./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:47:27,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:47:27,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:47:27,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:47:27,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:47:27,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:47:27,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:47:27,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:47:27,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:47:27,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:47:28,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:47:28,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:47:28,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:47:28,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:47:28,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:47:28,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:47:28,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:47:28,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:47:28,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:47:28,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:47:28,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:47:28,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:47:28,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:47:28,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:47:28,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:47:28,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:47:28,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:47:28,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:47:28,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:47:28,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:47:28,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:47:28,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:47:28,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:47:28,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:47:28,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:47:28,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:47:28,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:47:28,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:47:28,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:47:28,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:47:28,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:47:28,063 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-22 02:47:28,123 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:47:28,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:47:28,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:47:28,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:47:28,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:47:28,126 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:47:28,126 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:47:28,127 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:47:28,127 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:47:28,127 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:47:28,128 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:47:28,129 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:47:28,129 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:47:28,129 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:47:28,130 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:47:28,130 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:47:28,130 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:47:28,130 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:47:28,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:47:28,132 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:47:28,132 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:47:28,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:47:28,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:47:28,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:47:28,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:47:28,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:47:28,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:47:28,135 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-22 02:47:28,135 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:47:28,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:47:28,135 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:47:28,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:47:28,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:47:28,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:47:28,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:47:28,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:47:28,137 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:47:28,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:47:28,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:47:28,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:47:28,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:47:28,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:47:28,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:47:28,139 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_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 [2022-11-22 02:47:28,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:47:28,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:47:28,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:47:28,486 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:47:28,486 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:47:28,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c [2022-11-22 02:47:31,502 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:47:31,741 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:47:31,741 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c [2022-11-22 02:47:31,750 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/data/d278c891f/6fae1ba4f40c4f5898693770b2560c3b/FLAGdcccba3ef [2022-11-22 02:47:31,769 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/data/d278c891f/6fae1ba4f40c4f5898693770b2560c3b [2022-11-22 02:47:31,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:47:31,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:47:31,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:47:31,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:47:31,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:47:31,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:47:31" (1/1) ... [2022-11-22 02:47:31,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5da2ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:31, skipping insertion in model container [2022-11-22 02:47:31,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:47:31" (1/1) ... [2022-11-22 02:47:31,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:47:31,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:47:32,006 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_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2022-11-22 02:47:32,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:47:32,025 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:47:32,066 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_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2022-11-22 02:47:32,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:47:32,087 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:47:32,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32 WrapperNode [2022-11-22 02:47:32,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:47:32,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:47:32,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:47:32,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:47:32,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (1/1) ... [2022-11-22 02:47:32,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (1/1) ... [2022-11-22 02:47:32,146 INFO L138 Inliner]: procedures = 29, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 482 [2022-11-22 02:47:32,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:47:32,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:47:32,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:47:32,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:47:32,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (1/1) ... [2022-11-22 02:47:32,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (1/1) ... [2022-11-22 02:47:32,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (1/1) ... [2022-11-22 02:47:32,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (1/1) ... [2022-11-22 02:47:32,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (1/1) ... [2022-11-22 02:47:32,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (1/1) ... [2022-11-22 02:47:32,184 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (1/1) ... [2022-11-22 02:47:32,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (1/1) ... [2022-11-22 02:47:32,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:47:32,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:47:32,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:47:32,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:47:32,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (1/1) ... [2022-11-22 02:47:32,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:47:32,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:47:32,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:47:32,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:47:32,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:47:32,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:47:32,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:47:32,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:47:32,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 02:47:32,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 02:47:32,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 02:47:32,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 02:47:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-22 02:47:32,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-22 02:47:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-22 02:47:32,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-22 02:47:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:47:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-11-22 02:47:32,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-11-22 02:47:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-11-22 02:47:32,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-11-22 02:47:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 02:47:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 02:47:32,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:47:32,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:47:32,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:47:32,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:47:32,268 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 02:47:32,408 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:47:32,410 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:47:33,388 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:47:34,136 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:47:34,136 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-22 02:47:34,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:47:34 BoogieIcfgContainer [2022-11-22 02:47:34,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:47:34,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:47:34,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:47:34,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:47:34,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:47:31" (1/3) ... [2022-11-22 02:47:34,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f19444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:47:34, skipping insertion in model container [2022-11-22 02:47:34,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:32" (2/3) ... [2022-11-22 02:47:34,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f19444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:47:34, skipping insertion in model container [2022-11-22 02:47:34,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:47:34" (3/3) ... [2022-11-22 02:47:34,161 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2022-11-22 02:47:34,171 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-22 02:47:34,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:47:34,182 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2022-11-22 02:47:34,182 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 02:47:34,599 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-11-22 02:47:34,657 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 02:47:34,682 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 370 places, 374 transitions, 820 flow [2022-11-22 02:47:34,687 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 370 places, 374 transitions, 820 flow [2022-11-22 02:47:34,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 370 places, 374 transitions, 820 flow [2022-11-22 02:47:34,854 INFO L130 PetriNetUnfolder]: 21/316 cut-off events. [2022-11-22 02:47:34,854 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-22 02:47:34,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 316 events. 21/316 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 558 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 263. Up to 3 conditions per place. [2022-11-22 02:47:34,872 INFO L119 LiptonReduction]: Number of co-enabled transitions 16412 [2022-11-22 02:48:17,746 INFO L134 LiptonReduction]: Checked pairs total: 62738 [2022-11-22 02:48:17,746 INFO L136 LiptonReduction]: Total number of compositions: 373 [2022-11-22 02:48:17,754 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 147 places, 137 transitions, 346 flow [2022-11-22 02:48:25,977 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 165303 states, 157731 states have (on average 5.392357875116496) internal successors, (850542), 165302 states have internal predecessors, (850542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:48:26,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:48:26,040 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;@698fc4a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:48:26,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 102 error locations. [2022-11-22 02:48:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 165303 states, 157731 states have (on average 5.392357875116496) internal successors, (850542), 165302 states have internal predecessors, (850542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:48:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-22 02:48:26,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:48:26,386 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-22 02:48:26,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2022-11-22 02:48:26,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:48:26,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2192, now seen corresponding path program 1 times [2022-11-22 02:48:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:48:26,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369082514] [2022-11-22 02:48:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:48:26,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:48:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:48:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:48:26,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:48:26,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369082514] [2022-11-22 02:48:26,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369082514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:48:26,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:48:26,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-22 02:48:26,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61460068] [2022-11-22 02:48:26,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:48:26,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 02:48:26,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:48:26,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 02:48:26,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:48:26,841 INFO L87 Difference]: Start difference. First operand has 165303 states, 157731 states have (on average 5.392357875116496) internal successors, (850542), 165302 states have internal predecessors, (850542), 0 states have call successors, (0), 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) [2022-11-22 02:48:29,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:48:29,126 INFO L93 Difference]: Finished difference Result 79589 states and 403460 transitions. [2022-11-22 02:48:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 02:48:29,129 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 [2022-11-22 02:48:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:48:30,647 INFO L225 Difference]: With dead ends: 79589 [2022-11-22 02:48:30,648 INFO L226 Difference]: Without dead ends: 79589 [2022-11-22 02:48:30,649 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 [2022-11-22 02:48:30,653 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:48:30,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:48:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79589 states. [2022-11-22 02:48:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79589 to 79589. [2022-11-22 02:48:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79589 states, 76779 states have (on average 5.2548222821344375) internal successors, (403460), 79588 states have internal predecessors, (403460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:48:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79589 states to 79589 states and 403460 transitions. [2022-11-22 02:48:35,653 INFO L78 Accepts]: Start accepts. Automaton has 79589 states and 403460 transitions. Word has length 1 [2022-11-22 02:48:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:48:35,654 INFO L495 AbstractCegarLoop]: Abstraction has 79589 states and 403460 transitions. [2022-11-22 02:48:35,654 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) [2022-11-22 02:48:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 79589 states and 403460 transitions. [2022-11-22 02:48:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:48:35,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:48:35,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:48:35,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:48:35,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2022-11-22 02:48:35,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:48:35,657 INFO L85 PathProgramCache]: Analyzing trace with hash 70070, now seen corresponding path program 1 times [2022-11-22 02:48:35,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:48:35,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321540749] [2022-11-22 02:48:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:48:35,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:48:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:48:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:48:35,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:48:35,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321540749] [2022-11-22 02:48:35,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321540749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:48:35,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:48:35,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:48:35,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446158257] [2022-11-22 02:48:35,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:48:35,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:48:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:48:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:48:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:48:35,841 INFO L87 Difference]: Start difference. First operand 79589 states and 403460 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) [2022-11-22 02:48:39,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:48:39,258 INFO L93 Difference]: Finished difference Result 159175 states and 806918 transitions. [2022-11-22 02:48:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:48:39,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 02:48:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:48:41,346 INFO L225 Difference]: With dead ends: 159175 [2022-11-22 02:48:41,346 INFO L226 Difference]: Without dead ends: 159175 [2022-11-22 02:48:41,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:48:41,349 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 90 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:48:41,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 44 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:48:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159175 states. [2022-11-22 02:48:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159175 to 79590. [2022-11-22 02:48:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79590 states, 76780 states have (on average 5.254792914821568) internal successors, (403463), 79589 states have internal predecessors, (403463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:48:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79590 states to 79590 states and 403463 transitions. [2022-11-22 02:48:47,076 INFO L78 Accepts]: Start accepts. Automaton has 79590 states and 403463 transitions. Word has length 2 [2022-11-22 02:48:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:48:47,076 INFO L495 AbstractCegarLoop]: Abstraction has 79590 states and 403463 transitions. [2022-11-22 02:48:47,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:48:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 79590 states and 403463 transitions. [2022-11-22 02:48:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:48:47,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:48:47,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:48:47,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:48:47,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2022-11-22 02:48:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:48:47,087 INFO L85 PathProgramCache]: Analyzing trace with hash 70137, now seen corresponding path program 1 times [2022-11-22 02:48:47,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:48:47,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571458347] [2022-11-22 02:48:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:48:47,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:48:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:48:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:48:47,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:48:47,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571458347] [2022-11-22 02:48:47,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571458347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:48:47,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:48:47,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:48:47,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889638377] [2022-11-22 02:48:47,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:48:47,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:48:47,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:48:47,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:48:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:48:47,369 INFO L87 Difference]: Start difference. First operand 79590 states and 403463 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) [2022-11-22 02:48:49,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:48:49,822 INFO L93 Difference]: Finished difference Result 159175 states and 806917 transitions. [2022-11-22 02:48:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:48:49,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 02:48:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:48:51,674 INFO L225 Difference]: With dead ends: 159175 [2022-11-22 02:48:51,674 INFO L226 Difference]: Without dead ends: 159175 [2022-11-22 02:48:51,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:48:51,676 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:48:51,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 44 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:48:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159175 states. [2022-11-22 02:48:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159175 to 79590. [2022-11-22 02:48:56,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79590 states, 76780 states have (on average 5.2547798905965095) internal successors, (403462), 79589 states have internal predecessors, (403462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:48:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79590 states to 79590 states and 403462 transitions. [2022-11-22 02:48:56,495 INFO L78 Accepts]: Start accepts. Automaton has 79590 states and 403462 transitions. Word has length 2 [2022-11-22 02:48:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:48:56,495 INFO L495 AbstractCegarLoop]: Abstraction has 79590 states and 403462 transitions. [2022-11-22 02:48:56,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:48:56,495 INFO L276 IsEmpty]: Start isEmpty. Operand 79590 states and 403462 transitions. [2022-11-22 02:48:56,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:48:56,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:48:56,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:48:56,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:48:56,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2022-11-22 02:48:56,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:48:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2176334, now seen corresponding path program 1 times [2022-11-22 02:48:56,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:48:56,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421549712] [2022-11-22 02:48:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:48:56,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:48:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:48:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:48:56,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:48:56,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421549712] [2022-11-22 02:48:56,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421549712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:48:56,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372088542] [2022-11-22 02:48:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:48:56,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:48:56,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:48:56,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:48:56,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd879ce5-8f9d-472a-bf79-a2b4f00f8ef4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:48:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:48:56,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:48:56,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:48:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:48:56,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:48:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:48:56,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372088542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:48:56,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175652315] [2022-11-22 02:48:56,995 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 02:48:56,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:48:56,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2022-11-22 02:48:56,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30164121] [2022-11-22 02:48:56,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:48:56,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:48:56,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:48:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:48:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:48:56,999 INFO L87 Difference]: Start difference. First operand 79590 states and 403462 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)