./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7 --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 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:53:13,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:53:13,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:53:13,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:53:13,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:53:13,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:53:13,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:53:13,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:53:13,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:53:13,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:53:13,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:53:13,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:53:13,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:53:13,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:53:13,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:53:14,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:53:14,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:53:14,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:53:14,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:53:14,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:53:14,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:53:14,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:53:14,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:53:14,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:53:14,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:53:14,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:53:14,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:53:14,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:53:14,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:53:14,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:53:14,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:53:14,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:53:14,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:53:14,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:53:14,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:53:14,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:53:14,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:53:14,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:53:14,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:53:14,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:53:14,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:53:14,046 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:53:14,096 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:53:14,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:53:14,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:53:14,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:53:14,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:53:14,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:53:14,098 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:53:14,099 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:53:14,099 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:53:14,099 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:53:14,100 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:53:14,101 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:53:14,101 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:53:14,101 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:53:14,102 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:53:14,102 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:53:14,102 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:53:14,103 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:53:14,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:53:14,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:53:14,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:53:14,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:53:14,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:53:14,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:53:14,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:53:14,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:53:14,108 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:53:14,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:53:14,108 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:53:14,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:53:14,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:53:14,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:53:14,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:53:14,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:53:14,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:53:14,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:53:14,111 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:53:14,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:53:14,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:53:14,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:53:14,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:53:14,112 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 [2021-11-25 18:53:14,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:53:14,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:53:14,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:53:14,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:53:14,433 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:53:14,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2021-11-25 18:53:14,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/data/0b2a1d1cd/7f356116b1174b34be9d3b0d47825e3a/FLAGecb51ce52 [2021-11-25 18:53:14,939 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:53:14,939 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2021-11-25 18:53:14,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/data/0b2a1d1cd/7f356116b1174b34be9d3b0d47825e3a/FLAGecb51ce52 [2021-11-25 18:53:15,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/data/0b2a1d1cd/7f356116b1174b34be9d3b0d47825e3a [2021-11-25 18:53:15,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:53:15,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:53:15,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:53:15,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:53:15,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:53:15,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a8dca9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15, skipping insertion in model container [2021-11-25 18:53:15,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:53:15,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:53:15,562 WARN L230 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_c3d49bec-b021-43a0-8d20-ada906a8a2e2/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2021-11-25 18:53:15,606 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:53:15,616 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:53:15,630 WARN L230 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_c3d49bec-b021-43a0-8d20-ada906a8a2e2/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2021-11-25 18:53:15,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:53:15,679 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:53:15,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15 WrapperNode [2021-11-25 18:53:15,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:53:15,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:53:15,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:53:15,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:53:15,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,732 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2021-11-25 18:53:15,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:53:15,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:53:15,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:53:15,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:53:15,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:53:15,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:53:15,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:53:15,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:53:15,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15" (1/1) ... [2021-11-25 18:53:15,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:53:15,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:15,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:53:15,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:53:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:53:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:53:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:53:15,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:53:15,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:53:15,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:53:15,927 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:53:15,929 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:53:16,043 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:53:16,056 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:53:16,056 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:53:16,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:16 BoogieIcfgContainer [2021-11-25 18:53:16,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:53:16,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:53:16,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:53:16,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:53:16,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:53:15" (1/3) ... [2021-11-25 18:53:16,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b929475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:53:16, skipping insertion in model container [2021-11-25 18:53:16,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:15" (2/3) ... [2021-11-25 18:53:16,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b929475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:53:16, skipping insertion in model container [2021-11-25 18:53:16,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:16" (3/3) ... [2021-11-25 18:53:16,068 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound1.c [2021-11-25 18:53:16,073 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:53:16,073 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:53:16,146 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:53:16,153 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:53:16,153 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:53:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:53:16,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:53:16,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:16,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:53:16,200 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:16,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2021-11-25 18:53:16,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:16,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446226182] [2021-11-25 18:53:16,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:16,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:16,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:16,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446226182] [2021-11-25 18:53:16,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446226182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:16,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:16,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:53:16,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892259510] [2021-11-25 18:53:16,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:16,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:53:16,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:16,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:53:16,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:53:16,443 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2021-11-25 18:53:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:16,494 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2021-11-25 18:53:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:53:16,497 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 [2021-11-25 18:53:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:16,513 INFO L225 Difference]: With dead ends: 35 [2021-11-25 18:53:16,513 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 18:53:16,522 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:53:16,533 INFO L933 BasicCegarLoop]: 22 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, 22 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 [2021-11-25 18:53:16,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:53:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 18:53:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 18:53:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:53:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-11-25 18:53:16,582 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2021-11-25 18:53:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:16,583 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-11-25 18:53:16,583 INFO L471 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) [2021-11-25 18:53:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-11-25 18:53:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:53:16,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:16,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:16,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:53:16,600 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:16,601 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2021-11-25 18:53:16,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:16,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152444168] [2021-11-25 18:53:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:16,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:16,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:16,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152444168] [2021-11-25 18:53:16,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152444168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:16,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:16,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:53:16,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660441361] [2021-11-25 18:53:16,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:16,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:53:16,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:53:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:53:16,673 INFO L87 Difference]: Start difference. First operand 16 states and 22 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) [2021-11-25 18:53:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:16,697 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-11-25 18:53:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:53:16,698 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 [2021-11-25 18:53:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:16,699 INFO L225 Difference]: With dead ends: 27 [2021-11-25 18:53:16,699 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 18:53:16,700 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:53:16,702 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 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 [2021-11-25 18:53:16,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:53:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 18:53:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 18:53:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:53:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-25 18:53:16,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2021-11-25 18:53:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:16,710 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-25 18:53:16,710 INFO L471 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) [2021-11-25 18:53:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-25 18:53:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:53:16,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:16,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:16,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:53:16,712 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:16,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2021-11-25 18:53:16,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:16,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971364696] [2021-11-25 18:53:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:16,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:16,726 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:53:16,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397202603] [2021-11-25 18:53:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:16,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:16,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:16,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:16,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:53:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:53:16,822 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:53:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:53:16,858 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 18:53:16,858 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:53:16,860 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:53:16,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:17,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:17,091 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-25 18:53:17,094 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:53:17,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:53:17 BoogieIcfgContainer [2021-11-25 18:53:17,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:53:17,126 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:53:17,126 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:53:17,126 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:53:17,127 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:16" (3/4) ... [2021-11-25 18:53:17,130 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 18:53:17,130 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:53:17,132 INFO L158 Benchmark]: Toolchain (without parser) took 1798.47ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 49.1MB in the beginning and 77.9MB in the end (delta: -28.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:53:17,133 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 86.0MB. Free memory was 66.0MB in the beginning and 65.9MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:53:17,138 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.62ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 48.9MB in the beginning and 80.2MB in the end (delta: -31.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:53:17,141 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.76ms. Allocated memory is still 104.9MB. Free memory was 80.2MB in the beginning and 79.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:53:17,144 INFO L158 Benchmark]: Boogie Preprocessor took 34.67ms. Allocated memory is still 104.9MB. Free memory was 79.0MB in the beginning and 77.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:53:17,145 INFO L158 Benchmark]: RCFGBuilder took 290.17ms. Allocated memory is still 104.9MB. Free memory was 77.7MB in the beginning and 68.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:53:17,146 INFO L158 Benchmark]: TraceAbstraction took 1061.16ms. Allocated memory is still 104.9MB. Free memory was 67.6MB in the beginning and 78.6MB in the end (delta: -11.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:53:17,146 INFO L158 Benchmark]: Witness Printer took 4.49ms. Allocated memory is still 104.9MB. Free memory was 78.6MB in the beginning and 77.9MB in the end (delta: 710.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:53:17,150 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 86.0MB. Free memory was 66.0MB in the beginning and 65.9MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.62ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 48.9MB in the beginning and 80.2MB in the end (delta: -31.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.76ms. Allocated memory is still 104.9MB. Free memory was 80.2MB in the beginning and 79.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 34.67ms. Allocated memory is still 104.9MB. Free memory was 79.0MB in the beginning and 77.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 290.17ms. Allocated memory is still 104.9MB. Free memory was 77.7MB in the beginning and 68.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1061.16ms. Allocated memory is still 104.9MB. Free memory was 67.6MB in the beginning and 78.6MB in the end (delta: -11.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.49ms. Allocated memory is still 104.9MB. Free memory was 78.6MB in the beginning and 77.9MB in the end (delta: 710.7kB). Peak memory consumption was 2.1MB. 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 34. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) 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, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 78 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 41 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=18occurred 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, 0.1s 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 [2021-11-25 18:53:17,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7 --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 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:53:19,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:53:19,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:53:19,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:53:19,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:53:19,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:53:19,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:53:19,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:53:19,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:53:19,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:53:19,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:53:19,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:53:19,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:53:19,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:53:19,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:53:19,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:53:19,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:53:19,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:53:19,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:53:19,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:53:19,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:53:19,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:53:19,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:53:19,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:53:19,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:53:19,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:53:19,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:53:19,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:53:19,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:53:19,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:53:19,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:53:19,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:53:19,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:53:19,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:53:19,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:53:19,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:53:19,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:53:19,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:53:19,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:53:19,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:53:19,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:53:19,700 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 18:53:19,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:53:19,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:53:19,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:53:19,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:53:19,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:53:19,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:53:19,746 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:53:19,746 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:53:19,747 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:53:19,747 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:53:19,748 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:53:19,748 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:53:19,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:53:19,750 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:53:19,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:53:19,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:53:19,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:53:19,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:53:19,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:53:19,751 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:53:19,751 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:53:19,752 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:53:19,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:53:19,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:53:19,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:53:19,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:53:19,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:53:19,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:53:19,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:53:19,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:53:19,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:53:19,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:53:19,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:53:19,755 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:53:19,755 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:53:19,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:53:19,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:53:19,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:53:19,756 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_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 [2021-11-25 18:53:20,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:53:20,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:53:20,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:53:20,143 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:53:20,144 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:53:20,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2021-11-25 18:53:20,218 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/data/c2e721569/fabb4df9a19644689663babe7b9dc737/FLAG30b4351f4 [2021-11-25 18:53:20,816 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:53:20,817 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2021-11-25 18:53:20,823 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/data/c2e721569/fabb4df9a19644689663babe7b9dc737/FLAG30b4351f4 [2021-11-25 18:53:21,202 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/data/c2e721569/fabb4df9a19644689663babe7b9dc737 [2021-11-25 18:53:21,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:53:21,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:53:21,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:53:21,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:53:21,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:53:21,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@724527f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21, skipping insertion in model container [2021-11-25 18:53:21,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:53:21,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:53:21,412 WARN L230 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_c3d49bec-b021-43a0-8d20-ada906a8a2e2/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2021-11-25 18:53:21,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:53:21,472 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:53:21,490 WARN L230 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_c3d49bec-b021-43a0-8d20-ada906a8a2e2/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2021-11-25 18:53:21,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:53:21,522 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:53:21,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21 WrapperNode [2021-11-25 18:53:21,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:53:21,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:53:21,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:53:21,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:53:21,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,561 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2021-11-25 18:53:21,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:53:21,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:53:21,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:53:21,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:53:21,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:53:21,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:53:21,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:53:21,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:53:21,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21" (1/1) ... [2021-11-25 18:53:21,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:53:21,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:21,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:53:21,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:53:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:53:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:53:21,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:53:21,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:53:21,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:53:21,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:53:21,742 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:53:21,744 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:53:24,044 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:53:24,050 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:53:24,051 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:53:24,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:24 BoogieIcfgContainer [2021-11-25 18:53:24,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:53:24,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:53:24,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:53:24,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:53:24,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:53:21" (1/3) ... [2021-11-25 18:53:24,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a02649e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:53:24, skipping insertion in model container [2021-11-25 18:53:24,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:21" (2/3) ... [2021-11-25 18:53:24,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a02649e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:53:24, skipping insertion in model container [2021-11-25 18:53:24,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:24" (3/3) ... [2021-11-25 18:53:24,061 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound1.c [2021-11-25 18:53:24,066 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:53:24,066 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:53:24,113 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:53:24,142 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:53:24,142 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:53:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:53:24,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:53:24,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:24,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:24,165 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2021-11-25 18:53:24,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:53:24,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798816916] [2021-11-25 18:53:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:24,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:53:24,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:53:24,190 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:53:24,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:53:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:24,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 18:53:24,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:24,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:53:24,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:53:24,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798816916] [2021-11-25 18:53:24,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798816916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:24,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:24,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:53:24,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901238201] [2021-11-25 18:53:24,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:24,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:53:24,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:53:24,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:53:24,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:53:24,473 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2021-11-25 18:53:24,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:24,494 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2021-11-25 18:53:24,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:53:24,496 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 [2021-11-25 18:53:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:24,505 INFO L225 Difference]: With dead ends: 40 [2021-11-25 18:53:24,505 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 18:53:24,508 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:53:24,512 INFO L933 BasicCegarLoop]: 27 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, 27 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 [2021-11-25 18:53:24,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:53:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 18:53:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 18:53:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:53:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-11-25 18:53:24,550 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2021-11-25 18:53:24,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:24,551 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-11-25 18:53:24,551 INFO L471 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) [2021-11-25 18:53:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-11-25 18:53:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:53:24,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:24,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:24,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:24,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:53:24,767 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:24,769 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2021-11-25 18:53:24,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:53:24,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544500304] [2021-11-25 18:53:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:24,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:53:24,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:53:24,773 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:53:24,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:53:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:24,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:53:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:25,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:53:25,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:53:25,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544500304] [2021-11-25 18:53:25,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544500304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:25,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:25,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:53:25,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422912620] [2021-11-25 18:53:25,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:25,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:53:25,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:53:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:53:25,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:53:25,042 INFO L87 Difference]: Start difference. First operand 17 states and 23 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) [2021-11-25 18:53:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:25,077 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-11-25 18:53:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:53:25,079 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 [2021-11-25 18:53:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:25,080 INFO L225 Difference]: With dead ends: 28 [2021-11-25 18:53:25,080 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 18:53:25,081 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:53:25,082 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:25,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:53:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 18:53:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 18:53:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:53:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-11-25 18:53:25,090 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2021-11-25 18:53:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:25,091 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-11-25 18:53:25,091 INFO L471 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) [2021-11-25 18:53:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-11-25 18:53:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:53:25,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:25,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:25,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:25,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:53:25,304 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2021-11-25 18:53:25,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:53:25,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7737372] [2021-11-25 18:53:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:25,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:53:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:53:25,307 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:53:25,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:53:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:25,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:53:25,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:25,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:53:25,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:53:25,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7737372] [2021-11-25 18:53:25,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7737372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:25,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:25,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:53:25,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403231313] [2021-11-25 18:53:25,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:25,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:53:25,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:53:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:53:25,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:53:25,650 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2021-11-25 18:53:28,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:30,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:32,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:35,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:37,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:40,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:42,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:42,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:42,992 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-25 18:53:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:53:43,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 [2021-11-25 18:53:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:43,090 INFO L225 Difference]: With dead ends: 33 [2021-11-25 18:53:43,090 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 18:53:43,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:53:43,092 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:43,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 76 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 17.3s Time] [2021-11-25 18:53:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 18:53:43,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-25 18:53:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 18:53:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-25 18:53:43,104 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 8 [2021-11-25 18:53:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:43,104 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-25 18:53:43,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2021-11-25 18:53:43,105 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-25 18:53:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:53:43,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:43,106 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:43,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-25 18:53:43,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:53:43,316 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:43,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:43,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2021-11-25 18:53:43,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:53:43,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104240236] [2021-11-25 18:53:43,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:43,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:53:43,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:53:43,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:53:43,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:53:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:44,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:53:44,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:45,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:52,239 WARN L838 $PredicateComparison]: unable to prove that (= (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvneg (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (_ bv6 32)) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from false [2021-11-25 18:53:54,270 WARN L860 $PredicateComparison]: unable to prove that (= (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvneg (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (_ bv6 32)) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from true [2021-11-25 18:54:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:17,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:54:17,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104240236] [2021-11-25 18:54:17,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104240236] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:17,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:54:17,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2021-11-25 18:54:17,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263443664] [2021-11-25 18:54:17,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:17,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:54:17,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:54:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:54:17,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=56, Unknown=2, NotChecked=14, Total=90 [2021-11-25 18:54:17,839 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:54:20,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:54:23,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:54:25,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:54:25,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:25,328 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-11-25 18:54:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:54:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-25 18:54:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:25,425 INFO L225 Difference]: With dead ends: 31 [2021-11-25 18:54:25,425 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 18:54:25,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=22, Invalid=70, Unknown=2, NotChecked=16, Total=110 [2021-11-25 18:54:25,428 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:25,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 62 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 3 Unknown, 32 Unchecked, 7.2s Time] [2021-11-25 18:54:25,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 18:54:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 18:54:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 18:54:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-11-25 18:54:25,439 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 13 [2021-11-25 18:54:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:25,439 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-11-25 18:54:25,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:54:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-11-25 18:54:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:54:25,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:25,441 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:25,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-25 18:54:25,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:54:25,662 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash 892115231, now seen corresponding path program 1 times [2021-11-25 18:54:25,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:54:25,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731772187] [2021-11-25 18:54:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:25,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:54:25,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:54:25,674 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:54:25,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 18:54:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:54:26,862 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:54:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:54:28,108 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-25 18:54:28,109 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:54:28,110 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:54:28,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:54:28,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:54:28,315 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-11-25 18:54:28,317 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:54:28,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:54:28 BoogieIcfgContainer [2021-11-25 18:54:28,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:54:28,361 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:54:28,361 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:54:28,361 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:54:28,362 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:24" (3/4) ... [2021-11-25 18:54:28,364 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 18:54:28,423 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:54:28,423 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:54:28,424 INFO L158 Benchmark]: Toolchain (without parser) took 67218.34ms. Allocated memory was 73.4MB in the beginning and 94.4MB in the end (delta: 21.0MB). Free memory was 51.1MB in the beginning and 62.1MB in the end (delta: -11.0MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. [2021-11-25 18:54:28,424 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 52.4MB. Free memory was 32.7MB in the beginning and 32.7MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:54:28,425 INFO L158 Benchmark]: CACSL2BoogieTranslator took 311.57ms. Allocated memory is still 73.4MB. Free memory was 50.9MB in the beginning and 53.9MB in the end (delta: -3.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:54:28,425 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.48ms. Allocated memory is still 73.4MB. Free memory was 53.9MB in the beginning and 52.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:54:28,426 INFO L158 Benchmark]: Boogie Preprocessor took 28.31ms. Allocated memory is still 73.4MB. Free memory was 52.1MB in the beginning and 50.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:54:28,426 INFO L158 Benchmark]: RCFGBuilder took 2462.17ms. Allocated memory is still 73.4MB. Free memory was 50.7MB in the beginning and 40.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:54:28,426 INFO L158 Benchmark]: TraceAbstraction took 64305.86ms. Allocated memory was 73.4MB in the beginning and 94.4MB in the end (delta: 21.0MB). Free memory was 40.3MB in the beginning and 64.1MB in the end (delta: -23.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:54:28,427 INFO L158 Benchmark]: Witness Printer took 62.23ms. Allocated memory is still 94.4MB. Free memory was 64.1MB in the beginning and 62.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:54:28,430 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 52.4MB. Free memory was 32.7MB in the beginning and 32.7MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 311.57ms. Allocated memory is still 73.4MB. Free memory was 50.9MB in the beginning and 53.9MB in the end (delta: -3.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.48ms. Allocated memory is still 73.4MB. Free memory was 53.9MB in the beginning and 52.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.31ms. Allocated memory is still 73.4MB. Free memory was 52.1MB in the beginning and 50.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2462.17ms. Allocated memory is still 73.4MB. Free memory was 50.7MB in the beginning and 40.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 64305.86ms. Allocated memory was 73.4MB in the beginning and 94.4MB in the end (delta: 21.0MB). Free memory was 40.3MB in the beginning and 64.1MB in the end (delta: -23.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 62.23ms. Allocated memory is still 94.4MB. Free memory was 64.1MB in the beginning and 62.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=0.10416666666666682, counter=0, r=1, s=3.25, x=0.10416666666666682] [L33] EXPR counter++ VAL [a=0.10416666666666682, counter=1, counter++=0, r=1, s=3.25, x=0.10416666666666682] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=1, counter=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [a=0.10416666666666682, counter=1, r=1, s=3.25, x=0.10416666666666682] [L35] CALL __VERIFIER_assert(((4*r*r*r - 6*r*r + 3*r) + (int)(4*x - 4*a)) == 1) VAL [\old(cond)=1, counter=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(((4*r*r*r - 6*r*r + 3*r) + (int)(4*x - 4*a)) == 1) VAL [a=0.10416666666666682, counter=1, r=1, s=3.25, x=0.10416666666666682] [L36] CALL __VERIFIER_assert((int)(8*r*s - 24*a + 16*r - 12*s + 24*x - 3 == 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, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 64.2s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 25.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 24.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20 mSDsluCounter, 224 SdHoareTripleChecker+Invalid, 24.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 32 IncrementalHoareTripleChecker+Unchecked, 137 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33 IncrementalHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 87 mSDtfsCounter, 33 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 15.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=3, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 33.8s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 44 ConstructedInterpolants, 1 QuantifiedInterpolants, 303 SizeOfPredicates, 5 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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 proved your program to be incorrect! [2021-11-25 18:54:28,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d49bec-b021-43a0-8d20-ada906a8a2e2/bin/utaipan-eEHZpOm5b7/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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE