./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 09:13:21,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:13:21,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:13:21,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:13:21,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:13:21,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:13:21,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:13:21,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:13:21,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:13:21,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:13:21,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:13:21,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:13:21,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:13:21,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:13:21,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:13:21,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:13:21,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:13:21,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:13:21,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:13:21,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:13:21,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:13:21,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:13:21,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:13:21,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:13:21,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:13:21,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:13:21,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:13:21,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:13:21,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:13:21,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:13:21,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:13:21,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:13:21,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:13:21,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:13:21,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:13:21,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:13:22,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:13:22,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:13:22,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:13:22,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:13:22,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:13:22,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-12-14 09:13:22,038 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:13:22,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:13:22,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:13:22,039 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:13:22,039 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:13:22,040 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:13:22,040 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:13:22,040 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:13:22,040 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:13:22,040 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:13:22,040 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:13:22,040 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:13:22,041 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:13:22,041 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:13:22,041 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:13:22,041 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:13:22,041 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:13:22,041 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:13:22,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:13:22,042 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:13:22,042 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:13:22,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:13:22,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:13:22,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:13:22,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:13:22,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:13:22,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:13:22,043 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-14 09:13:22,043 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:13:22,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:13:22,044 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:13:22,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:13:22,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:13:22,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:13:22,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:13:22,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:13:22,045 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:13:22,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:13:22,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:13:22,049 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:13:22,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:13:22,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:13:22,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:13:22,050 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_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e [2022-12-14 09:13:22,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:13:22,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:13:22,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:13:22,227 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:13:22,227 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:13:22,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-12-14 09:13:24,810 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:13:24,961 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:13:24,961 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-12-14 09:13:24,966 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/data/e7d84b4ee/c548cc1fe918474282799841786df045/FLAGe13ce52c0 [2022-12-14 09:13:25,369 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/data/e7d84b4ee/c548cc1fe918474282799841786df045 [2022-12-14 09:13:25,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:13:25,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:13:25,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:13:25,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:13:25,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:13:25,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20017882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25, skipping insertion in model container [2022-12-14 09:13:25,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:13:25,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:13:25,552 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_b57ad847-ec6c-4c32-8f97-ceb0a765424b/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-12-14 09:13:25,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:13:25,567 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:13:25,588 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_b57ad847-ec6c-4c32-8f97-ceb0a765424b/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-12-14 09:13:25,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:13:25,604 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:13:25,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25 WrapperNode [2022-12-14 09:13:25,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:13:25,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:13:25,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:13:25,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:13:25,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,643 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 156 [2022-12-14 09:13:25,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:13:25,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:13:25,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:13:25,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:13:25,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,669 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:13:25,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:13:25,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:13:25,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:13:25,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (1/1) ... [2022-12-14 09:13:25,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:13:25,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:13:25,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:13:25,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:13:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:13:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 09:13:25,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 09:13:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 09:13:25,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 09:13:25,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:13:25,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:13:25,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:13:25,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 09:13:25,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:13:25,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:13:25,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:13:25,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:13:25,750 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 09:13:25,821 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:13:25,823 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:13:26,037 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:13:26,046 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:13:26,046 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 09:13:26,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:13:26 BoogieIcfgContainer [2022-12-14 09:13:26,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:13:26,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:13:26,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:13:26,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:13:26,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:13:25" (1/3) ... [2022-12-14 09:13:26,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41079b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:13:26, skipping insertion in model container [2022-12-14 09:13:26,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:25" (2/3) ... [2022-12-14 09:13:26,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41079b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:13:26, skipping insertion in model container [2022-12-14 09:13:26,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:13:26" (3/3) ... [2022-12-14 09:13:26,056 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2022-12-14 09:13:26,064 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 09:13:26,074 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:13:26,074 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 09:13:26,074 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 09:13:26,143 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 09:13:26,169 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 09:13:26,183 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 202 transitions, 420 flow [2022-12-14 09:13:26,186 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 202 transitions, 420 flow [2022-12-14 09:13:26,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 202 transitions, 420 flow [2022-12-14 09:13:26,250 INFO L130 PetriNetUnfolder]: 16/200 cut-off events. [2022-12-14 09:13:26,250 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 09:13:26,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 200 events. 16/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 176 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 114. Up to 2 conditions per place. [2022-12-14 09:13:26,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 3584 [2022-12-14 09:13:30,654 INFO L134 LiptonReduction]: Checked pairs total: 3533 [2022-12-14 09:13:30,655 INFO L136 LiptonReduction]: Total number of compositions: 240 [2022-12-14 09:13:30,662 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2022-12-14 09:13:30,672 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 11 states, 8 states have (on average 1.875) internal successors, (15), 10 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) [2022-12-14 09:13:30,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:13:30,696 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;@3109692a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:13:30,696 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-14 09:13:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 8 states have (on average 1.875) internal successors, (15), 10 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) [2022-12-14 09:13:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 09:13:30,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:30,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 09:13:30,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 09:13:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash 26369, now seen corresponding path program 1 times [2022-12-14 09:13:30,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:30,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997512954] [2022-12-14 09:13:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:30,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:30,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997512954] [2022-12-14 09:13:30,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997512954] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:30,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:30,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:13:30,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933386777] [2022-12-14 09:13:30,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:30,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:30,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:30,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:30,936 INFO L87 Difference]: Start difference. First operand has 11 states, 8 states have (on average 1.875) internal successors, (15), 10 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:30,967 INFO L93 Difference]: Finished difference Result 19 states and 28 transitions. [2022-12-14 09:13:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:30,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 09:13:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:30,974 INFO L225 Difference]: With dead ends: 19 [2022-12-14 09:13:30,974 INFO L226 Difference]: Without dead ends: 5 [2022-12-14 09:13:30,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:30,977 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 7 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:30,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 2 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:13:30,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2022-12-14 09:13:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2022-12-14 09:13:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2022-12-14 09:13:30,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2022-12-14 09:13:30,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 6 transitions. Word has length 2 [2022-12-14 09:13:30,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:30,998 INFO L495 AbstractCegarLoop]: Abstraction has 5 states and 6 transitions. [2022-12-14 09:13:30,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:30,998 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 6 transitions. [2022-12-14 09:13:30,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 09:13:30,998 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:30,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 09:13:30,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:13:30,998 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 09:13:30,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:30,999 INFO L85 PathProgramCache]: Analyzing trace with hash 26370, now seen corresponding path program 1 times [2022-12-14 09:13:30,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:30,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320550263] [2022-12-14 09:13:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:30,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:31,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:31,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320550263] [2022-12-14 09:13:31,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320550263] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:31,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:31,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:13:31,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893087956] [2022-12-14 09:13:31,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:31,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:31,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:31,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:31,046 INFO L87 Difference]: Start difference. First operand 5 states and 6 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) [2022-12-14 09:13:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:31,052 INFO L93 Difference]: Finished difference Result 4 states and 4 transitions. [2022-12-14 09:13:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:31,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 09:13:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:31,053 INFO L225 Difference]: With dead ends: 4 [2022-12-14 09:13:31,053 INFO L226 Difference]: Without dead ends: 4 [2022-12-14 09:13:31,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:31,054 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:31,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:13:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2022-12-14 09:13:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2022-12-14 09:13:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2022-12-14 09:13:31,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2022-12-14 09:13:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:31,057 INFO L495 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2022-12-14 09:13:31,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2022-12-14 09:13:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:13:31,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:31,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:13:31,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:13:31,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 09:13:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash 818822, now seen corresponding path program 1 times [2022-12-14 09:13:31,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:31,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098751108] [2022-12-14 09:13:31,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:31,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:31,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:31,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098751108] [2022-12-14 09:13:31,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098751108] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:13:31,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434993594] [2022-12-14 09:13:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:31,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:13:31,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:13:31,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:13:31,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:13:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:31,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:13:31,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:13:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:31,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:13:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:31,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434993594] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:13:31,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1847398970] [2022-12-14 09:13:31,214 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:13:31,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:13:31,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2022-12-14 09:13:31,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972701029] [2022-12-14 09:13:31,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:13:31,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:13:31,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:31,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:13:31,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:13:31,218 INFO L87 Difference]: Start difference. First operand 4 states and 4 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) [2022-12-14 09:13:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:31,231 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2022-12-14 09:13:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:13:31,231 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 [2022-12-14 09:13:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:31,232 INFO L225 Difference]: With dead ends: 7 [2022-12-14 09:13:31,232 INFO L226 Difference]: Without dead ends: 7 [2022-12-14 09:13:31,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:13:31,233 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:31,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:13:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-12-14 09:13:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-12-14 09:13:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2022-12-14 09:13:31,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 3 [2022-12-14 09:13:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:31,234 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2022-12-14 09:13:31,235 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) [2022-12-14 09:13:31,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2022-12-14 09:13:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:13:31,235 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:31,235 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 09:13:31,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:13:31,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:13:31,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 09:13:31,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:31,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1374904255, now seen corresponding path program 2 times [2022-12-14 09:13:31,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:31,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792114868] [2022-12-14 09:13:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:31,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:31,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:31,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792114868] [2022-12-14 09:13:31,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792114868] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:13:31,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339980642] [2022-12-14 09:13:31,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:13:31,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:13:31,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:13:31,635 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:13:31,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:13:31,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 09:13:31,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:13:31,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:13:31,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:13:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:13:31,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:13:31,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339980642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:31,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:13:31,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-14 09:13:31,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403887892] [2022-12-14 09:13:31,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:31,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:31,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:13:31,704 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:31,709 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2022-12-14 09:13:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:31,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:13:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:31,709 INFO L225 Difference]: With dead ends: 6 [2022-12-14 09:13:31,710 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 09:13:31,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:13:31,711 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:31,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:13:31,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 09:13:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 09:13:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 09:13:31,712 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2022-12-14 09:13:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:31,712 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 09:13:31,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:31,713 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 09:13:31,713 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 09:13:31,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 4 remaining) [2022-12-14 09:13:31,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 4 remaining) [2022-12-14 09:13:31,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-14 09:13:31,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-14 09:13:31,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:13:31,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:13:31,923 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-12-14 09:13:31,929 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-14 09:13:31,930 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 09:13:31,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 09:13:31 BasicIcfg [2022-12-14 09:13:31,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 09:13:31,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 09:13:31,938 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 09:13:31,938 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 09:13:31,939 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:13:26" (3/4) ... [2022-12-14 09:13:31,946 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 09:13:31,963 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-12-14 09:13:31,964 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-12-14 09:13:31,974 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2022-12-14 09:13:31,974 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-12-14 09:13:31,975 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-14 09:13:31,975 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 09:13:32,045 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 09:13:32,045 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 09:13:32,046 INFO L158 Benchmark]: Toolchain (without parser) took 6672.66ms. Allocated memory is still 167.8MB. Free memory was 112.1MB in the beginning and 57.5MB in the end (delta: 54.5MB). Peak memory consumption was 56.3MB. Max. memory is 16.1GB. [2022-12-14 09:13:32,046 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 104.9MB. Free memory is still 75.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:13:32,046 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.81ms. Allocated memory is still 167.8MB. Free memory was 111.8MB in the beginning and 100.5MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 09:13:32,047 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.34ms. Allocated memory is still 167.8MB. Free memory was 100.5MB in the beginning and 98.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:13:32,047 INFO L158 Benchmark]: Boogie Preprocessor took 37.58ms. Allocated memory is still 167.8MB. Free memory was 98.5MB in the beginning and 141.2MB in the end (delta: -42.8MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2022-12-14 09:13:32,047 INFO L158 Benchmark]: RCFGBuilder took 365.85ms. Allocated memory is still 167.8MB. Free memory was 141.2MB in the beginning and 124.0MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 09:13:32,048 INFO L158 Benchmark]: TraceAbstraction took 5886.53ms. Allocated memory is still 167.8MB. Free memory was 123.4MB in the beginning and 60.7MB in the end (delta: 62.7MB). Peak memory consumption was 65.5MB. Max. memory is 16.1GB. [2022-12-14 09:13:32,048 INFO L158 Benchmark]: Witness Printer took 107.94ms. Allocated memory is still 167.8MB. Free memory was 60.7MB in the beginning and 57.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:13:32,049 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 104.9MB. Free memory is still 75.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 230.81ms. Allocated memory is still 167.8MB. Free memory was 111.8MB in the beginning and 100.5MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.34ms. Allocated memory is still 167.8MB. Free memory was 100.5MB in the beginning and 98.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.58ms. Allocated memory is still 167.8MB. Free memory was 98.5MB in the beginning and 141.2MB in the end (delta: -42.8MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * RCFGBuilder took 365.85ms. Allocated memory is still 167.8MB. Free memory was 141.2MB in the beginning and 124.0MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 5886.53ms. Allocated memory is still 167.8MB. Free memory was 123.4MB in the beginning and 60.7MB in the end (delta: 62.7MB). Peak memory consumption was 65.5MB. Max. memory is 16.1GB. * Witness Printer took 107.94ms. Allocated memory is still 167.8MB. Free memory was 60.7MB in the beginning and 57.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.5s, 193 PlacesBefore, 25 PlacesAfterwards, 202 TransitionsBefore, 21 TransitionsAfterwards, 3584 CoEnabledTransitionPairs, 8 FixpointIterations, 99 TrivialSequentialCompositions, 73 ConcurrentSequentialCompositions, 23 TrivialYvCompositions, 32 ConcurrentYvCompositions, 13 ChoiceCompositions, 240 TotalNumberOfCompositions, 3533 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3465, independent: 3447, independent conditional: 0, independent unconditional: 3447, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2707, independent: 2700, independent conditional: 0, independent unconditional: 2700, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2707, independent: 2700, independent conditional: 0, independent unconditional: 2700, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 14, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3465, independent: 747, independent conditional: 0, independent unconditional: 747, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 2707, unknown conditional: 0, unknown unconditional: 2707] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - 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 - PositiveResult [Line: 104]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 104]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 264 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 5.8s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 29 IncrementalHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 29 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 22 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 54 SizeOfPredicates, 2 NumberOfNonLiveVariables, 187 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 10/23 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-14 09:13:32,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57ad847-ec6c-4c32-8f97-ceb0a765424b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE