./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/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_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 290432887833d1264fa39f327d8609faf39248fe680017022e16e5c72d0bf2b6 --- 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 14:13:17,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:13:17,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:13:17,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:13:17,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:13:17,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:13:17,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:13:17,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:13:17,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:13:17,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:13:17,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:13:17,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:13:17,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:13:17,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:13:17,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:13:17,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:13:17,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:13:17,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:13:17,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:13:17,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:13:17,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:13:17,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:13:17,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:13:17,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:13:17,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:13:17,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:13:17,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:13:17,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:13:17,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:13:17,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:13:17,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:13:17,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:13:17,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:13:17,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:13:17,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:13:17,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:13:17,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:13:17,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:13:17,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:13:17,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:13:17,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:13:17,829 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:13:17,843 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:13:17,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:13:17,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:13:17,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:13:17,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:13:17,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:13:17,844 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:13:17,844 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:13:17,844 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:13:17,845 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:13:17,845 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:13:17,845 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:13:17,845 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:13:17,845 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:13:17,845 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:13:17,845 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:13:17,845 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:13:17,846 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:13:17,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:13:17,846 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:13:17,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:13:17,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:13:17,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:13:17,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:13:17,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:13:17,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:13:17,847 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:13:17,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:13:17,847 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:13:17,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:13:17,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:13:17,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:13:17,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:13:17,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:13:17,848 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:13:17,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:13:17,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:13:17,848 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:13:17,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:13:17,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:13:17,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:13:17,849 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_2f534bfc-0218-469e-a60b-63ba565761e2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 290432887833d1264fa39f327d8609faf39248fe680017022e16e5c72d0bf2b6 [2022-12-14 14:13:18,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:13:18,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:13:18,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:13:18,035 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:13:18,036 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:13:18,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c [2022-12-14 14:13:20,535 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:13:20,700 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:13:20,701 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c [2022-12-14 14:13:20,706 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/data/7e3028f40/0be1350cbae14fe19017af7527b3030c/FLAG0c894d5e4 [2022-12-14 14:13:21,107 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/data/7e3028f40/0be1350cbae14fe19017af7527b3030c [2022-12-14 14:13:21,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:13:21,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:13:21,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:13:21,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:13:21,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:13:21,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3679e6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21, skipping insertion in model container [2022-12-14 14:13:21,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:13:21,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:13:21,247 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_2f534bfc-0218-469e-a60b-63ba565761e2/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c[712,725] [2022-12-14 14:13:21,261 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:13:21,270 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:13:21,281 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_2f534bfc-0218-469e-a60b-63ba565761e2/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c[712,725] [2022-12-14 14:13:21,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:13:21,296 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:13:21,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21 WrapperNode [2022-12-14 14:13:21,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:13:21,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:13:21,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:13:21,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:13:21,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,309 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,321 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2022-12-14 14:13:21,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:13:21,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:13:21,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:13:21,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:13:21,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:13:21,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:13:21,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:13:21,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:13:21,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (1/1) ... [2022-12-14 14:13:21,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:13:21,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:13:21,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:13:21,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:13:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:13:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:13:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:13:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:13:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 14:13:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 14:13:21,462 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:13:21,464 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:13:21,546 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:13:21,562 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:13:21,562 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 14:13:21,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:13:21 BoogieIcfgContainer [2022-12-14 14:13:21,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:13:21,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:13:21,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:13:21,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:13:21,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:13:21" (1/3) ... [2022-12-14 14:13:21,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb99e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:13:21, skipping insertion in model container [2022-12-14 14:13:21,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:21" (2/3) ... [2022-12-14 14:13:21,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb99e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:13:21, skipping insertion in model container [2022-12-14 14:13:21,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:13:21" (3/3) ... [2022-12-14 14:13:21,573 INFO L112 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound20.c [2022-12-14 14:13:21,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:13:21,592 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:13:21,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:13:21,633 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;@6ac03d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:13:21,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:13:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 14:13:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 14:13:21,642 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:13:21,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 14:13:21,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:13:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:13:21,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2138246143, now seen corresponding path program 1 times [2022-12-14 14:13:21,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:13:21,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2334029] [2022-12-14 14:13:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:13:21,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:13:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:13:21,760 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 14:13:21,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:13:21,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2334029] [2022-12-14 14:13:21,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2334029] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:13:21,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:13:21,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:13:21,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091331444] [2022-12-14 14:13:21,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:13:21,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 14:13:21,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:13:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 14:13:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:13:21,790 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:13:21,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:13:21,810 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-12-14 14:13:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 14:13:21,812 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 14:13:21,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:13:21,817 INFO L225 Difference]: With dead ends: 27 [2022-12-14 14:13:21,817 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 14:13:21,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:13:21,822 INFO L413 NwaCegarLoop]: 14 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, 14 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 14:13:21,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:13:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 14:13:21,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 14:13:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:13:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-12-14 14:13:21,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-12-14 14:13:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:13:21,849 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-12-14 14:13:21,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:13:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-12-14 14:13:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:13:21,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:13:21,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:13:21,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:13:21,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:13:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:13:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1461620770, now seen corresponding path program 1 times [2022-12-14 14:13:21,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:13:21,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635510264] [2022-12-14 14:13:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:13:21,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:13:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:13:21,926 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 14:13:21,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:13:21,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635510264] [2022-12-14 14:13:21,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635510264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:13:21,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:13:21,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:13:21,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325126574] [2022-12-14 14:13:21,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:13:21,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:13:21,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:13:21,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:13:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:13:21,930 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:13:21,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:13:21,945 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-12-14 14:13:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:13:21,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 14:13:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:13:21,947 INFO L225 Difference]: With dead ends: 21 [2022-12-14 14:13:21,947 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 14:13:21,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:13:21,949 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:13:21,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:13:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 14:13:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 14:13:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:13:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-14 14:13:21,953 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2022-12-14 14:13:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:13:21,954 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-14 14:13:21,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:13:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-14 14:13:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:13:21,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:13:21,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:13:21,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:13:21,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:13:21,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:13:21,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1463408230, now seen corresponding path program 1 times [2022-12-14 14:13:21,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:13:21,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106183339] [2022-12-14 14:13:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:13:21,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:13:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 14:13:21,966 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 14:13:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 14:13:21,985 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 14:13:21,985 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 14:13:21,986 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 14:13:21,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:13:21,990 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 14:13:21,993 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 14:13:22,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 02:13:22 BoogieIcfgContainer [2022-12-14 14:13:22,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 14:13:22,006 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 14:13:22,006 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 14:13:22,007 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 14:13:22,007 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:13:21" (3/4) ... [2022-12-14 14:13:22,009 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 14:13:22,009 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 14:13:22,010 INFO L158 Benchmark]: Toolchain (without parser) took 899.30ms. Allocated memory was 119.5MB in the beginning and 151.0MB in the end (delta: 31.5MB). Free memory was 85.8MB in the beginning and 104.6MB in the end (delta: -18.8MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2022-12-14 14:13:22,010 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 119.5MB. Free memory is still 61.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:13:22,011 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.20ms. Allocated memory is still 119.5MB. Free memory was 85.8MB in the beginning and 75.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 14:13:22,011 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.12ms. Allocated memory is still 119.5MB. Free memory was 75.4MB in the beginning and 74.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:13:22,012 INFO L158 Benchmark]: Boogie Preprocessor took 16.76ms. Allocated memory is still 119.5MB. Free memory was 74.1MB in the beginning and 72.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 14:13:22,012 INFO L158 Benchmark]: RCFGBuilder took 225.40ms. Allocated memory is still 119.5MB. Free memory was 72.8MB in the beginning and 63.2MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 14:13:22,012 INFO L158 Benchmark]: TraceAbstraction took 438.77ms. Allocated memory was 119.5MB in the beginning and 151.0MB in the end (delta: 31.5MB). Free memory was 62.4MB in the beginning and 104.6MB in the end (delta: -42.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:13:22,013 INFO L158 Benchmark]: Witness Printer took 3.17ms. Allocated memory is still 151.0MB. Free memory is still 104.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:13:22,014 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 119.5MB. Free memory is still 61.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.20ms. Allocated memory is still 119.5MB. Free memory was 85.8MB in the beginning and 75.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.12ms. Allocated memory is still 119.5MB. Free memory was 75.4MB in the beginning and 74.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 16.76ms. Allocated memory is still 119.5MB. Free memory was 74.1MB in the beginning and 72.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 225.40ms. Allocated memory is still 119.5MB. Free memory was 72.8MB in the beginning and 63.2MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 438.77ms. Allocated memory was 119.5MB in the beginning and 151.0MB in the end (delta: 31.5MB). Free memory was 62.4MB in the beginning and 104.6MB in the end (delta: -42.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.17ms. Allocated memory is still 151.0MB. Free memory is still 104.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0, r=0] [L32] EXPR counter++ VAL [counter=1, counter++=0, r=0] [L32] COND TRUE counter++<20 [L33] CALL __VERIFIER_assert((int)(r*r - a - r + 2*x) == 0) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 21 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 25 mSDtfsCounter, 11 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, InterpolantAutomatonStates: 6, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 14:13:22,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/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_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 290432887833d1264fa39f327d8609faf39248fe680017022e16e5c72d0bf2b6 --- 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 14:13:23,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:13:23,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:13:23,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:13:23,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:13:23,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:13:23,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:13:23,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:13:23,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:13:23,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:13:23,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:13:23,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:13:23,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:13:23,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:13:23,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:13:23,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:13:23,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:13:23,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:13:23,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:13:23,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:13:23,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:13:23,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:13:23,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:13:23,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:13:23,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:13:23,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:13:23,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:13:23,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:13:23,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:13:23,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:13:23,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:13:23,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:13:23,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:13:23,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:13:23,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:13:23,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:13:23,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:13:23,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:13:23,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:13:23,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:13:23,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:13:23,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 14:13:23,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:13:23,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:13:23,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:13:23,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:13:23,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:13:23,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:13:23,710 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:13:23,711 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:13:23,711 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:13:23,711 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:13:23,711 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:13:23,711 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:13:23,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:13:23,712 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:13:23,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:13:23,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:13:23,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:13:23,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:13:23,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:13:23,712 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 14:13:23,712 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 14:13:23,713 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 14:13:23,713 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:13:23,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:13:23,713 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:13:23,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:13:23,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:13:23,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 14:13:23,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:13:23,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:13:23,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:13:23,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:13:23,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:13:23,714 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 14:13:23,714 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 14:13:23,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:13:23,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:13:23,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 14:13:23,715 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_2f534bfc-0218-469e-a60b-63ba565761e2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 290432887833d1264fa39f327d8609faf39248fe680017022e16e5c72d0bf2b6 [2022-12-14 14:13:23,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:13:23,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:13:23,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:13:23,964 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:13:23,964 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:13:23,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c [2022-12-14 14:13:26,540 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:13:26,718 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:13:26,718 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c [2022-12-14 14:13:26,725 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/data/44d3d9091/3768fe98526a44e8b646b4a4d28c5ce3/FLAGfd75af88c [2022-12-14 14:13:26,740 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/data/44d3d9091/3768fe98526a44e8b646b4a4d28c5ce3 [2022-12-14 14:13:26,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:13:26,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:13:26,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:13:26,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:13:26,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:13:26,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f568e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26, skipping insertion in model container [2022-12-14 14:13:26,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:13:26,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:13:26,870 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_2f534bfc-0218-469e-a60b-63ba565761e2/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c[712,725] [2022-12-14 14:13:26,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:13:26,891 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:13:26,901 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_2f534bfc-0218-469e-a60b-63ba565761e2/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound20.c[712,725] [2022-12-14 14:13:26,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:13:26,915 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:13:26,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26 WrapperNode [2022-12-14 14:13:26,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:13:26,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:13:26,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:13:26,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:13:26,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,939 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 35 [2022-12-14 14:13:26,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:13:26,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:13:26,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:13:26,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:13:26,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,958 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:13:26,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:13:26,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:13:26,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:13:26,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (1/1) ... [2022-12-14 14:13:26,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:13:26,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:13:26,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:13:26,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:13:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:13:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 14:13:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:13:27,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:13:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 14:13:27,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 14:13:27,080 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:13:27,082 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:13:27,987 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:13:27,998 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:13:27,998 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 14:13:28,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:13:27 BoogieIcfgContainer [2022-12-14 14:13:28,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:13:28,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:13:28,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:13:28,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:13:28,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:13:26" (1/3) ... [2022-12-14 14:13:28,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43823c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:13:28, skipping insertion in model container [2022-12-14 14:13:28,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:13:26" (2/3) ... [2022-12-14 14:13:28,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43823c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:13:28, skipping insertion in model container [2022-12-14 14:13:28,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:13:27" (3/3) ... [2022-12-14 14:13:28,007 INFO L112 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound20.c [2022-12-14 14:13:28,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:13:28,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:13:28,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:13:28,061 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;@77f29b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:13:28,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:13:28,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 14:13:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:13:28,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:13:28,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:13:28,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:13:28,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:13:28,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1819757606, now seen corresponding path program 1 times [2022-12-14 14:13:28,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:13:28,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949015408] [2022-12-14 14:13:28,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:13:28,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 14:13:28,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:13:28,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 14:13:28,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 14:13:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:13:28,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 14:13:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:13:28,483 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 14:13:28,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:13:28,484 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:13:28,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949015408] [2022-12-14 14:13:28,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949015408] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:13:28,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:13:28,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:13:28,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199217035] [2022-12-14 14:13:28,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:13:28,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 14:13:28,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:13:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 14:13:28,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:13:28,511 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:13:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:13:28,525 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-12-14 14:13:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 14:13:28,526 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 14:13:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:13:28,531 INFO L225 Difference]: With dead ends: 32 [2022-12-14 14:13:28,531 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 14:13:28,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:13:28,536 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:13:28,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:13:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 14:13:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 14:13:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:13:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-12-14 14:13:28,560 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-12-14 14:13:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:13:28,560 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-12-14 14:13:28,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:13:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-12-14 14:13:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 14:13:28,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:13:28,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:13:28,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:13:28,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 14:13:28,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:13:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:13:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash 178410715, now seen corresponding path program 1 times [2022-12-14 14:13:28,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:13:28,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16428371] [2022-12-14 14:13:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:13:28,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 14:13:28,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:13:28,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 14:13:28,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 14:13:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:13:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:13:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:13:29,209 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 14:13:29,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:13:29,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:13:29,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16428371] [2022-12-14 14:13:29,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16428371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:13:29,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:13:29,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:13:29,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968924631] [2022-12-14 14:13:29,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:13:29,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:13:29,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:13:29,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:13:29,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:13:29,212 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:13:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:13:30,198 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-12-14 14:13:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:13:30,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 14:13:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:13:30,199 INFO L225 Difference]: With dead ends: 22 [2022-12-14 14:13:30,200 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 14:13:30,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:13:30,201 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:13:30,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 14:13:30,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 14:13:30,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 14:13:30,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:13:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-12-14 14:13:30,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-12-14 14:13:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:13:30,205 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-12-14 14:13:30,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:13:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-12-14 14:13:30,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 14:13:30,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:13:30,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:13:30,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 14:13:30,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 14:13:30,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:13:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:13:30,410 INFO L85 PathProgramCache]: Analyzing trace with hash 180198175, now seen corresponding path program 1 times [2022-12-14 14:13:30,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:13:30,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846050027] [2022-12-14 14:13:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:13:30,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 14:13:30,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:13:30,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 14:13:30,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 14:13:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 14:13:30,794 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 14:13:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 14:13:31,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2022-12-14 14:13:31,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [930846842] [2022-12-14 14:13:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:13:31,113 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:13:31,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:13:31,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:13:31,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f534bfc-0218-469e-a60b-63ba565761e2/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 14:13:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 14:13:31,705 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 14:13:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat