:57,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:57,382 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 609 transitions. [2022-11-20 21:31:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:31:57,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:57,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:31:57,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 21:31:57,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 21:31:57,589 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:57,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1593439081, now seen corresponding path program 1 times [2022-11-20 21:31:57,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:57,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139912761] [2022-11-20 21:31:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:57,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:57,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:57,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644400436] [2022-11-20 21:31:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:57,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:57,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:57,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:57,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 21:31:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:57,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:31:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:57,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:31:57,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:57,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139912761] [2022-11-20 21:31:57,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:57,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644400436] [2022-11-20 21:31:57,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644400436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:31:57,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:31:57,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:31:57,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937231425] [2022-11-20 21:31:57,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:31:57,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:31:57,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:57,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:31:57,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:31:57,795 INFO L87 Difference]: Start difference. First operand 256 states and 609 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:58,121 INFO L93 Difference]: Finished difference Result 538 states and 1208 transitions. [2022-11-20 21:31:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:31:58,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2022-11-20 21:31:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:58,125 INFO L225 Difference]: With dead ends: 538 [2022-11-20 21:31:58,125 INFO L226 Difference]: Without dead ends: 538 [2022-11-20 21:31:58,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:31:58,127 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 138 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:58,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 11 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:31:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-20 21:31:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 348. [2022-11-20 21:31:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 317 states have (on average 2.6277602523659307) internal successors, (833), 347 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 833 transitions. [2022-11-20 21:31:58,143 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 833 transitions. Word has length 8 [2022-11-20 21:31:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:58,144 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 833 transitions. [2022-11-20 21:31:58,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 833 transitions. [2022-11-20 21:31:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:31:58,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:58,146 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1] [2022-11-20 21:31:58,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 21:31:58,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 21:31:58,352 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash 693827118, now seen corresponding path program 2 times [2022-11-20 21:31:58,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:58,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549052849] [2022-11-20 21:31:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:58,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:58,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:58,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785813092] [2022-11-20 21:31:58,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:31:58,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:58,368 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:58,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 21:31:58,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:31:58,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:31:58,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:31:58,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 21:31:59,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:31:59,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:59,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549052849] [2022-11-20 21:31:59,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:59,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785813092] [2022-11-20 21:31:59,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785813092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:31:59,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:31:59,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:31:59,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666366839] [2022-11-20 21:31:59,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:31:59,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:31:59,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:59,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:31:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:31:59,333 INFO L87 Difference]: Start difference. First operand 348 states and 833 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:59,389 INFO L93 Difference]: Finished difference Result 347 states and 832 transitions. [2022-11-20 21:31:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:31:59,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:31:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:59,392 INFO L225 Difference]: With dead ends: 347 [2022-11-20 21:31:59,392 INFO L226 Difference]: Without dead ends: 347 [2022-11-20 21:31:59,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:31:59,393 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:59,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-11-20 21:31:59,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-20 21:31:59,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2022-11-20 21:31:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 314 states have (on average 2.6305732484076434) internal successors, (826), 343 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 826 transitions. [2022-11-20 21:31:59,403 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 826 transitions. Word has length 9 [2022-11-20 21:31:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:59,403 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 826 transitions. [2022-11-20 21:31:59,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 826 transitions. [2022-11-20 21:31:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:31:59,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:59,404 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-20 21:31:59,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:31:59,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:59,615 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:31:59,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:59,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2076185680, now seen corresponding path program 1 times [2022-11-20 21:31:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:59,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043767593] [2022-11-20 21:31:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:59,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:59,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:59,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247492739] [2022-11-20 21:31:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:59,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:59,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:59,664 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:59,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:31:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:59,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 21:31:59,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:59,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:31:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:31:59,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043767593] [2022-11-20 21:31:59,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247492739] [2022-11-20 21:31:59,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247492739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:31:59,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2079509943] [2022-11-20 21:31:59,924 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:31:59,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:31:59,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-20 21:31:59,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258413726] [2022-11-20 21:31:59,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:31:59,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:31:59,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:59,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:31:59,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:31:59,926 INFO L87 Difference]: Start difference. First operand 344 states and 826 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:00,762 INFO L93 Difference]: Finished difference Result 3250 states and 7880 transitions. [2022-11-20 21:32:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:32:00,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:32:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:00,781 INFO L225 Difference]: With dead ends: 3250 [2022-11-20 21:32:00,781 INFO L226 Difference]: Without dead ends: 3250 [2022-11-20 21:32:00,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:32:00,782 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 672 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:00,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 22 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:32:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2022-11-20 21:32:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 404. [2022-11-20 21:32:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 374 states have (on average 2.5614973262032086) internal successors, (958), 403 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 958 transitions. [2022-11-20 21:32:00,819 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 958 transitions. Word has length 9 [2022-11-20 21:32:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:00,820 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 958 transitions. [2022-11-20 21:32:00,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 958 transitions. [2022-11-20 21:32:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:32:00,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:00,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:00,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:01,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:01,027 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1050054918, now seen corresponding path program 1 times [2022-11-20 21:32:01,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:01,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174637122] [2022-11-20 21:32:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:01,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:01,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:01,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549572002] [2022-11-20 21:32:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:01,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:01,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:01,070 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:01,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 21:32:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:01,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:32:01,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:32:01,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:32:01,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:01,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174637122] [2022-11-20 21:32:01,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:01,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549572002] [2022-11-20 21:32:01,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549572002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:32:01,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:32:01,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:32:01,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263355024] [2022-11-20 21:32:01,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:01,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:32:01,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:01,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:32:01,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:01,226 INFO L87 Difference]: Start difference. First operand 404 states and 958 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:01,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:01,394 INFO L93 Difference]: Finished difference Result 525 states and 1277 transitions. [2022-11-20 21:32:01,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:32:01,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:32:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:01,397 INFO L225 Difference]: With dead ends: 525 [2022-11-20 21:32:01,397 INFO L226 Difference]: Without dead ends: 525 [2022-11-20 21:32:01,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:01,398 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:01,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 4 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:32:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-20 21:32:01,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 464. [2022-11-20 21:32:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 434 states have (on average 2.695852534562212) internal successors, (1170), 463 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1170 transitions. [2022-11-20 21:32:01,415 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1170 transitions. Word has length 10 [2022-11-20 21:32:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:01,415 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 1170 transitions. [2022-11-20 21:32:01,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1170 transitions. [2022-11-20 21:32:01,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:32:01,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:01,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:01,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:01,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 21:32:01,622 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:01,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1050054920, now seen corresponding path program 1 times [2022-11-20 21:32:01,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:01,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686065672] [2022-11-20 21:32:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:01,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:01,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:01,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362124471] [2022-11-20 21:32:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:01,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:01,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:01,636 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:01,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 21:32:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:32:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:32:01,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:32:01,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:01,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686065672] [2022-11-20 21:32:01,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:01,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362124471] [2022-11-20 21:32:01,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362124471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:32:01,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:32:01,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:32:01,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433324897] [2022-11-20 21:32:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:01,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:32:01,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:01,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:32:01,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:01,800 INFO L87 Difference]: Start difference. First operand 464 states and 1170 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:01,939 INFO L93 Difference]: Finished difference Result 434 states and 1064 transitions. [2022-11-20 21:32:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:32:01,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:32:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:01,942 INFO L225 Difference]: With dead ends: 434 [2022-11-20 21:32:01,942 INFO L226 Difference]: Without dead ends: 434 [2022-11-20 21:32:01,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:01,943 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:01,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 4 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:32:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-20 21:32:01,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-11-20 21:32:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 413 states have (on average 2.5762711864406778) internal successors, (1064), 433 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1064 transitions. [2022-11-20 21:32:01,955 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1064 transitions. Word has length 10 [2022-11-20 21:32:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:01,956 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 1064 transitions. [2022-11-20 21:32:01,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1064 transitions. [2022-11-20 21:32:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:32:01,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:01,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:01,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:02,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 21:32:02,163 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:02,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1674795335, now seen corresponding path program 1 times [2022-11-20 21:32:02,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:02,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624581189] [2022-11-20 21:32:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:02,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:02,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:02,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579207280] [2022-11-20 21:32:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:02,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:02,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:02,175 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:02,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 21:32:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:02,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:32:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:32:02,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:32:02,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:02,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624581189] [2022-11-20 21:32:02,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:02,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579207280] [2022-11-20 21:32:02,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579207280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:32:02,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:32:02,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:32:02,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404600299] [2022-11-20 21:32:02,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:02,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:32:02,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:02,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:32:02,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:32:02,355 INFO L87 Difference]: Start difference. First operand 434 states and 1064 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:02,549 INFO L93 Difference]: Finished difference Result 516 states and 1238 transitions. [2022-11-20 21:32:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:32:02,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:32:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:02,552 INFO L225 Difference]: With dead ends: 516 [2022-11-20 21:32:02,552 INFO L226 Difference]: Without dead ends: 484 [2022-11-20 21:32:02,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:32:02,553 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:02,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 8 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:32:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-20 21:32:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 481. [2022-11-20 21:32:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 460 states have (on average 2.532608695652174) internal successors, (1165), 480 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1165 transitions. [2022-11-20 21:32:02,566 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1165 transitions. Word has length 10 [2022-11-20 21:32:02,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:02,567 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 1165 transitions. [2022-11-20 21:32:02,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1165 transitions. [2022-11-20 21:32:02,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:32:02,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:02,568 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:02,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:02,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 21:32:02,772 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:02,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:02,773 INFO L85 PathProgramCache]: Analyzing trace with hash -214506905, now seen corresponding path program 1 times [2022-11-20 21:32:02,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:02,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890893204] [2022-11-20 21:32:02,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:02,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:02,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:02,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887022023] [2022-11-20 21:32:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:02,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:02,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:02,788 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:02,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 21:32:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:32:02,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:32:03,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:32:03,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:03,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890893204] [2022-11-20 21:32:03,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:03,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887022023] [2022-11-20 21:32:03,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887022023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:03,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079309847] [2022-11-20 21:32:03,104 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:03,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:03,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-20 21:32:03,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810309918] [2022-11-20 21:32:03,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:03,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:32:03,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:32:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:32:03,108 INFO L87 Difference]: Start difference. First operand 481 states and 1165 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:03,689 INFO L93 Difference]: Finished difference Result 820 states and 1913 transitions. [2022-11-20 21:32:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 21:32:03,690 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:32:03,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:03,693 INFO L225 Difference]: With dead ends: 820 [2022-11-20 21:32:03,693 INFO L226 Difference]: Without dead ends: 787 [2022-11-20 21:32:03,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:32:03,694 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 220 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:03,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 26 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:32:03,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-11-20 21:32:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 633. [2022-11-20 21:32:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 612 states have (on average 2.5506535947712417) internal successors, (1561), 632 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1561 transitions. [2022-11-20 21:32:03,712 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1561 transitions. Word has length 12 [2022-11-20 21:32:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:03,712 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 1561 transitions. [2022-11-20 21:32:03,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:03,713 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1561 transitions. [2022-11-20 21:32:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:32:03,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:03,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:03,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:03,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 21:32:03,919 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1700397234, now seen corresponding path program 1 times [2022-11-20 21:32:03,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:03,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599644340] [2022-11-20 21:32:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:03,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:03,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753866803] [2022-11-20 21:32:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:03,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:03,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:03,931 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:03,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 21:32:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:04,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:32:04,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:32:04,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:32:04,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:04,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599644340] [2022-11-20 21:32:04,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:04,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753866803] [2022-11-20 21:32:04,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753866803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:32:04,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:32:04,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:32:04,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159250376] [2022-11-20 21:32:04,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:04,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:32:04,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:04,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:32:04,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:04,103 INFO L87 Difference]: Start difference. First operand 633 states and 1561 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:04,228 INFO L93 Difference]: Finished difference Result 607 states and 1493 transitions. [2022-11-20 21:32:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:32:04,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:32:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:04,231 INFO L225 Difference]: With dead ends: 607 [2022-11-20 21:32:04,231 INFO L226 Difference]: Without dead ends: 607 [2022-11-20 21:32:04,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:04,232 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:04,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 4 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:32:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-11-20 21:32:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2022-11-20 21:32:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 588 states have (on average 2.5391156462585034) internal successors, (1493), 606 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1493 transitions. [2022-11-20 21:32:04,248 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1493 transitions. Word has length 12 [2022-11-20 21:32:04,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:04,249 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 1493 transitions. [2022-11-20 21:32:04,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1493 transitions. [2022-11-20 21:32:04,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:32:04,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:04,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:04,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:04,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 21:32:04,469 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:04,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:04,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1700397202, now seen corresponding path program 1 times [2022-11-20 21:32:04,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:04,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208963524] [2022-11-20 21:32:04,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:04,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:04,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:04,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784167294] [2022-11-20 21:32:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:04,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:04,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:04,495 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:04,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 21:32:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:32:04,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:32:04,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:32:04,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:04,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208963524] [2022-11-20 21:32:04,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:04,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784167294] [2022-11-20 21:32:04,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784167294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:32:04,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:32:04,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:32:04,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148873187] [2022-11-20 21:32:04,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:04,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:32:04,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:04,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:32:04,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:32:04,718 INFO L87 Difference]: Start difference. First operand 607 states and 1493 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:05,008 INFO L93 Difference]: Finished difference Result 1185 states and 2910 transitions. [2022-11-20 21:32:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:32:05,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:32:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:05,014 INFO L225 Difference]: With dead ends: 1185 [2022-11-20 21:32:05,014 INFO L226 Difference]: Without dead ends: 1125 [2022-11-20 21:32:05,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:32:05,015 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:05,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 12 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:32:05,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-11-20 21:32:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 856. [2022-11-20 21:32:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 837 states have (on average 2.5364396654719235) internal successors, (2123), 855 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2123 transitions. [2022-11-20 21:32:05,041 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2123 transitions. Word has length 12 [2022-11-20 21:32:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:05,041 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 2123 transitions. [2022-11-20 21:32:05,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2123 transitions. [2022-11-20 21:32:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:32:05,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:05,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:05,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:05,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:05,254 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:05,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:05,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1700397235, now seen corresponding path program 1 times [2022-11-20 21:32:05,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:05,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865523977] [2022-11-20 21:32:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:05,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:05,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:05,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050408829] [2022-11-20 21:32:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:05,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:05,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:05,268 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:05,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 21:32:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:05,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:32:05,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:32:05,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:32:05,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865523977] [2022-11-20 21:32:05,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050408829] [2022-11-20 21:32:05,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050408829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:32:05,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:32:05,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:32:05,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962304512] [2022-11-20 21:32:05,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:05,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:32:05,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:32:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:05,483 INFO L87 Difference]: Start difference. First operand 856 states and 2123 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:05,645 INFO L93 Difference]: Finished difference Result 1207 states and 3065 transitions. [2022-11-20 21:32:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:32:05,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:32:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:05,660 INFO L225 Difference]: With dead ends: 1207 [2022-11-20 21:32:05,665 INFO L226 Difference]: Without dead ends: 1207 [2022-11-20 21:32:05,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:05,666 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:05,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 4 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:32:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-11-20 21:32:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1012. [2022-11-20 21:32:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 993 states have (on average 2.770392749244713) internal successors, (2751), 1011 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 2751 transitions. [2022-11-20 21:32:05,704 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 2751 transitions. Word has length 12 [2022-11-20 21:32:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:05,705 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 2751 transitions. [2022-11-20 21:32:05,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 2751 transitions. [2022-11-20 21:32:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:32:05,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:05,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:05,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:05,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:05,913 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash -611695378, now seen corresponding path program 1 times [2022-11-20 21:32:05,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:05,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978610314] [2022-11-20 21:32:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:05,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:05,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:05,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072081644] [2022-11-20 21:32:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:05,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:05,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:05,932 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:05,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 21:32:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:06,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:32:06,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:32:06,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:32:06,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:06,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978610314] [2022-11-20 21:32:06,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:06,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072081644] [2022-11-20 21:32:06,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072081644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:32:06,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:32:06,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:32:06,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689546738] [2022-11-20 21:32:06,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:06,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:32:06,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:32:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:06,163 INFO L87 Difference]: Start difference. First operand 1012 states and 2751 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:06,294 INFO L93 Difference]: Finished difference Result 1311 states and 3727 transitions. [2022-11-20 21:32:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:32:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 21:32:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:06,301 INFO L225 Difference]: With dead ends: 1311 [2022-11-20 21:32:06,301 INFO L226 Difference]: Without dead ends: 1311 [2022-11-20 21:32:06,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:06,302 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:06,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 5 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:32:06,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-11-20 21:32:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1168. [2022-11-20 21:32:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1149 states have (on average 2.998259355961706) internal successors, (3445), 1167 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3445 transitions. [2022-11-20 21:32:06,340 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3445 transitions. Word has length 13 [2022-11-20 21:32:06,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:06,340 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 3445 transitions. [2022-11-20 21:32:06,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3445 transitions. [2022-11-20 21:32:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:32:06,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:06,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:06,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:06,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 21:32:06,548 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:06,549 INFO L85 PathProgramCache]: Analyzing trace with hash -611695325, now seen corresponding path program 1 times [2022-11-20 21:32:06,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:06,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684963174] [2022-11-20 21:32:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:06,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:06,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:06,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151755657] [2022-11-20 21:32:06,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:06,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:06,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:06,563 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:06,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 21:32:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:06,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:32:06,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:32:06,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:32:06,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:06,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684963174] [2022-11-20 21:32:06,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:06,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151755657] [2022-11-20 21:32:06,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151755657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:32:06,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:32:06,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:32:06,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79043263] [2022-11-20 21:32:06,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:06,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:32:06,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:06,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:32:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:06,771 INFO L87 Difference]: Start difference. First operand 1168 states and 3445 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:06,870 INFO L93 Difference]: Finished difference Result 1155 states and 3215 transitions. [2022-11-20 21:32:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:32:06,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 21:32:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:06,876 INFO L225 Difference]: With dead ends: 1155 [2022-11-20 21:32:06,876 INFO L226 Difference]: Without dead ends: 1155 [2022-11-20 21:32:06,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:06,877 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:06,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 5 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:32:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-11-20 21:32:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1116. [2022-11-20 21:32:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1101 states have (on average 2.863760217983651) internal successors, (3153), 1115 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3153 transitions. [2022-11-20 21:32:06,909 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3153 transitions. Word has length 13 [2022-11-20 21:32:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:06,909 INFO L495 AbstractCegarLoop]: Abstraction has 1116 states and 3153 transitions. [2022-11-20 21:32:06,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:06,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3153 transitions. [2022-11-20 21:32:06,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:32:06,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:06,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:06,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-20 21:32:07,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:07,117 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash -611695416, now seen corresponding path program 1 times [2022-11-20 21:32:07,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:07,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457106690] [2022-11-20 21:32:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:07,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:07,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:07,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660436513] [2022-11-20 21:32:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:07,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:07,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:07,133 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:07,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 21:32:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:32:07,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:32:07,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:32:07,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:07,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457106690] [2022-11-20 21:32:07,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:07,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660436513] [2022-11-20 21:32:07,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660436513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:32:07,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:32:07,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:32:07,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245597824] [2022-11-20 21:32:07,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:07,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:32:07,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:07,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:32:07,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:07,598 INFO L87 Difference]: Start difference. First operand 1116 states and 3153 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:07,707 INFO L93 Difference]: Finished difference Result 1207 states and 3195 transitions. [2022-11-20 21:32:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:32:07,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 21:32:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:07,712 INFO L225 Difference]: With dead ends: 1207 [2022-11-20 21:32:07,712 INFO L226 Difference]: Without dead ends: 1207 [2022-11-20 21:32:07,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:32:07,713 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:07,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 4 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:32:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-11-20 21:32:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1116. [2022-11-20 21:32:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1101 states have (on average 2.7693006357856493) internal successors, (3049), 1115 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3049 transitions. [2022-11-20 21:32:07,747 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3049 transitions. Word has length 13 [2022-11-20 21:32:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:07,747 INFO L495 AbstractCegarLoop]: Abstraction has 1116 states and 3049 transitions. [2022-11-20 21:32:07,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3049 transitions. [2022-11-20 21:32:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:32:07,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:07,749 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2022-11-20 21:32:07,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:07,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 21:32:07,956 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:07,956 INFO L85 PathProgramCache]: Analyzing trace with hash 10820729, now seen corresponding path program 2 times [2022-11-20 21:32:07,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:07,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959600538] [2022-11-20 21:32:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:07,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:07,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:07,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481031118] [2022-11-20 21:32:07,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:32:07,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:07,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:07,974 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:07,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 21:32:08,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:32:08,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:32:08,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:32:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 21:32:08,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 21:32:08,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:08,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959600538] [2022-11-20 21:32:08,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:08,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481031118] [2022-11-20 21:32:08,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481031118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:08,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1890044878] [2022-11-20 21:32:08,229 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:08,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:08,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2022-11-20 21:32:08,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477685619] [2022-11-20 21:32:08,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:08,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:32:08,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:08,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:32:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:32:08,231 INFO L87 Difference]: Start difference. First operand 1116 states and 3049 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:08,387 INFO L93 Difference]: Finished difference Result 1127 states and 3001 transitions. [2022-11-20 21:32:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:32:08,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 21:32:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:08,392 INFO L225 Difference]: With dead ends: 1127 [2022-11-20 21:32:08,392 INFO L226 Difference]: Without dead ends: 1127 [2022-11-20 21:32:08,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:32:08,393 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:08,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:32:08,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-20 21:32:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 866. [2022-11-20 21:32:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 852 states have (on average 2.892018779342723) internal successors, (2464), 865 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2464 transitions. [2022-11-20 21:32:08,421 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2464 transitions. Word has length 13 [2022-11-20 21:32:08,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:08,421 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 2464 transitions. [2022-11-20 21:32:08,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:08,421 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2464 transitions. [2022-11-20 21:32:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:32:08,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:08,422 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:08,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:08,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 21:32:08,628 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:08,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1938552406, now seen corresponding path program 2 times [2022-11-20 21:32:08,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:08,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314088580] [2022-11-20 21:32:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:08,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:08,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:08,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083322007] [2022-11-20 21:32:08,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:32:08,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:08,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:08,644 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:08,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 21:32:08,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:32:08,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:32:08,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:32:08,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:32:09,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:32:09,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:09,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314088580] [2022-11-20 21:32:09,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:09,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083322007] [2022-11-20 21:32:09,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083322007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:09,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [755212396] [2022-11-20 21:32:09,660 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:09,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:09,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 21:32:09,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717372740] [2022-11-20 21:32:09,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:09,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:32:09,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:09,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:32:09,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:32:09,662 INFO L87 Difference]: Start difference. First operand 866 states and 2464 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 21:32:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:10,263 INFO L93 Difference]: Finished difference Result 1060 states and 2915 transitions. [2022-11-20 21:32:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:32:10,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 14 [2022-11-20 21:32:10,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:10,267 INFO L225 Difference]: With dead ends: 1060 [2022-11-20 21:32:10,267 INFO L226 Difference]: Without dead ends: 1056 [2022-11-20 21:32:10,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:32:10,269 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 97 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:10,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 27 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 160 Invalid, 0 Unknown, 144 Unchecked, 0.5s Time] [2022-11-20 21:32:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-11-20 21:32:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 882. [2022-11-20 21:32:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 868 states have (on average 2.877880184331797) internal successors, (2498), 881 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:10,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2498 transitions. [2022-11-20 21:32:10,298 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2498 transitions. Word has length 14 [2022-11-20 21:32:10,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:10,299 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 2498 transitions. [2022-11-20 21:32:10,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 21:32:10,299 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2498 transitions. [2022-11-20 21:32:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:32:10,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:10,302 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:10,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:10,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 21:32:10,505 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1994102339, now seen corresponding path program 1 times [2022-11-20 21:32:10,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:10,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271951522] [2022-11-20 21:32:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:10,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:10,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:10,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513897020] [2022-11-20 21:32:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:10,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:10,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:10,525 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:10,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 21:32:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:10,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:32:10,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:32:10,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:32:10,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:10,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271951522] [2022-11-20 21:32:10,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:10,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513897020] [2022-11-20 21:32:10,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513897020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:10,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1409705212] [2022-11-20 21:32:10,863 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:10,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:10,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 21:32:10,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474361649] [2022-11-20 21:32:10,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:10,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:32:10,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:10,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:32:10,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:32:10,867 INFO L87 Difference]: Start difference. First operand 882 states and 2498 transitions. Second operand has 9 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) [2022-11-20 21:32:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:11,411 INFO L93 Difference]: Finished difference Result 1519 states and 4061 transitions. [2022-11-20 21:32:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:32:11,412 INFO L78 Accepts]: Start accepts. Automaton has has 9 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 14 [2022-11-20 21:32:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:11,416 INFO L225 Difference]: With dead ends: 1519 [2022-11-20 21:32:11,416 INFO L226 Difference]: Without dead ends: 1405 [2022-11-20 21:32:11,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:32:11,417 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 132 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:11,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 27 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:32:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-11-20 21:32:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1205. [2022-11-20 21:32:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1191 states have (on average 2.847187237615449) internal successors, (3391), 1204 states have internal predecessors, (3391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 3391 transitions. [2022-11-20 21:32:11,449 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 3391 transitions. Word has length 14 [2022-11-20 21:32:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:11,449 INFO L495 AbstractCegarLoop]: Abstraction has 1205 states and 3391 transitions. [2022-11-20 21:32:11,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 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) [2022-11-20 21:32:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 3391 transitions. [2022-11-20 21:32:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 21:32:11,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:11,451 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:11,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:11,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:11,656 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:11,657 INFO L85 PathProgramCache]: Analyzing trace with hash 34607828, now seen corresponding path program 1 times [2022-11-20 21:32:11,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:11,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462876126] [2022-11-20 21:32:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:11,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:11,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:11,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029328858] [2022-11-20 21:32:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:11,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:11,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:11,674 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:11,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 21:32:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:11,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:32:11,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:32:11,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:32:11,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:11,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462876126] [2022-11-20 21:32:11,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:11,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029328858] [2022-11-20 21:32:11,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029328858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:11,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855808610] [2022-11-20 21:32:11,949 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:11,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:11,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-20 21:32:11,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256493289] [2022-11-20 21:32:11,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:11,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:32:11,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:32:11,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:32:11,951 INFO L87 Difference]: Start difference. First operand 1205 states and 3391 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:12,260 INFO L93 Difference]: Finished difference Result 2442 states and 6645 transitions. [2022-11-20 21:32:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:32:12,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 21:32:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:12,268 INFO L225 Difference]: With dead ends: 2442 [2022-11-20 21:32:12,269 INFO L226 Difference]: Without dead ends: 2442 [2022-11-20 21:32:12,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:32:12,269 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 124 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:12,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 8 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:32:12,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2022-11-20 21:32:12,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 1781. [2022-11-20 21:32:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1767 states have (on average 2.9581211092246744) internal successors, (5227), 1780 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 5227 transitions. [2022-11-20 21:32:12,319 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 5227 transitions. Word has length 15 [2022-11-20 21:32:12,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:12,319 INFO L495 AbstractCegarLoop]: Abstraction has 1781 states and 5227 transitions. [2022-11-20 21:32:12,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 5227 transitions. [2022-11-20 21:32:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 21:32:12,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:12,320 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-20 21:32:12,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:12,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 21:32:12,526 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:12,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:12,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1071391824, now seen corresponding path program 2 times [2022-11-20 21:32:12,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:12,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408049733] [2022-11-20 21:32:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:12,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:12,543 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:12,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204681579] [2022-11-20 21:32:12,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:32:12,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:12,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:12,545 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:12,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 21:32:12,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:32:12,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:32:12,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:32:12,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 21:32:12,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:32:12,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408049733] [2022-11-20 21:32:12,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204681579] [2022-11-20 21:32:12,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204681579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:32:12,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:32:12,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:32:12,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892881009] [2022-11-20 21:32:12,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:12,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:32:12,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:32:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:32:12,800 INFO L87 Difference]: Start difference. First operand 1781 states and 5227 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:12,975 INFO L93 Difference]: Finished difference Result 1828 states and 5314 transitions. [2022-11-20 21:32:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:32:12,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 21:32:12,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:12,981 INFO L225 Difference]: With dead ends: 1828 [2022-11-20 21:32:12,982 INFO L226 Difference]: Without dead ends: 1828 [2022-11-20 21:32:12,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:32:12,983 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 68 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:12,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 4 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:32:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2022-11-20 21:32:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1696. [2022-11-20 21:32:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1683 states have (on average 3.0005941770647655) internal successors, (5050), 1695 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 5050 transitions. [2022-11-20 21:32:13,029 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 5050 transitions. Word has length 15 [2022-11-20 21:32:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:13,029 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 5050 transitions. [2022-11-20 21:32:13,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 5050 transitions. [2022-11-20 21:32:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 21:32:13,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:13,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:13,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:13,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 21:32:13,236 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:13,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash 530193267, now seen corresponding path program 1 times [2022-11-20 21:32:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:13,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228371882] [2022-11-20 21:32:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:13,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:13,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:13,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281678404] [2022-11-20 21:32:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:13,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:13,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:13,251 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:13,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 21:32:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:13,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:32:13,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:32:13,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:32:13,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228371882] [2022-11-20 21:32:13,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:13,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281678404] [2022-11-20 21:32:13,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281678404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:13,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542202876] [2022-11-20 21:32:13,640 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:13,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:13,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-20 21:32:13,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892105337] [2022-11-20 21:32:13,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:13,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:32:13,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:32:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:32:13,642 INFO L87 Difference]: Start difference. First operand 1696 states and 5050 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 11 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) [2022-11-20 21:32:14,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:14,412 INFO L93 Difference]: Finished difference Result 4340 states and 12184 transitions. [2022-11-20 21:32:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:32:14,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 11 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 16 [2022-11-20 21:32:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:14,426 INFO L225 Difference]: With dead ends: 4340 [2022-11-20 21:32:14,426 INFO L226 Difference]: Without dead ends: 4152 [2022-11-20 21:32:14,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2022-11-20 21:32:14,427 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 261 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:14,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 30 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 21:32:14,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4152 states. [2022-11-20 21:32:14,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4152 to 2316. [2022-11-20 21:32:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2303 states have (on average 3.033434650455927) internal successors, (6986), 2315 states have internal predecessors, (6986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 6986 transitions. [2022-11-20 21:32:14,509 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 6986 transitions. Word has length 16 [2022-11-20 21:32:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:14,509 INFO L495 AbstractCegarLoop]: Abstraction has 2316 states and 6986 transitions. [2022-11-20 21:32:14,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 11 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) [2022-11-20 21:32:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 6986 transitions. [2022-11-20 21:32:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 21:32:14,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:14,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:14,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:14,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 21:32:14,717 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2090504238, now seen corresponding path program 2 times [2022-11-20 21:32:14,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:14,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624404860] [2022-11-20 21:32:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:14,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:14,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:14,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187649836] [2022-11-20 21:32:14,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:32:14,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:14,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:14,737 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:14,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 21:32:14,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:32:14,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:32:14,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:32:14,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 21:32:14,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 21:32:15,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624404860] [2022-11-20 21:32:15,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187649836] [2022-11-20 21:32:15,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187649836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1690999966] [2022-11-20 21:32:15,009 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:15,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:15,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2022-11-20 21:32:15,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460706282] [2022-11-20 21:32:15,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:15,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:32:15,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:32:15,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:32:15,011 INFO L87 Difference]: Start difference. First operand 2316 states and 6986 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:15,161 INFO L93 Difference]: Finished difference Result 2365 states and 6894 transitions. [2022-11-20 21:32:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:32:15,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 21:32:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:15,170 INFO L225 Difference]: With dead ends: 2365 [2022-11-20 21:32:15,170 INFO L226 Difference]: Without dead ends: 2275 [2022-11-20 21:32:15,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:32:15,171 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:15,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 4 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:32:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2022-11-20 21:32:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 2026. [2022-11-20 21:32:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2015 states have (on average 2.9786600496277917) internal successors, (6002), 2025 states have internal predecessors, (6002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 6002 transitions. [2022-11-20 21:32:15,247 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 6002 transitions. Word has length 16 [2022-11-20 21:32:15,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:15,247 INFO L495 AbstractCegarLoop]: Abstraction has 2026 states and 6002 transitions. [2022-11-20 21:32:15,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:15,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 6002 transitions. [2022-11-20 21:32:15,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 21:32:15,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:15,250 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:15,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:15,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:15,457 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash 568303859, now seen corresponding path program 2 times [2022-11-20 21:32:15,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:15,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514952203] [2022-11-20 21:32:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:15,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:15,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:15,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175829978] [2022-11-20 21:32:15,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:32:15,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:15,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:15,481 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:15,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 21:32:15,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:32:15,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:32:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:32:15,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 21:32:15,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:32:15,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:15,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514952203] [2022-11-20 21:32:15,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:15,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175829978] [2022-11-20 21:32:15,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175829978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:32:15,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:32:15,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:32:15,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639678534] [2022-11-20 21:32:15,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:15,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:32:15,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:15,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:32:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:32:15,907 INFO L87 Difference]: Start difference. First operand 2026 states and 6002 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:16,072 INFO L93 Difference]: Finished difference Result 2313 states and 6612 transitions. [2022-11-20 21:32:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:32:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 17 [2022-11-20 21:32:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:16,080 INFO L225 Difference]: With dead ends: 2313 [2022-11-20 21:32:16,080 INFO L226 Difference]: Without dead ends: 2313 [2022-11-20 21:32:16,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:32:16,081 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:16,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 4 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:32:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-11-20 21:32:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2026. [2022-11-20 21:32:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2015 states have (on average 2.940942928039702) internal successors, (5926), 2025 states have internal predecessors, (5926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 5926 transitions. [2022-11-20 21:32:16,139 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 5926 transitions. Word has length 17 [2022-11-20 21:32:16,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:16,141 INFO L495 AbstractCegarLoop]: Abstraction has 2026 states and 5926 transitions. [2022-11-20 21:32:16,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 5926 transitions. [2022-11-20 21:32:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 21:32:16,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:16,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:16,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:16,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-20 21:32:16,350 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:16,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:16,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1235732925, now seen corresponding path program 1 times [2022-11-20 21:32:16,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:16,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834991256] [2022-11-20 21:32:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:16,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:16,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:16,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665814898] [2022-11-20 21:32:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:16,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:16,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:16,369 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:16,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 21:32:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:16,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:32:16,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:32:16,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:32:16,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:16,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834991256] [2022-11-20 21:32:16,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:16,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665814898] [2022-11-20 21:32:16,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665814898] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:32:16,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:32:16,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 21:32:16,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991880018] [2022-11-20 21:32:16,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:16,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:32:16,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:16,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:32:16,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:32:16,722 INFO L87 Difference]: Start difference. First operand 2026 states and 5926 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:16,949 INFO L93 Difference]: Finished difference Result 2052 states and 5740 transitions. [2022-11-20 21:32:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:32:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2022-11-20 21:32:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:16,955 INFO L225 Difference]: With dead ends: 2052 [2022-11-20 21:32:16,955 INFO L226 Difference]: Without dead ends: 2052 [2022-11-20 21:32:16,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:32:16,956 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:16,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 5 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:32:16,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2022-11-20 21:32:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1952. [2022-11-20 21:32:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1940 states have (on average 2.838659793814433) internal successors, (5507), 1951 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 5507 transitions. [2022-11-20 21:32:17,003 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 5507 transitions. Word has length 18 [2022-11-20 21:32:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:17,004 INFO L495 AbstractCegarLoop]: Abstraction has 1952 states and 5507 transitions. [2022-11-20 21:32:17,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 5507 transitions. [2022-11-20 21:32:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 21:32:17,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:17,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:17,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:17,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 21:32:17,211 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:17,211 INFO L85 PathProgramCache]: Analyzing trace with hash 679192832, now seen corresponding path program 1 times [2022-11-20 21:32:17,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:17,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448926572] [2022-11-20 21:32:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:17,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:17,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:17,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159648206] [2022-11-20 21:32:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:17,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:17,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:17,229 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:17,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 21:32:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:17,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:32:17,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:32:17,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:32:17,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:17,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448926572] [2022-11-20 21:32:17,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:17,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159648206] [2022-11-20 21:32:17,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159648206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:17,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1313658925] [2022-11-20 21:32:17,533 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:17,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:17,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-20 21:32:17,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395449320] [2022-11-20 21:32:17,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:17,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:32:17,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:17,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:32:17,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:32:17,535 INFO L87 Difference]: Start difference. First operand 1952 states and 5507 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:17,863 INFO L93 Difference]: Finished difference Result 3771 states and 10601 transitions. [2022-11-20 21:32:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:32:17,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 21:32:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:17,874 INFO L225 Difference]: With dead ends: 3771 [2022-11-20 21:32:17,874 INFO L226 Difference]: Without dead ends: 3771 [2022-11-20 21:32:17,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:32:17,875 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 84 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:17,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 10 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:32:17,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3771 states. [2022-11-20 21:32:17,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3771 to 2978. [2022-11-20 21:32:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2966 states have (on average 3.0198921105866487) internal successors, (8957), 2977 states have internal predecessors, (8957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8957 transitions. [2022-11-20 21:32:18,006 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8957 transitions. Word has length 19 [2022-11-20 21:32:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:18,007 INFO L495 AbstractCegarLoop]: Abstraction has 2978 states and 8957 transitions. [2022-11-20 21:32:18,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8957 transitions. [2022-11-20 21:32:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 21:32:18,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:18,010 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:18,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:18,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:18,216 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:18,216 INFO L85 PathProgramCache]: Analyzing trace with hash 373498577, now seen corresponding path program 2 times [2022-11-20 21:32:18,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:18,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711803279] [2022-11-20 21:32:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:18,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:18,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:18,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72661371] [2022-11-20 21:32:18,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:32:18,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:18,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:18,233 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:18,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 21:32:18,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:32:18,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:32:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:32:18,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 21:32:19,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 21:32:19,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:19,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711803279] [2022-11-20 21:32:19,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:19,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72661371] [2022-11-20 21:32:19,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72661371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:19,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1994419371] [2022-11-20 21:32:19,396 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:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:19,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:19,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 21:32:19,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702192807] [2022-11-20 21:32:19,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:19,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:32:19,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:32:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:32:19,398 INFO L87 Difference]: Start difference. First operand 2978 states and 8957 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:20,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:20,002 INFO L93 Difference]: Finished difference Result 3942 states and 11774 transitions. [2022-11-20 21:32:20,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:32:20,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 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 21 [2022-11-20 21:32:20,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:20,012 INFO L225 Difference]: With dead ends: 3942 [2022-11-20 21:32:20,013 INFO L226 Difference]: Without dead ends: 3942 [2022-11-20 21:32:20,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:32:20,014 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 54 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:20,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 18 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2022-11-20 21:32:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2022-11-20 21:32:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 2977. [2022-11-20 21:32:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2965 states have (on average 3.0202360876897134) internal successors, (8955), 2976 states have internal predecessors, (8955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 8955 transitions. [2022-11-20 21:32:20,088 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 8955 transitions. Word has length 21 [2022-11-20 21:32:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:20,089 INFO L495 AbstractCegarLoop]: Abstraction has 2977 states and 8955 transitions. [2022-11-20 21:32:20,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 8955 transitions. [2022-11-20 21:32:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 21:32:20,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:20,091 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:20,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-20 21:32:20,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-20 21:32:20,297 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:20,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:20,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1711386222, now seen corresponding path program 1 times [2022-11-20 21:32:20,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:20,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366727811] [2022-11-20 21:32:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:20,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:20,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:20,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913136356] [2022-11-20 21:32:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:20,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:20,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:20,320 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:20,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 21:32:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:20,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:32:20,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 21:32:21,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 21:32:21,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:21,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366727811] [2022-11-20 21:32:21,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:21,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913136356] [2022-11-20 21:32:21,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913136356] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:32:21,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:32:21,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-11-20 21:32:21,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644066100] [2022-11-20 21:32:21,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:21,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:32:21,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:21,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:32:21,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:32:21,180 INFO L87 Difference]: Start difference. First operand 2977 states and 8955 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:21,604 INFO L93 Difference]: Finished difference Result 3158 states and 9315 transitions. [2022-11-20 21:32:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:32:21,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 21:32:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:21,609 INFO L225 Difference]: With dead ends: 3158 [2022-11-20 21:32:21,609 INFO L226 Difference]: Without dead ends: 3157 [2022-11-20 21:32:21,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-11-20 21:32:21,610 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 154 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:21,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 6 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:32:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2022-11-20 21:32:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 2982. [2022-11-20 21:32:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2970 states have (on average 3.0171717171717174) internal successors, (8961), 2981 states have internal predecessors, (8961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 8961 transitions. [2022-11-20 21:32:21,672 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 8961 transitions. Word has length 21 [2022-11-20 21:32:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:21,672 INFO L495 AbstractCegarLoop]: Abstraction has 2982 states and 8961 transitions. [2022-11-20 21:32:21,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 8961 transitions. [2022-11-20 21:32:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 21:32:21,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:21,677 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:21,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:21,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 21:32:21,885 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:21,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1795715810, now seen corresponding path program 1 times [2022-11-20 21:32:21,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:21,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366581889] [2022-11-20 21:32:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:21,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:21,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:21,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541759160] [2022-11-20 21:32:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:21,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:21,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:21,907 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:21,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 21:32:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:22,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:32:22,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 21:32:22,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 21:32:22,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:22,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366581889] [2022-11-20 21:32:22,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:22,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541759160] [2022-11-20 21:32:22,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541759160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:22,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1819788416] [2022-11-20 21:32:22,409 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:22,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:22,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-20 21:32:22,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954387081] [2022-11-20 21:32:22,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:22,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 21:32:22,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 21:32:22,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-20 21:32:22,410 INFO L87 Difference]: Start difference. First operand 2982 states and 8961 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:23,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:23,448 INFO L93 Difference]: Finished difference Result 5006 states and 14235 transitions. [2022-11-20 21:32:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 21:32:23,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 21:32:23,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:23,457 INFO L225 Difference]: With dead ends: 5006 [2022-11-20 21:32:23,457 INFO L226 Difference]: Without dead ends: 4712 [2022-11-20 21:32:23,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:32:23,458 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 258 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:23,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 40 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 21:32:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4712 states. [2022-11-20 21:32:23,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4712 to 3399. [2022-11-20 21:32:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3387 states have (on average 3.026867434307647) internal successors, (10252), 3398 states have internal predecessors, (10252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 10252 transitions. [2022-11-20 21:32:23,547 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 10252 transitions. Word has length 22 [2022-11-20 21:32:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:23,548 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 10252 transitions. [2022-11-20 21:32:23,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 10252 transitions. [2022-11-20 21:32:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 21:32:23,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:23,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:23,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:23,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 21:32:23,757 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:23,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1143887878, now seen corresponding path program 1 times [2022-11-20 21:32:23,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:23,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859391001] [2022-11-20 21:32:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:23,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:23,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:23,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280552412] [2022-11-20 21:32:23,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:23,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:23,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:23,776 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:23,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 21:32:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:24,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:32:24,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 21:32:24,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 21:32:24,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:24,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859391001] [2022-11-20 21:32:24,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:24,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280552412] [2022-11-20 21:32:24,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280552412] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:32:24,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:32:24,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-20 21:32:24,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145379463] [2022-11-20 21:32:24,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:32:24,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:32:24,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:24,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:32:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:32:24,155 INFO L87 Difference]: Start difference. First operand 3399 states and 10252 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2022-11-20 21:32:24,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:24,298 INFO L93 Difference]: Finished difference Result 3402 states and 10167 transitions. [2022-11-20 21:32:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:32:24,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 22 [2022-11-20 21:32:24,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:24,306 INFO L225 Difference]: With dead ends: 3402 [2022-11-20 21:32:24,306 INFO L226 Difference]: Without dead ends: 3402 [2022-11-20 21:32:24,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:32:24,306 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:24,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 10 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:32:24,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2022-11-20 21:32:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3290. [2022-11-20 21:32:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3278 states have (on average 3.033862111043319) internal successors, (9945), 3289 states have internal predecessors, (9945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:24,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 9945 transitions. [2022-11-20 21:32:24,384 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 9945 transitions. Word has length 22 [2022-11-20 21:32:24,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:24,385 INFO L495 AbstractCegarLoop]: Abstraction has 3290 states and 9945 transitions. [2022-11-20 21:32:24,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2022-11-20 21:32:24,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 9945 transitions. [2022-11-20 21:32:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 21:32:24,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:24,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:24,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:24,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:24,595 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2121434347, now seen corresponding path program 1 times [2022-11-20 21:32:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:24,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490490114] [2022-11-20 21:32:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:24,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:24,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:24,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939350687] [2022-11-20 21:32:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:24,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:24,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:24,614 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:24,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 21:32:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:25,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:32:25,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:32:25,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:32:26,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:26,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490490114] [2022-11-20 21:32:26,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:26,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939350687] [2022-11-20 21:32:26,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939350687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:26,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648447501] [2022-11-20 21:32:26,981 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:26,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:26,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-20 21:32:26,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448378899] [2022-11-20 21:32:26,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:26,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 21:32:26,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:26,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 21:32:26,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:32:26,990 INFO L87 Difference]: Start difference. First operand 3290 states and 9945 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:28,499 INFO L93 Difference]: Finished difference Result 4087 states and 11733 transitions. [2022-11-20 21:32:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:32:28,499 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 21:32:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:28,507 INFO L225 Difference]: With dead ends: 4087 [2022-11-20 21:32:28,507 INFO L226 Difference]: Without dead ends: 4087 [2022-11-20 21:32:28,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:32:28,508 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 204 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:28,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 30 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 275 Invalid, 0 Unknown, 148 Unchecked, 1.2s Time] [2022-11-20 21:32:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4087 states. [2022-11-20 21:32:28,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4087 to 3684. [2022-11-20 21:32:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3684 states, 3672 states have (on average 2.9722222222222223) internal successors, (10914), 3683 states have internal predecessors, (10914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 10914 transitions. [2022-11-20 21:32:28,590 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 10914 transitions. Word has length 23 [2022-11-20 21:32:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:28,590 INFO L495 AbstractCegarLoop]: Abstraction has 3684 states and 10914 transitions. [2022-11-20 21:32:28,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 10914 transitions. [2022-11-20 21:32:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 21:32:28,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:28,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:28,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:28,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 21:32:28,803 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2121434346, now seen corresponding path program 1 times [2022-11-20 21:32:28,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:28,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365752344] [2022-11-20 21:32:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:28,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:28,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:28,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096957319] [2022-11-20 21:32:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:28,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:28,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:28,824 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:28,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 21:32:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:29,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:32:29,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:32:29,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:32:29,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:29,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365752344] [2022-11-20 21:32:29,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:29,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096957319] [2022-11-20 21:32:29,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096957319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:29,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1271449192] [2022-11-20 21:32:29,689 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:29,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:29,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 21:32:29,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939559768] [2022-11-20 21:32:29,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:29,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:32:29,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:32:29,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:32:29,692 INFO L87 Difference]: Start difference. First operand 3684 states and 10914 transitions. Second operand has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 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) [2022-11-20 21:32:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:30,318 INFO L93 Difference]: Finished difference Result 8276 states and 24262 transitions. [2022-11-20 21:32:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 21:32:30,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 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 23 [2022-11-20 21:32:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:30,335 INFO L225 Difference]: With dead ends: 8276 [2022-11-20 21:32:30,336 INFO L226 Difference]: Without dead ends: 8090 [2022-11-20 21:32:30,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:32:30,337 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 177 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:30,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 23 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 174 Invalid, 0 Unknown, 155 Unchecked, 0.5s Time] [2022-11-20 21:32:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2022-11-20 21:32:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 5388. [2022-11-20 21:32:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5388 states, 5376 states have (on average 3.0316220238095237) internal successors, (16298), 5387 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 16298 transitions. [2022-11-20 21:32:30,484 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 16298 transitions. Word has length 23 [2022-11-20 21:32:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:30,484 INFO L495 AbstractCegarLoop]: Abstraction has 5388 states and 16298 transitions. [2022-11-20 21:32:30,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 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) [2022-11-20 21:32:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 16298 transitions. [2022-11-20 21:32:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 21:32:30,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:30,525 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:30,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:30,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 21:32:30,726 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:30,726 INFO L85 PathProgramCache]: Analyzing trace with hash -563884801, now seen corresponding path program 2 times [2022-11-20 21:32:30,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:30,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682205929] [2022-11-20 21:32:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:30,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:30,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:30,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403534600] [2022-11-20 21:32:30,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:32:30,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:30,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:30,748 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:30,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 21:32:31,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:32:31,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:32:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:32:31,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 21:32:32,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 21:32:32,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:32,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682205929] [2022-11-20 21:32:32,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:32,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403534600] [2022-11-20 21:32:32,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403534600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:32,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [493868355] [2022-11-20 21:32:32,699 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:32,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:32,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 21:32:32,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050653686] [2022-11-20 21:32:32,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:32,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:32:32,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:32,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:32:32,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:32:32,701 INFO L87 Difference]: Start difference. First operand 5388 states and 16298 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:32,897 INFO L93 Difference]: Finished difference Result 6937 states and 20673 transitions. [2022-11-20 21:32:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:32:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 21:32:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:32,912 INFO L225 Difference]: With dead ends: 6937 [2022-11-20 21:32:32,912 INFO L226 Difference]: Without dead ends: 6868 [2022-11-20 21:32:32,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:32:32,913 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:32,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-20 21:32:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6868 states. [2022-11-20 21:32:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6868 to 5545. [2022-11-20 21:32:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5545 states, 5533 states have (on average 3.0229531899512017) internal successors, (16726), 5544 states have internal predecessors, (16726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5545 states to 5545 states and 16726 transitions. [2022-11-20 21:32:33,044 INFO L78 Accepts]: Start accepts. Automaton has 5545 states and 16726 transitions. Word has length 24 [2022-11-20 21:32:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:33,044 INFO L495 AbstractCegarLoop]: Abstraction has 5545 states and 16726 transitions. [2022-11-20 21:32:33,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 5545 states and 16726 transitions. [2022-11-20 21:32:33,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 21:32:33,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:33,048 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:33,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:33,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 21:32:33,255 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash 628912523, now seen corresponding path program 1 times [2022-11-20 21:32:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:33,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448433288] [2022-11-20 21:32:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:33,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:33,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919722108] [2022-11-20 21:32:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:33,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:33,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:33,274 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:33,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 21:32:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:32:33,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:32:33,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:32:33,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:32:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:32:33,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:32:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448433288] [2022-11-20 21:32:33,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:32:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919722108] [2022-11-20 21:32:33,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919722108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:32:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [669409217] [2022-11-20 21:32:33,872 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:32:33,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:32:33,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-20 21:32:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115073113] [2022-11-20 21:32:33,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:32:33,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 21:32:33,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:32:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 21:32:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-11-20 21:32:33,874 INFO L87 Difference]: Start difference. First operand 5545 states and 16726 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 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) [2022-11-20 21:32:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:32:35,051 INFO L93 Difference]: Finished difference Result 10187 states and 29070 transitions. [2022-11-20 21:32:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 21:32:35,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 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 24 [2022-11-20 21:32:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:32:35,071 INFO L225 Difference]: With dead ends: 10187 [2022-11-20 21:32:35,071 INFO L226 Difference]: Without dead ends: 9776 [2022-11-20 21:32:35,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2022-11-20 21:32:35,072 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 291 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:32:35,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 65 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 21:32:35,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9776 states. [2022-11-20 21:32:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9776 to 6230. [2022-11-20 21:32:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6230 states, 6218 states have (on average 3.0365069154068833) internal successors, (18881), 6229 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:32:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6230 states to 6230 states and 18881 transitions. [2022-11-20 21:32:35,272 INFO L78 Accepts]: Start accepts. Automaton has 6230 states and 18881 transitions. Word has length 24 [2022-11-20 21:32:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:32:35,272 INFO L495 AbstractCegarLoop]: Abstraction has 6230 states and 18881 transitions. [2022-11-20 21:32:35,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 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) [2022-11-20 21:32:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 6230 states and 18881 transitions. [2022-11-20 21:32:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 21:32:35,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:32:35,274 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:32:35,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-20 21:32:35,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:35,479 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:32:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:32:35,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1240215141, now seen corresponding path program 2 times [2022-11-20 21:32:35,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:32:35,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454393152] [2022-11-20 21:32:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:32:35,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:32:35,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:32:35,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612042735] [2022-11-20 21:32:35,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:32:35,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:32:35,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:32:35,498 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:32:35,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 21:32:36,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:32:36,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:32:36,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 21:32:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:33:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 21:33:04,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:33:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 21:33:06,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:33:06,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454393152] [2022-11-20 21:33:06,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:33:06,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612042735] [2022-11-20 21:33:06,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612042735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:33:06,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [649036706] [2022-11-20 21:33:06,570 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:33:06,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:33:06,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 21:33:06,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060629874] [2022-11-20 21:33:06,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:33:06,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:33:06,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:33:06,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:33:06,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:33:06,573 INFO L87 Difference]: Start difference. First operand 6230 states and 18881 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2022-11-20 21:33:21,897 WARN L233 SmtUtils]: Spent 11.02s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:33:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:33:26,828 INFO L93 Difference]: Finished difference Result 6591 states and 19613 transitions. [2022-11-20 21:33:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:33:26,829 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 24 [2022-11-20 21:33:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:33:26,842 INFO L225 Difference]: With dead ends: 6591 [2022-11-20 21:33:26,842 INFO L226 Difference]: Without dead ends: 6341 [2022-11-20 21:33:26,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:33:26,843 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 138 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:33:26,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 9 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 59 Unchecked, 0.7s Time] [2022-11-20 21:33:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6341 states. [2022-11-20 21:33:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6341 to 5401. [2022-11-20 21:33:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 5393 states have (on average 3.0298535138142038) internal successors, (16340), 5400 states have internal predecessors, (16340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 16340 transitions. [2022-11-20 21:33:26,975 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 16340 transitions. Word has length 24 [2022-11-20 21:33:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:33:26,976 INFO L495 AbstractCegarLoop]: Abstraction has 5401 states and 16340 transitions. [2022-11-20 21:33:26,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2022-11-20 21:33:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 16340 transitions. [2022-11-20 21:33:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 21:33:26,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:33:26,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:33:26,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-20 21:33:27,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-20 21:33:27,187 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:33:27,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:33:27,187 INFO L85 PathProgramCache]: Analyzing trace with hash 323040408, now seen corresponding path program 1 times [2022-11-20 21:33:27,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:33:27,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100781231] [2022-11-20 21:33:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:27,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:33:27,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:33:27,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420276361] [2022-11-20 21:33:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:27,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:33:27,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:33:27,208 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:33:27,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-20 21:33:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:33:27,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:33:27,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:33:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:33:27,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:33:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:33:28,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:33:28,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100781231] [2022-11-20 21:33:28,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:33:28,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420276361] [2022-11-20 21:33:28,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420276361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:33:28,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927694283] [2022-11-20 21:33:28,389 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:33:28,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:33:28,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 21:33:28,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701551443] [2022-11-20 21:33:28,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:33:28,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:33:28,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:33:28,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:33:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:33:28,392 INFO L87 Difference]: Start difference. First operand 5401 states and 16340 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 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) [2022-11-20 21:33:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:33:28,961 INFO L93 Difference]: Finished difference Result 5817 states and 17101 transitions. [2022-11-20 21:33:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:33:28,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 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 25 [2022-11-20 21:33:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:33:28,972 INFO L225 Difference]: With dead ends: 5817 [2022-11-20 21:33:28,972 INFO L226 Difference]: Without dead ends: 5588 [2022-11-20 21:33:28,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:33:28,973 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 101 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:33:28,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 18 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-11-20 21:33:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5588 states. [2022-11-20 21:33:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5588 to 3364. [2022-11-20 21:33:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 3358 states have (on average 2.8978558665872542) internal successors, (9731), 3363 states have internal predecessors, (9731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 9731 transitions. [2022-11-20 21:33:29,073 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 9731 transitions. Word has length 25 [2022-11-20 21:33:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:33:29,073 INFO L495 AbstractCegarLoop]: Abstraction has 3364 states and 9731 transitions. [2022-11-20 21:33:29,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 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) [2022-11-20 21:33:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 9731 transitions. [2022-11-20 21:33:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 21:33:29,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:33:29,076 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:33:29,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-20 21:33:29,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-20 21:33:29,285 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:33:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:33:29,285 INFO L85 PathProgramCache]: Analyzing trace with hash -450436850, now seen corresponding path program 2 times [2022-11-20 21:33:29,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:33:29,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336513492] [2022-11-20 21:33:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:29,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:33:29,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:33:29,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874179280] [2022-11-20 21:33:29,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:33:29,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:33:29,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:33:29,306 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:33:29,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 21:33:29,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:33:29,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:33:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:33:29,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:33:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 21:33:30,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:33:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 21:33:30,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:33:30,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336513492] [2022-11-20 21:33:30,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:33:30,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874179280] [2022-11-20 21:33:30,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874179280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:33:30,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1799409028] [2022-11-20 21:33:30,743 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:33:30,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:33:30,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 21:33:30,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185201369] [2022-11-20 21:33:30,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:33:30,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:33:30,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:33:30,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:33:30,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:33:30,745 INFO L87 Difference]: Start difference. First operand 3364 states and 9731 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:33:30,940 INFO L93 Difference]: Finished difference Result 3408 states and 9812 transitions. [2022-11-20 21:33:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:33:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 21:33:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:33:30,946 INFO L225 Difference]: With dead ends: 3408 [2022-11-20 21:33:30,946 INFO L226 Difference]: Without dead ends: 3408 [2022-11-20 21:33:30,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:33:30,947 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:33:30,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 25 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 115 Unchecked, 0.1s Time] [2022-11-20 21:33:30,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-11-20 21:33:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 3362. [2022-11-20 21:33:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3362 states, 3356 states have (on average 2.8977949940405243) internal successors, (9725), 3361 states have internal predecessors, (9725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:30,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 9725 transitions. [2022-11-20 21:33:30,997 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 9725 transitions. Word has length 26 [2022-11-20 21:33:30,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:33:30,997 INFO L495 AbstractCegarLoop]: Abstraction has 3362 states and 9725 transitions. [2022-11-20 21:33:30,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:30,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 9725 transitions. [2022-11-20 21:33:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 21:33:31,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:33:31,000 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:33:31,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-20 21:33:31,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:33:31,207 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:33:31,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:33:31,207 INFO L85 PathProgramCache]: Analyzing trace with hash 599349638, now seen corresponding path program 1 times [2022-11-20 21:33:31,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:33:31,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950895267] [2022-11-20 21:33:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:31,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:33:31,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:33:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934260595] [2022-11-20 21:33:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:31,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:33:31,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:33:31,252 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:33:31,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-20 21:33:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:33:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:33:31,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:33:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:33:31,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:33:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:33:32,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:33:32,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950895267] [2022-11-20 21:33:32,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:33:32,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934260595] [2022-11-20 21:33:32,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934260595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:33:32,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [619935140] [2022-11-20 21:33:32,235 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:33:32,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:33:32,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-11-20 21:33:32,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606376297] [2022-11-20 21:33:32,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:33:32,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 21:33:32,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:33:32,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 21:33:32,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:33:32,239 INFO L87 Difference]: Start difference. First operand 3362 states and 9725 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2022-11-20 21:33:33,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:33:33,781 INFO L93 Difference]: Finished difference Result 6992 states and 19338 transitions. [2022-11-20 21:33:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 21:33:33,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 27 [2022-11-20 21:33:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:33:33,793 INFO L225 Difference]: With dead ends: 6992 [2022-11-20 21:33:33,793 INFO L226 Difference]: Without dead ends: 6434 [2022-11-20 21:33:33,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 21:33:33,795 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 341 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:33:33,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 63 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 21:33:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6434 states. [2022-11-20 21:33:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6434 to 3704. [2022-11-20 21:33:33,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3698 states have (on average 2.9050838290968093) internal successors, (10743), 3703 states have internal predecessors, (10743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 10743 transitions. [2022-11-20 21:33:33,922 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 10743 transitions. Word has length 27 [2022-11-20 21:33:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:33:33,922 INFO L495 AbstractCegarLoop]: Abstraction has 3704 states and 10743 transitions. [2022-11-20 21:33:33,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2022-11-20 21:33:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 10743 transitions. [2022-11-20 21:33:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 21:33:33,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:33:33,926 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:33:33,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-20 21:33:34,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-20 21:33:34,133 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:33:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:33:34,133 INFO L85 PathProgramCache]: Analyzing trace with hash -89638000, now seen corresponding path program 1 times [2022-11-20 21:33:34,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:33:34,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347673939] [2022-11-20 21:33:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:33:34,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:33:34,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846008092] [2022-11-20 21:33:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:34,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:33:34,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:33:34,154 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:33:34,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-20 21:33:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:33:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:33:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:33:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:33:34,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:33:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:33:34,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:33:34,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347673939] [2022-11-20 21:33:34,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:33:34,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846008092] [2022-11-20 21:33:34,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846008092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:33:34,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [504024207] [2022-11-20 21:33:34,871 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:33:34,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:33:34,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-20 21:33:34,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709546501] [2022-11-20 21:33:34,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:33:34,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:33:34,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:33:34,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:33:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:33:34,873 INFO L87 Difference]: Start difference. First operand 3704 states and 10743 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:38,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:33:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:33:38,089 INFO L93 Difference]: Finished difference Result 4218 states and 11690 transitions. [2022-11-20 21:33:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 21:33:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 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 28 [2022-11-20 21:33:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:33:38,097 INFO L225 Difference]: With dead ends: 4218 [2022-11-20 21:33:38,097 INFO L226 Difference]: Without dead ends: 4207 [2022-11-20 21:33:38,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2022-11-20 21:33:38,098 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 144 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:33:38,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 25 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-20 21:33:38,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4207 states. [2022-11-20 21:33:38,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4207 to 3862. [2022-11-20 21:33:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3862 states, 3856 states have (on average 2.850103734439834) internal successors, (10990), 3861 states have internal predecessors, (10990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3862 states to 3862 states and 10990 transitions. [2022-11-20 21:33:38,158 INFO L78 Accepts]: Start accepts. Automaton has 3862 states and 10990 transitions. Word has length 28 [2022-11-20 21:33:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:33:38,158 INFO L495 AbstractCegarLoop]: Abstraction has 3862 states and 10990 transitions. [2022-11-20 21:33:38,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3862 states and 10990 transitions. [2022-11-20 21:33:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 21:33:38,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:33:38,178 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:33:38,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-20 21:33:38,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-20 21:33:38,378 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:33:38,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:33:38,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2135631749, now seen corresponding path program 2 times [2022-11-20 21:33:38,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:33:38,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384178196] [2022-11-20 21:33:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:38,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:33:38,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:33:38,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339996255] [2022-11-20 21:33:38,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:33:38,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:33:38,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:33:38,397 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:33:38,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-20 21:33:38,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:33:38,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:33:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:33:38,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:33:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:33:38,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:33:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:33:38,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:33:38,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384178196] [2022-11-20 21:33:38,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:33:38,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339996255] [2022-11-20 21:33:38,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339996255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:33:38,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [989924229] [2022-11-20 21:33:38,929 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:33:38,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:33:38,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2022-11-20 21:33:38,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308948716] [2022-11-20 21:33:38,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:33:38,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:33:38,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:33:38,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:33:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:33:38,931 INFO L87 Difference]: Start difference. First operand 3862 states and 10990 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-11-20 21:33:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:33:39,062 INFO L93 Difference]: Finished difference Result 3827 states and 10747 transitions. [2022-11-20 21:33:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:33:39,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 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 28 [2022-11-20 21:33:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:33:39,069 INFO L225 Difference]: With dead ends: 3827 [2022-11-20 21:33:39,070 INFO L226 Difference]: Without dead ends: 3242 [2022-11-20 21:33:39,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:33:39,072 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:33:39,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 5 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:33:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2022-11-20 21:33:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2123. [2022-11-20 21:33:39,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2119 states have (on average 2.6588013213780086) internal successors, (5634), 2122 states have internal predecessors, (5634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 5634 transitions. [2022-11-20 21:33:39,124 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 5634 transitions. Word has length 28 [2022-11-20 21:33:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:33:39,125 INFO L495 AbstractCegarLoop]: Abstraction has 2123 states and 5634 transitions. [2022-11-20 21:33:39,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-11-20 21:33:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 5634 transitions. [2022-11-20 21:33:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 21:33:39,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:33:39,127 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:33:39,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-20 21:33:39,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-20 21:33:39,334 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:33:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:33:39,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1181372855, now seen corresponding path program 2 times [2022-11-20 21:33:39,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:33:39,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106997434] [2022-11-20 21:33:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:39,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:33:39,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:33:39,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440987290] [2022-11-20 21:33:39,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:33:39,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:33:39,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:33:39,357 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:33:39,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-20 21:33:40,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:33:40,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:33:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:33:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:33:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 21:33:46,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:33:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 21:33:48,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:33:48,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106997434] [2022-11-20 21:33:48,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:33:48,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440987290] [2022-11-20 21:33:48,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440987290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:33:48,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [312228922] [2022-11-20 21:33:48,361 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:33:48,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:33:48,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 21:33:48,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252407366] [2022-11-20 21:33:48,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:33:48,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:33:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:33:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:33:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=33, Unknown=2, NotChecked=0, Total=56 [2022-11-20 21:33:48,363 INFO L87 Difference]: Start difference. First operand 2123 states and 5634 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:33:51,948 INFO L93 Difference]: Finished difference Result 2144 states and 5675 transitions. [2022-11-20 21:33:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:33:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 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 29 [2022-11-20 21:33:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:33:51,953 INFO L225 Difference]: With dead ends: 2144 [2022-11-20 21:33:51,953 INFO L226 Difference]: Without dead ends: 2144 [2022-11-20 21:33:51,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=29, Invalid=41, Unknown=2, NotChecked=0, Total=72 [2022-11-20 21:33:51,953 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:33:51,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2022-11-20 21:33:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2022-11-20 21:33:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2135. [2022-11-20 21:33:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2131 states have (on average 2.654622243078367) internal successors, (5657), 2134 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 5657 transitions. [2022-11-20 21:33:51,985 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 5657 transitions. Word has length 29 [2022-11-20 21:33:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:33:51,985 INFO L495 AbstractCegarLoop]: Abstraction has 2135 states and 5657 transitions. [2022-11-20 21:33:51,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:51,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 5657 transitions. [2022-11-20 21:33:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 21:33:51,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:33:51,987 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:33:51,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-20 21:33:52,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:33:52,187 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:33:52,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:33:52,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1435603310, now seen corresponding path program 1 times [2022-11-20 21:33:52,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:33:52,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174826409] [2022-11-20 21:33:52,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:52,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:33:52,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:33:52,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307732392] [2022-11-20 21:33:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:52,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:33:52,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:33:52,211 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:33:52,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-20 21:33:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:33:52,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 21:33:52,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:33:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 21:33:52,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:33:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 21:33:52,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:33:52,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174826409] [2022-11-20 21:33:52,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:33:52,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307732392] [2022-11-20 21:33:52,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307732392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:33:52,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637706627] [2022-11-20 21:33:52,790 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:33:52,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:33:52,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-20 21:33:52,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286358288] [2022-11-20 21:33:52,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:33:52,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:33:52,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:33:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:33:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:33:52,791 INFO L87 Difference]: Start difference. First operand 2135 states and 5657 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 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) [2022-11-20 21:33:53,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:33:53,235 INFO L93 Difference]: Finished difference Result 5479 states and 14240 transitions. [2022-11-20 21:33:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:33:53,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 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 29 [2022-11-20 21:33:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:33:53,243 INFO L225 Difference]: With dead ends: 5479 [2022-11-20 21:33:53,243 INFO L226 Difference]: Without dead ends: 5467 [2022-11-20 21:33:53,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:33:53,244 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 255 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:33:53,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 16 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:33:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2022-11-20 21:33:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 3515. [2022-11-20 21:33:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3515 states, 3511 states have (on average 2.663913414981487) internal successors, (9353), 3514 states have internal predecessors, (9353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:33:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 9353 transitions. [2022-11-20 21:33:53,326 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 9353 transitions. Word has length 29 [2022-11-20 21:33:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:33:53,326 INFO L495 AbstractCegarLoop]: Abstraction has 3515 states and 9353 transitions. [2022-11-20 21:33:53,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 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) [2022-11-20 21:33:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 9353 transitions. [2022-11-20 21:33:53,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 21:33:53,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:33:53,329 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:33:53,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-20 21:33:53,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-20 21:33:53,530 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:33:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:33:53,530 INFO L85 PathProgramCache]: Analyzing trace with hash 500025329, now seen corresponding path program 2 times [2022-11-20 21:33:53,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:33:53,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186776335] [2022-11-20 21:33:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:33:53,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:33:53,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:33:53,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152737873] [2022-11-20 21:33:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:33:53,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:33:53,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:33:53,552 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:33:53,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-20 21:33:54,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:33:54,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:33:54,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:33:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:34:11,286 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:34:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 21:34:11,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:34:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 21:34:12,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:34:12,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186776335] [2022-11-20 21:34:12,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:34:12,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152737873] [2022-11-20 21:34:12,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152737873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:34:12,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [794145062] [2022-11-20 21:34:12,720 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:34:12,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:34:12,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 21:34:12,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081063856] [2022-11-20 21:34:12,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:34:12,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:34:12,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:34:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:34:12,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=35, Unknown=2, NotChecked=0, Total=56 [2022-11-20 21:34:12,721 INFO L87 Difference]: Start difference. First operand 3515 states and 9353 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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) [2022-11-20 21:34:19,997 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~N~0 c_~M~0))) (and (<= (mod .cse0 4294967296) 1073741823) (or (exists ((~N~0 Int)) (and (< c_thread2Thread1of1ForFork0_~i~1 ~N~0) (<= (mod (* ~N~0 c_~M~0) 4294967296) 1073741823) (<= c_~M~0 (div 2147483647 ~N~0)))) (< c_thread2Thread1of1ForFork0_~i~1 0)) (<= c_~M~0 2147483647) (or (= c_~N~0 0) (<= c_~M~0 (div 2147483647 c_~N~0))) (<= 0 c_~M~0) (= c_~L~0 .cse0))) is different from true [2022-11-20 21:34:30,271 WARN L233 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:34:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:34:30,664 INFO L93 Difference]: Finished difference Result 7472 states and 20044 transitions. [2022-11-20 21:34:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:34:30,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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 31 [2022-11-20 21:34:30,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:34:30,678 INFO L225 Difference]: With dead ends: 7472 [2022-11-20 21:34:30,678 INFO L226 Difference]: Without dead ends: 7455 [2022-11-20 21:34:30,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=42, Invalid=67, Unknown=5, NotChecked=18, Total=132 [2022-11-20 21:34:30,679 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:34:30,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 9 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-20 21:34:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7455 states. [2022-11-20 21:34:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7455 to 5054. [2022-11-20 21:34:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5054 states, 5050 states have (on average 2.7746534653465345) internal successors, (14012), 5053 states have internal predecessors, (14012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:34:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 14012 transitions. [2022-11-20 21:34:30,797 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 14012 transitions. Word has length 31 [2022-11-20 21:34:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:34:30,797 INFO L495 AbstractCegarLoop]: Abstraction has 5054 states and 14012 transitions. [2022-11-20 21:34:30,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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) [2022-11-20 21:34:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 14012 transitions. [2022-11-20 21:34:30,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 21:34:30,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:34:30,800 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:34:30,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-20 21:34:31,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-20 21:34:31,003 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:34:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:34:31,003 INFO L85 PathProgramCache]: Analyzing trace with hash -353646974, now seen corresponding path program 1 times [2022-11-20 21:34:31,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:34:31,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104491807] [2022-11-20 21:34:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:34:31,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:34:31,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:34:31,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681111758] [2022-11-20 21:34:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:34:31,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:34:31,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:34:31,052 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:34:31,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-20 21:34:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:34:32,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:34:32,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:34:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:34:32,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:34:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:34:32,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:34:32,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104491807] [2022-11-20 21:34:32,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:34:32,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681111758] [2022-11-20 21:34:32,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681111758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:34:32,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [245602851] [2022-11-20 21:34:32,765 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:34:32,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:34:32,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 21:34:32,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270013547] [2022-11-20 21:34:32,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:34:32,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 21:34:32,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:34:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 21:34:32,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-11-20 21:34:32,768 INFO L87 Difference]: Start difference. First operand 5054 states and 14012 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:34:38,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:34:39,180 INFO L93 Difference]: Finished difference Result 30348 states and 86643 transitions. [2022-11-20 21:34:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 21:34:39,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 18 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 32 [2022-11-20 21:34:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:34:39,239 INFO L225 Difference]: With dead ends: 30348 [2022-11-20 21:34:39,239 INFO L226 Difference]: Without dead ends: 24506 [2022-11-20 21:34:39,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1380, Invalid=3590, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 21:34:39,241 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 599 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:34:39,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 100 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 952 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-20 21:34:39,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24506 states. [2022-11-20 21:34:39,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24506 to 7938. [2022-11-20 21:34:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7938 states, 7934 states have (on average 2.804386186034787) internal successors, (22250), 7937 states have internal predecessors, (22250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:34:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7938 states to 7938 states and 22250 transitions. [2022-11-20 21:34:39,585 INFO L78 Accepts]: Start accepts. Automaton has 7938 states and 22250 transitions. Word has length 32 [2022-11-20 21:34:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:34:39,586 INFO L495 AbstractCegarLoop]: Abstraction has 7938 states and 22250 transitions. [2022-11-20 21:34:39,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 18 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) [2022-11-20 21:34:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 7938 states and 22250 transitions. [2022-11-20 21:34:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 21:34:39,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:34:39,592 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:34:39,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-20 21:34:39,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:34:39,793 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-20 21:34:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:34:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash 377867113, now seen corresponding path program 2 times [2022-11-20 21:34:39,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:34:39,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853067796] [2022-11-20 21:34:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:34:39,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:34:39,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:34:39,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078125167] [2022-11-20 21:34:39,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:34:39,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:34:39,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:34:39,862 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:34:39,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-20 21:34:41,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:34:41,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:34:41,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:34:41,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:34:49,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 139 [2022-11-20 21:34:49,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:34:49,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853067796] [2022-11-20 21:34:49,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:34:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078125167] [2022-11-20 21:34:49,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. [2022-11-20 21:34:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457807623] [2022-11-20 21:34:49,822 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 21:34:49,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:34:49,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-11-20 21:34:49,822 ERROR L170 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2022-11-20 21:34:49,823 INFO L359 BasicCegarLoop]: Counterexample might be feasible [2022-11-20 21:34:49,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (37 of 38 remaining) [2022-11-20 21:34:49,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (36 of 38 remaining) [2022-11-20 21:34:49,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (35 of 38 remaining) [2022-11-20 21:34:49,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (34 of 38 remaining) [2022-11-20 21:34:49,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (33 of 38 remaining) [2022-11-20 21:34:49,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (32 of 38 remaining) [2022-11-20 21:34:49,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (31 of 38 remaining) [2022-11-20 21:34:49,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (30 of 38 remaining) [2022-11-20 21:34:49,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 38 remaining) [2022-11-20 21:34:49,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 38 remaining) [2022-11-20 21:34:49,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 38 remaining) [2022-11-20 21:34:49,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 38 remaining) [2022-11-20 21:34:49,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 38 remaining) [2022-11-20 21:34:49,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 38 remaining) [2022-11-20 21:34:49,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 38 remaining) [2022-11-20 21:34:49,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 38 remaining) [2022-11-20 21:34:49,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 38 remaining) [2022-11-20 21:34:49,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 38 remaining) [2022-11-20 21:34:49,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 38 remaining) [2022-11-20 21:34:49,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 38 remaining) [2022-11-20 21:34:49,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 38 remaining) [2022-11-20 21:34:49,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 38 remaining) [2022-11-20 21:34:49,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 38 remaining) [2022-11-20 21:34:49,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 38 remaining) [2022-11-20 21:34:49,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 38 remaining) [2022-11-20 21:34:49,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 38 remaining) [2022-11-20 21:34:49,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 38 remaining) [2022-11-20 21:34:49,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 38 remaining) [2022-11-20 21:34:49,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 38 remaining) [2022-11-20 21:34:49,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 38 remaining) [2022-11-20 21:34:49,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 38 remaining) [2022-11-20 21:34:49,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 38 remaining) [2022-11-20 21:34:49,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 38 remaining) [2022-11-20 21:34:49,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 38 remaining) [2022-11-20 21:34:49,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 38 remaining) [2022-11-20 21:34:49,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 38 remaining) [2022-11-20 21:34:49,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 38 remaining) [2022-11-20 21:34:49,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 38 remaining) [2022-11-20 21:34:49,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-20 21:34:50,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:34:50,045 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:34:50,051 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-20 21:34:50,051 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 21:34:50,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:34:50 BasicIcfg [2022-11-20 21:34:50,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 21:34:50,089 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 21:34:50,089 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 21:34:50,089 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 21:34:50,090 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:31:06" (3/4) ... [2022-11-20 21:34:50,092 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 21:34:50,092 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 21:34:50,092 INFO L158 Benchmark]: Toolchain (without parser) took 225445.30ms. Allocated memory was 155.2MB in the beginning and 390.1MB in the end (delta: 234.9MB). Free memory was 110.3MB in the beginning and 153.4MB in the end (delta: -43.1MB). Peak memory consumption was 192.3MB. Max. memory is 16.1GB. [2022-11-20 21:34:50,092 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 155.2MB. Free memory is still 97.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:34:50,093 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.59ms. Allocated memory is still 155.2MB. Free memory was 110.3MB in the beginning and 98.7MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 21:34:50,093 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.18ms. Allocated memory is still 155.2MB. Free memory was 98.7MB in the beginning and 96.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:34:50,093 INFO L158 Benchmark]: Boogie Preprocessor took 88.40ms. Allocated memory is still 155.2MB. Free memory was 96.1MB in the beginning and 94.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:34:50,093 INFO L158 Benchmark]: RCFGBuilder took 1014.82ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 94.1MB in the beginning and 156.3MB in the end (delta: -62.3MB). Peak memory consumption was 33.7MB. Max. memory is 16.1GB. [2022-11-20 21:34:50,094 INFO L158 Benchmark]: TraceAbstraction took 223943.05ms. Allocated memory was 186.6MB in the beginning and 390.1MB in the end (delta: 203.4MB). Free memory was 155.6MB in the beginning and 153.4MB in the end (delta: 2.2MB). Peak memory consumption was 204.8MB. Max. memory is 16.1GB. [2022-11-20 21:34:50,094 INFO L158 Benchmark]: Witness Printer took 2.82ms. Allocated memory is still 390.1MB. Free memory is still 153.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:34:50,095 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 155.2MB. Free memory is still 97.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.59ms. Allocated memory is still 155.2MB. Free memory was 110.3MB in the beginning and 98.7MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.18ms. Allocated memory is still 155.2MB. Free memory was 98.7MB in the beginning and 96.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 88.40ms. Allocated memory is still 155.2MB. Free memory was 96.1MB in the beginning and 94.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1014.82ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 94.1MB in the beginning and 156.3MB in the end (delta: -62.3MB). Peak memory consumption was 33.7MB. Max. memory is 16.1GB. * TraceAbstraction took 223943.05ms. Allocated memory was 186.6MB in the beginning and 390.1MB in the end (delta: 203.4MB). Free memory was 155.6MB in the beginning and 153.4MB in the end (delta: 2.2MB). Peak memory consumption was 204.8MB. Max. memory is 16.1GB. * Witness Printer took 2.82ms. Allocated memory is still 390.1MB. Free memory is still 153.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 43.9s, 315 PlacesBefore, 56 PlacesAfterwards, 335 TransitionsBefore, 56 TransitionsAfterwards, 1916 CoEnabledTransitionPairs, 9 FixpointIterations, 268 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 60 TrivialYvCompositions, 6 ConcurrentYvCompositions, 20 ChoiceCompositions, 404 TotalNumberOfCompositions, 4017 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2671, independent: 2516, independent conditional: 0, independent unconditional: 2516, dependent: 130, dependent conditional: 0, dependent unconditional: 130, unknown: 25, unknown conditional: 0, unknown unconditional: 25] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1260, independent: 1229, independent conditional: 0, independent unconditional: 1229, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 5, unknown conditional: 0, unknown unconditional: 5] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1260, independent: 1229, independent conditional: 0, independent unconditional: 1229, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 31, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 5, unknown conditional: 0, unknown unconditional: 5] , SemanticIndependenceRelation.Query Time [ms]: [ total: 10684, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 112, dependent conditional: 0, dependent unconditional: 112, unknown: 10572, unknown conditional: 0, unknown unconditional: 10572] ], Cache Queries: [ total: 2671, independent: 1287, independent conditional: 0, independent unconditional: 1287, dependent: 104, dependent conditional: 0, dependent unconditional: 104, unknown: 1280, unknown conditional: 0, unknown unconditional: 1280] , Statistics on independence cache: Total cache size (in pairs): 110, Positive cache size: 100, Positive conditional cache size: 0, Positive unconditional cache size: 100, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 3, Unknown conditional cache size: 0, Unknown unconditional cache size: 3 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 58]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L40] 0 int** B; [L41] 0 int* A; [L42] 0 int* F; [L43] 0 int L, N, M, a, b; [L66] 0 pthread_t t1, t2; [L69] 0 M = __VERIFIER_nondet_int() [L70] CALL 0 assume_abort_if_not(M >= 0) [L37] COND FALSE 0 !(!cond) [L70] RET 0 assume_abort_if_not(M >= 0) [L71] 0 N = __VERIFIER_nondet_int() [L72] CALL 0 assume_abort_if_not(N >= 0) [L37] COND TRUE 0 !cond [L72] RET 0 assume_abort_if_not(N >= 0) [L74] EXPR 0 N == 0 || M <= 2147483647 / N [L74] EXPR 0 2147483647 / N [L74] EXPR 0 N == 0 || M <= 2147483647 / N [L74] CALL 0 assume_abort_if_not(N == 0 || M <= 2147483647 / N) [L37] COND TRUE 0 !cond [L74] RET 0 assume_abort_if_not(N == 0 || M <= 2147483647 / N) [L75] EXPR 0 M * N [L75] 0 L = M * N [L76] CALL, EXPR 0 create_fresh_int_array(L) [L100] CALL 0 assume_abort_if_not(size >= 0) [L37] COND TRUE 0 !cond [L100] RET 0 assume_abort_if_not(size >= 0) [L101] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L37] COND TRUE 0 !cond [L101] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L103] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L104] 0 int i = 0; [L104] COND TRUE 0 i < size [L105] 0 arr[i] = __VERIFIER_nondet_int() [L104] 0 i++ [L104] COND FALSE 0 !(i < size) [L107] 0 return arr; [L76] RET, EXPR 0 create_fresh_int_array(L) [L76] 0 A = create_fresh_int_array(L) [L77] CALL, EXPR 0 create_fresh_int_array(L) [L100] CALL 0 assume_abort_if_not(size >= 0) [L37] COND TRUE 0 !cond [L100] RET 0 assume_abort_if_not(size >= 0) [L101] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L37] COND TRUE 0 !cond [L101] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L103] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L104] 0 int i = 0; [L104] COND TRUE 0 i < size [L105] 0 arr[i] = __VERIFIER_nondet_int() [L104] 0 i++ [L107] 0 return arr; [L77] RET, EXPR 0 create_fresh_int_array(L) [L77] 0 F = create_fresh_int_array(L) [L78] CALL 0 assume_abort_if_not(N <= (((size_t) 4294967295) / sizeof(int*))) [L37] COND FALSE 0 !(!cond) [L78] RET 0 assume_abort_if_not(N <= (((size_t) 4294967295) / sizeof(int*))) [L79] 0 B = (int**)malloc(sizeof(int*) * (size_t)N) [L80] 0 int i=0; [L80] COND TRUE 0 i= 0) [L37] COND TRUE 0 !cond [L100] RET 0 assume_abort_if_not(size >= 0) [L101] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L37] COND TRUE 0 !cond [L101] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L103] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L104] 0 int i = 0; [L104] COND TRUE 0 i < size [L105] 0 arr[i] = __VERIFIER_nondet_int() [L104] 0 i++ [L104] COND TRUE 0 i < size [L105] 0 arr[i] = __VERIFIER_nondet_int() [L104] 0 i++ [L104] COND TRUE 0 i < size [L105] 0 arr[i] = __VERIFIER_nondet_int() [L104] 0 i++ [L107] 0 return arr; [L81] RET, EXPR 0 create_fresh_int_array(M) [L81] 0 B[i] = create_fresh_int_array(M) [L80] 0 i++ [L80] COND TRUE 0 i= 0) [L37] COND TRUE 0 !cond [L100] RET 0 assume_abort_if_not(size >= 0) [L101] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L37] COND TRUE 0 !cond [L101] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L103] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L104] 0 int i = 0; [L104] COND TRUE 0 i < size [L105] 0 arr[i] = __VERIFIER_nondet_int() [L104] 0 i++ [L104] COND TRUE 0 i < size [L105] 0 arr[i] = __VERIFIER_nondet_int() [L104] 0 i++ [L104] COND TRUE 0 i < size [L105] 0 arr[i] = __VERIFIER_nondet_int() [L104] 0 i++ [L107] 0 return arr; [L81] RET, EXPR 0 create_fresh_int_array(M) [L81] 0 B[i] = create_fresh_int_array(M) [L80] 0 i++ [L85] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L86] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L56] 2 int i=0; [L56] COND TRUE 2 i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9 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 -> 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 [2022-11-20 21:34:53,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:34:53,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:34:53,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:34:53,167 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:34:53,168 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:34:53,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-11-20 21:34:56,198 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:34:56,558 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:34:56,559 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-11-20 21:34:56,571 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/data/a9136d543/947615ee545945b890014273ebec9019/FLAG2c8b033dd [2022-11-20 21:34:56,598 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/data/a9136d543/947615ee545945b890014273ebec9019 [2022-11-20 21:34:56,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:34:56,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:34:56,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:34:56,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:34:56,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:34:56,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:34:56" (1/1) ... [2022-11-20 21:34:56,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25426195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:56, skipping insertion in model container [2022-11-20 21:34:56,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:34:56" (1/1) ... [2022-11-20 21:34:56,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:34:56,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:34:56,968 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_4383be42-fe68-465b-8311-10eede42f58b/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-11-20 21:34:56,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:34:57,006 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 21:34:57,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:34:57,067 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_4383be42-fe68-465b-8311-10eede42f58b/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-11-20 21:34:57,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:34:57,076 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:34:57,105 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_4383be42-fe68-465b-8311-10eede42f58b/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-11-20 21:34:57,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:34:57,129 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:34:57,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57 WrapperNode [2022-11-20 21:34:57,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:34:57,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:34:57,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:34:57,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:34:57,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (1/1) ... [2022-11-20 21:34:57,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (1/1) ... [2022-11-20 21:34:57,207 INFO L138 Inliner]: procedures = 27, calls = 41, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 199 [2022-11-20 21:34:57,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:34:57,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:34:57,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:34:57,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:34:57,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (1/1) ... [2022-11-20 21:34:57,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (1/1) ... [2022-11-20 21:34:57,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (1/1) ... [2022-11-20 21:34:57,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (1/1) ... [2022-11-20 21:34:57,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (1/1) ... [2022-11-20 21:34:57,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (1/1) ... [2022-11-20 21:34:57,266 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (1/1) ... [2022-11-20 21:34:57,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (1/1) ... [2022-11-20 21:34:57,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:34:57,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:34:57,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:34:57,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:34:57,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (1/1) ... [2022-11-20 21:34:57,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:34:57,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:34:57,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:34:57,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4383be42-fe68-465b-8311-10eede42f58b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:34:57,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:34:57,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 21:34:57,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 21:34:57,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 21:34:57,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 21:34:57,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 21:34:57,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 21:34:57,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 21:34:57,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 21:34:57,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 21:34:57,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:34:57,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:34:57,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:34:57,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:34:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 21:34:57,378 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 21:34:57,517 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:34:57,519 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:34:59,778 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:34:59,792 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:34:59,793 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-20 21:34:59,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:34:59 BoogieIcfgContainer [2022-11-20 21:34:59,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:34:59,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:34:59,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:34:59,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:34:59,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:34:56" (1/3) ... [2022-11-20 21:34:59,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e8b966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:34:59, skipping insertion in model container [2022-11-20 21:34:59,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:34:57" (2/3) ... [2022-11-20 21:34:59,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e8b966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:34:59, skipping insertion in model container [2022-11-20 21:34:59,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:34:59" (3/3) ... [2022-11-20 21:34:59,812 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2022-11-20 21:34:59,824 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 21:34:59,838 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:34:59,838 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-20 21:34:59,838 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 21:35:00,009 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 21:35:00,065 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 21:35:00,083 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 308 places, 328 transitions, 672 flow [2022-11-20 21:35:00,086 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 308 places, 328 transitions, 672 flow [2022-11-20 21:35:00,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 328 transitions, 672 flow [2022-11-20 21:35:00,202 INFO L130 PetriNetUnfolder]: 27/326 cut-off events. [2022-11-20 21:35:00,203 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 21:35:00,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 326 events. 27/326 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 451 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 239. Up to 2 conditions per place. [2022-11-20 21:35:00,212 INFO L119 LiptonReduction]: Number of co-enabled transitions 1916 [2022-11-20 21:35:43,660 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:35:52,254 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:35:58,631 WARN L233 SmtUtils]: Spent 6.38s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:36:09,924 WARN L233 SmtUtils]: Spent 6.75s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:36:18,351 WARN L233 SmtUtils]: Spent 8.43s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:36:24,918 WARN L233 SmtUtils]: Spent 6.57s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:36:37,289 WARN L233 SmtUtils]: Spent 7.55s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:36:47,789 WARN L233 SmtUtils]: Spent 10.50s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:36:57,102 WARN L233 SmtUtils]: Spent 9.31s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:37:05,353 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:37:12,404 WARN L233 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:37:21,267 WARN L233 SmtUtils]: Spent 8.86s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:37:29,189 WARN L233 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:37:37,612 WARN L233 SmtUtils]: Spent 8.42s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:37:47,855 WARN L233 SmtUtils]: Spent 10.24s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:37:53,797 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:38:02,608 WARN L233 SmtUtils]: Spent 8.81s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:38:15,964 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:38:25,800 WARN L233 SmtUtils]: Spent 9.84s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:38:31,523 WARN L233 SmtUtils]: Spent 5.72s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:38:48,664 WARN L233 SmtUtils]: Spent 8.66s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:39:01,227 WARN L233 SmtUtils]: Spent 12.56s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:39:14,023 WARN L233 SmtUtils]: Spent 12.79s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:39:22,777 WARN L233 SmtUtils]: Spent 8.75s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:39:32,435 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:39:48,197 WARN L233 SmtUtils]: Spent 15.76s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:39:55,907 WARN L233 SmtUtils]: Spent 7.71s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:40:03,924 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:40:08,982 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:40:14,305 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:40:25,325 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:40:44,079 WARN L233 SmtUtils]: Spent 6.57s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:40:53,338 WARN L233 SmtUtils]: Spent 9.26s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:41:01,429 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:41:09,908 WARN L233 SmtUtils]: Spent 8.48s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:41:33,672 WARN L233 SmtUtils]: Spent 21.64s on a formula simplification. DAG size of input: 36 DAG size of output: 34 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:41:40,149 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:41:59,964 WARN L233 SmtUtils]: Spent 19.81s on a formula simplification. DAG size of input: 36 DAG size of output: 34 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:42:07,635 WARN L233 SmtUtils]: Spent 7.67s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:42:24,400 WARN L233 SmtUtils]: Spent 7.82s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:42:30,169 WARN L233 SmtUtils]: Spent 5.77s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:43:00,455 WARN L233 SmtUtils]: Spent 16.45s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:43:18,777 WARN L233 SmtUtils]: Spent 18.32s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:43:43,854 WARN L233 SmtUtils]: Spent 22.10s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:44:28,379 WARN L233 SmtUtils]: Spent 27.08s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:44:58,931 WARN L233 SmtUtils]: Spent 30.55s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:45:18,515 WARN L233 SmtUtils]: Spent 19.58s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)