./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/freire1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/freire1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur --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 a69393ce5fe75f7ab01b3582ad0675909e9396d47152d54bb12cb1909ec8c6ec --- 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-38b53e6 [2022-11-26 00:18:19,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:18:19,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:18:19,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:18:19,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:18:19,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:18:19,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:18:19,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:18:19,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:18:19,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:18:19,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:18:19,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:18:19,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:18:19,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:18:19,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:18:19,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:18:19,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:18:19,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:18:19,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:18:19,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:18:19,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:18:19,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:18:19,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:18:19,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:18:19,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:18:19,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:18:19,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:18:19,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:18:19,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:18:19,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:18:19,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:18:19,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:18:19,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:18:19,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:18:19,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:18:19,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:18:19,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:18:19,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:18:19,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:18:19,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:18:19,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:18:19,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:18:19,942 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:18:19,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:18:19,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:18:19,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:18:19,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:18:19,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:18:19,944 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:18:19,944 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:18:19,945 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:18:19,945 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:18:19,946 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:18:19,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:18:19,946 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:18:19,946 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:18:19,947 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:18:19,947 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:18:19,947 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:18:19,947 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:18:19,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:18:19,948 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:18:19,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:18:19,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:18:19,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:18:19,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:18:19,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:18:19,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:18:19,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:18:19,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:18:19,950 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:18:19,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:18:19,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:18:19,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:18:19,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:19,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:18:19,951 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:18:19,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:18:19,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:18:19,952 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:18:19,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:18:19,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:18:19,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:18:19,953 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_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a69393ce5fe75f7ab01b3582ad0675909e9396d47152d54bb12cb1909ec8c6ec [2022-11-26 00:18:20,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:18:20,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:18:20,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:18:20,304 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:18:20,305 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:18:20,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench/freire1.c [2022-11-26 00:18:23,439 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:18:23,759 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:18:23,760 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/sv-benchmarks/c/nla-digbench/freire1.c [2022-11-26 00:18:23,767 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/data/6dfb2c178/444d9ee2181e46bf9e2f16daf462040d/FLAG06d62ac9f [2022-11-26 00:18:23,796 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/data/6dfb2c178/444d9ee2181e46bf9e2f16daf462040d [2022-11-26 00:18:23,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:18:23,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:18:23,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:23,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:18:23,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:18:23,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:23" (1/1) ... [2022-11-26 00:18:23,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61deca52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:23, skipping insertion in model container [2022-11-26 00:18:23,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:23" (1/1) ... [2022-11-26 00:18:23,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:18:23,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:18:24,045 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_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2022-11-26 00:18:24,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:24,086 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:18:24,102 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_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2022-11-26 00:18:24,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:24,124 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:18:24,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24 WrapperNode [2022-11-26 00:18:24,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:24,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:24,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:18:24,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:18:24,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (1/1) ... [2022-11-26 00:18:24,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (1/1) ... [2022-11-26 00:18:24,159 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2022-11-26 00:18:24,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:24,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:18:24,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:18:24,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:18:24,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (1/1) ... [2022-11-26 00:18:24,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (1/1) ... [2022-11-26 00:18:24,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (1/1) ... [2022-11-26 00:18:24,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (1/1) ... [2022-11-26 00:18:24,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (1/1) ... [2022-11-26 00:18:24,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (1/1) ... [2022-11-26 00:18:24,199 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (1/1) ... [2022-11-26 00:18:24,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (1/1) ... [2022-11-26 00:18:24,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:18:24,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:18:24,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:18:24,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:18:24,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (1/1) ... [2022-11-26 00:18:24,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:24,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:24,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:18:24,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:18:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:18:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:18:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:18:24,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:18:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:18:24,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:18:24,408 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:18:24,411 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:18:24,579 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:18:24,619 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:18:24,634 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:18:24,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:24 BoogieIcfgContainer [2022-11-26 00:18:24,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:18:24,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:18:24,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:18:24,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:18:24,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:18:23" (1/3) ... [2022-11-26 00:18:24,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e2f3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:24, skipping insertion in model container [2022-11-26 00:18:24,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:24" (2/3) ... [2022-11-26 00:18:24,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e2f3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:24, skipping insertion in model container [2022-11-26 00:18:24,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:24" (3/3) ... [2022-11-26 00:18:24,648 INFO L112 eAbstractionObserver]: Analyzing ICFG freire1.c [2022-11-26 00:18:24,684 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:18:24,684 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:18:24,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:18:24,789 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;@4fd5124d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:18:24,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:18:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 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) [2022-11-26 00:18:24,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:18:24,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:24,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:18:24,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:24,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:24,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2101214937, now seen corresponding path program 1 times [2022-11-26 00:18:24,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:24,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999351530] [2022-11-26 00:18:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:24,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:18:24,925 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:18:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:18:24,957 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:18:24,960 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:18:24,961 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:18:24,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:18:24,969 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-11-26 00:18:24,974 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:18:24,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:18:24 BoogieIcfgContainer [2022-11-26 00:18:24,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:18:24,995 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:18:24,995 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:18:24,996 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:18:24,996 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:24" (3/4) ... [2022-11-26 00:18:25,001 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-26 00:18:25,001 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:18:25,002 INFO L158 Benchmark]: Toolchain (without parser) took 1196.83ms. Allocated memory is still 159.4MB. Free memory was 129.8MB in the beginning and 92.6MB in the end (delta: 37.2MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-26 00:18:25,003 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:18:25,004 INFO L158 Benchmark]: CACSL2BoogieTranslator took 313.36ms. Allocated memory is still 159.4MB. Free memory was 129.8MB in the beginning and 119.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:18:25,005 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.29ms. Allocated memory is still 159.4MB. Free memory was 119.9MB in the beginning and 118.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:18:25,005 INFO L158 Benchmark]: Boogie Preprocessor took 41.19ms. Allocated memory is still 159.4MB. Free memory was 118.5MB in the beginning and 117.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:18:25,006 INFO L158 Benchmark]: RCFGBuilder took 435.75ms. Allocated memory is still 159.4MB. Free memory was 117.1MB in the beginning and 107.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:18:25,007 INFO L158 Benchmark]: TraceAbstraction took 353.98ms. Allocated memory is still 159.4MB. Free memory was 106.6MB in the beginning and 92.6MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-26 00:18:25,007 INFO L158 Benchmark]: Witness Printer took 5.92ms. Allocated memory is still 159.4MB. Free memory is still 92.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:18:25,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 313.36ms. Allocated memory is still 159.4MB. Free memory was 129.8MB in the beginning and 119.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.29ms. Allocated memory is still 159.4MB. Free memory was 119.9MB in the beginning and 118.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.19ms. Allocated memory is still 159.4MB. Free memory was 118.5MB in the beginning and 117.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 435.75ms. Allocated memory is still 159.4MB. Free memory was 117.1MB in the beginning and 107.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 353.98ms. Allocated memory is still 159.4MB. Free memory was 106.6MB in the beginning and 92.6MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 5.92ms. Allocated memory is still 159.4MB. Free memory is still 92.6MB. 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 32, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x; [L27] a = __VERIFIER_nondet_double() [L28] x = a / 2.0 [L29] r = 0 VAL [r=0] [L31] COND TRUE 1 VAL [r=0] [L32] CALL __VERIFIER_assert((int)(r*r - a - r + 2*x) == 0) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 [2022-11-26 00:18:25,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/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_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/freire1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur --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 a69393ce5fe75f7ab01b3582ad0675909e9396d47152d54bb12cb1909ec8c6ec --- 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-38b53e6 [2022-11-26 00:18:27,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:18:27,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:18:27,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:18:27,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:18:27,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:18:27,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:18:27,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:18:27,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:18:27,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:18:27,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:18:27,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:18:27,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:18:27,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:18:27,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:18:27,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:18:27,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:18:27,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:18:27,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:18:27,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:18:27,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:18:27,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:18:27,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:18:27,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:18:27,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:18:27,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:18:27,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:18:27,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:18:27,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:18:27,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:18:27,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:18:27,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:18:27,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:18:27,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:18:27,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:18:27,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:18:27,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:18:27,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:18:27,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:18:27,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:18:27,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:18:27,840 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-26 00:18:27,881 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:18:27,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:18:27,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:18:27,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:18:27,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:18:27,883 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:18:27,884 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:18:27,884 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:18:27,885 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:18:27,885 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:18:27,885 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:18:27,885 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:18:27,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:18:27,887 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:18:27,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:18:27,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:18:27,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:18:27,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:18:27,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:18:27,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:18:27,889 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 00:18:27,889 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 00:18:27,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:18:27,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:18:27,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:18:27,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:18:27,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:18:27,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 00:18:27,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:18:27,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:27,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:18:27,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:18:27,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:18:27,893 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 00:18:27,894 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 00:18:27,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:18:27,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:18:27,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 00:18:27,895 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_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a69393ce5fe75f7ab01b3582ad0675909e9396d47152d54bb12cb1909ec8c6ec [2022-11-26 00:18:28,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:18:28,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:18:28,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:18:28,393 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:18:28,395 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:18:28,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench/freire1.c [2022-11-26 00:18:31,674 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:18:31,929 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:18:31,929 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/sv-benchmarks/c/nla-digbench/freire1.c [2022-11-26 00:18:31,942 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/data/eecbdbdcb/7e5310e2fb134afda2b845dbe4f18ab9/FLAG4608d3558 [2022-11-26 00:18:31,969 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/data/eecbdbdcb/7e5310e2fb134afda2b845dbe4f18ab9 [2022-11-26 00:18:31,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:18:31,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:18:31,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:31,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:18:31,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:18:31,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:31" (1/1) ... [2022-11-26 00:18:31,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79896f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:31, skipping insertion in model container [2022-11-26 00:18:31,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:31" (1/1) ... [2022-11-26 00:18:31,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:18:32,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:18:32,235 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_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2022-11-26 00:18:32,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:32,277 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:18:32,296 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_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2022-11-26 00:18:32,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:32,329 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:18:32,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32 WrapperNode [2022-11-26 00:18:32,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:32,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:32,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:18:32,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:18:32,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (1/1) ... [2022-11-26 00:18:32,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (1/1) ... [2022-11-26 00:18:32,381 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2022-11-26 00:18:32,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:32,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:18:32,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:18:32,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:18:32,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (1/1) ... [2022-11-26 00:18:32,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (1/1) ... [2022-11-26 00:18:32,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (1/1) ... [2022-11-26 00:18:32,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (1/1) ... [2022-11-26 00:18:32,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (1/1) ... [2022-11-26 00:18:32,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (1/1) ... [2022-11-26 00:18:32,426 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (1/1) ... [2022-11-26 00:18:32,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (1/1) ... [2022-11-26 00:18:32,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:18:32,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:18:32,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:18:32,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:18:32,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (1/1) ... [2022-11-26 00:18:32,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:32,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:32,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:18:32,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:18:32,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:18:32,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 00:18:32,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:18:32,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:18:32,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:18:32,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:18:32,622 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:18:32,625 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:18:34,199 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:18:34,206 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:18:34,206 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:18:34,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:34 BoogieIcfgContainer [2022-11-26 00:18:34,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:18:34,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:18:34,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:18:34,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:18:34,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:18:31" (1/3) ... [2022-11-26 00:18:34,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d90ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:34, skipping insertion in model container [2022-11-26 00:18:34,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:32" (2/3) ... [2022-11-26 00:18:34,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d90ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:34, skipping insertion in model container [2022-11-26 00:18:34,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:34" (3/3) ... [2022-11-26 00:18:34,219 INFO L112 eAbstractionObserver]: Analyzing ICFG freire1.c [2022-11-26 00:18:34,241 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:18:34,242 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:18:34,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:18:34,306 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;@398a483a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:18:34,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:18:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-11-26 00:18:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:18:34,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:34,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:34,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:34,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1818803301, now seen corresponding path program 1 times [2022-11-26 00:18:34,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:18:34,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105829992] [2022-11-26 00:18:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:34,342 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 [2022-11-26 00:18:34,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:18:34,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/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) [2022-11-26 00:18:34,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/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 [2022-11-26 00:18:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:34,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-26 00:18:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:34,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:18:34,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:18:34,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105829992] [2022-11-26 00:18:34,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105829992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:34,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:34,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:18:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522396325] [2022-11-26 00:18:34,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:34,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:18:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:18:35,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:18:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:18:35,005 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-11-26 00:18:35,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:35,029 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2022-11-26 00:18:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:18:35,031 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 [2022-11-26 00:18:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:35,039 INFO L225 Difference]: With dead ends: 30 [2022-11-26 00:18:35,039 INFO L226 Difference]: Without dead ends: 12 [2022-11-26 00:18:35,043 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 [2022-11-26 00:18:35,047 INFO L413 NwaCegarLoop]: 17 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, 17 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 [2022-11-26 00:18:35,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-26 00:18:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-26 00:18:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-11-26 00:18:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-11-26 00:18:35,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2022-11-26 00:18:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:35,092 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-11-26 00:18:35,093 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) [2022-11-26 00:18:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-11-26 00:18:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:18:35,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:35,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:35,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/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 [2022-11-26 00:18:35,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/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 [2022-11-26 00:18:35,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:35,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1811355551, now seen corresponding path program 1 times [2022-11-26 00:18:35,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:18:35,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449818521] [2022-11-26 00:18:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:35,330 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 [2022-11-26 00:18:35,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:18:35,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/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) [2022-11-26 00:18:35,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/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 [2022-11-26 00:18:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:18:35,773 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:18:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:18:36,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2022-11-26 00:18:36,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [910959641] [2022-11-26 00:18:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:36,195 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:18:36,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:18:36,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:18:36,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42507a0-f63a-44c2-8c4e-2e5feca9eb05/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-26 00:18:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:18:36,997 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:18:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat