./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan --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 b31bca48eb92619ef21bf7c6230aa1fe8fb46a8a ..................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan --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 b31bca48eb92619ef21bf7c6230aa1fe8fb46a8a .............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:13:21,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:13:21,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:13:21,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:13:21,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:13:21,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:13:21,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:13:21,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:13:21,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:13:21,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:13:21,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:13:21,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:13:21,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:13:21,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:13:21,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:13:21,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:13:21,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:13:21,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:13:21,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:13:21,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:13:21,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:13:21,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:13:21,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:13:21,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:13:21,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:13:21,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:13:21,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:13:21,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:13:21,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:13:21,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:13:21,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:13:21,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:13:21,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:13:21,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:13:21,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:13:21,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:13:21,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:13:21,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:13:21,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:13:21,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:13:21,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:13:21,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 11:13:21,769 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:13:21,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:13:21,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:13:21,770 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:13:21,770 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:13:21,771 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:13:21,771 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 11:13:21,771 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:13:21,771 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:13:21,771 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 11:13:21,771 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 11:13:21,771 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:13:21,771 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 11:13:21,772 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 11:13:21,772 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 11:13:21,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:13:21,772 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:13:21,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:13:21,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:13:21,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:13:21,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 11:13:21,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:13:21,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 11:13:21,773 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:13:21,773 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:13:21,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 11:13:21,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:13:21,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 11:13:21,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:13:21,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:13:21,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:13:21,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:13:21,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:13:21,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 11:13:21,775 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 11:13:21,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 11:13:21,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 11:13:21,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:13:21,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:13:21,775 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-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b31bca48eb92619ef21bf7c6230aa1fe8fb46a8a [2020-12-09 11:13:21,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:13:21,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:13:21,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:13:21,971 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:13:21,971 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:13:21,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2020-12-09 11:13:22,015 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/data/6684dbc18/2b3c806e80044c25a0aa0b40d720f57e/FLAG448b0383c [2020-12-09 11:13:22,362 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:13:22,363 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2020-12-09 11:13:22,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/data/6684dbc18/2b3c806e80044c25a0aa0b40d720f57e/FLAG448b0383c [2020-12-09 11:13:22,376 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/data/6684dbc18/2b3c806e80044c25a0aa0b40d720f57e [2020-12-09 11:13:22,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:13:22,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:13:22,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:13:22,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:13:22,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:13:22,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:13:22" (1/1) ... [2020-12-09 11:13:22,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1800f93a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22, skipping insertion in model container [2020-12-09 11:13:22,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:13:22" (1/1) ... [2020-12-09 11:13:22,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:13:22,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:13:22,507 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2020-12-09 11:13:22,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:13:22,536 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:13:22,544 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2020-12-09 11:13:22,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:13:22,565 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:13:22,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22 WrapperNode [2020-12-09 11:13:22,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:13:22,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:13:22,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:13:22,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:13:22,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22" (1/1) ... [2020-12-09 11:13:22,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22" (1/1) ... [2020-12-09 11:13:22,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:13:22,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:13:22,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:13:22,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:13:22,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22" (1/1) ... [2020-12-09 11:13:22,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22" (1/1) ... [2020-12-09 11:13:22,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22" (1/1) ... [2020-12-09 11:13:22,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22" (1/1) ... [2020-12-09 11:13:22,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22" (1/1) ... [2020-12-09 11:13:22,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22" (1/1) ... [2020-12-09 11:13:22,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22" (1/1) ... [2020-12-09 11:13:22,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:13:22,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:13:22,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:13:22,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:13:22,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:13:22,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 11:13:22,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:13:22,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:13:22,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:13:22,880 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:13:22,881 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-09 11:13:22,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:13:22 BoogieIcfgContainer [2020-12-09 11:13:22,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:13:22,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:13:22,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:13:22,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:13:22,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:13:22" (1/3) ... [2020-12-09 11:13:22,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24de9244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:13:22, skipping insertion in model container [2020-12-09 11:13:22,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:22" (2/3) ... [2020-12-09 11:13:22,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24de9244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:13:22, skipping insertion in model container [2020-12-09 11:13:22,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:13:22" (3/3) ... [2020-12-09 11:13:22,890 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2020-12-09 11:13:22,902 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:13:22,904 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 11:13:22,912 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 11:13:22,928 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:13:22,928 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 11:13:22,928 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:13:22,929 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:13:22,929 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:13:22,929 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:13:22,929 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:13:22,929 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:13:22,939 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-09 11:13:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 11:13:22,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:13:22,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 11:13:22,943 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:13:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:13:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash 113318109, now seen corresponding path program 1 times [2020-12-09 11:13:22,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:13:22,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209394745] [2020-12-09 11:13:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:13:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:13:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:13:23,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209394745] [2020-12-09 11:13:23,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:13:23,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:13:23,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66408263] [2020-12-09 11:13:23,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 11:13:23,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:13:23,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 11:13:23,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 11:13:23,062 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-12-09 11:13:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:13:23,074 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2020-12-09 11:13:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 11:13:23,075 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 11:13:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:13:23,080 INFO L225 Difference]: With dead ends: 57 [2020-12-09 11:13:23,081 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 11:13:23,083 INFO L677 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 [2020-12-09 11:13:23,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 11:13:23,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-09 11:13:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 11:13:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-09 11:13:23,106 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 5 [2020-12-09 11:13:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:13:23,106 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-09 11:13:23,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 11:13:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-09 11:13:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 11:13:23,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:13:23,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 11:13:23,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 11:13:23,107 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:13:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:13:23,108 INFO L82 PathProgramCache]: Analyzing trace with hash 111966592, now seen corresponding path program 1 times [2020-12-09 11:13:23,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:13:23,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605209974] [2020-12-09 11:13:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:13:23,121 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:13:23,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209364245] [2020-12-09 11:13:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:13:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:13:23,162 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:13:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:13:23,173 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:13:23,197 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 11:13:23,197 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 11:13:23,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 11:13:23,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:13:23 BoogieIcfgContainer [2020-12-09 11:13:23,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:13:23,463 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:13:23,463 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:13:23,464 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:13:23,465 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:13:22" (3/4) ... [2020-12-09 11:13:23,472 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 11:13:23,473 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:13:23,478 INFO L168 Benchmark]: Toolchain (without parser) took 1095.05 ms. Allocated memory is still 94.4 MB. Free memory was 55.3 MB in the beginning and 41.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2020-12-09 11:13:23,480 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 94.4 MB. Free memory was 71.6 MB in the beginning and 71.5 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:13:23,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 185.41 ms. Allocated memory is still 94.4 MB. Free memory was 55.2 MB in the beginning and 70.7 MB in the end (delta: -15.5 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2020-12-09 11:13:23,484 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.17 ms. Allocated memory is still 94.4 MB. Free memory was 70.7 MB in the beginning and 69.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:13:23,486 INFO L168 Benchmark]: Boogie Preprocessor took 23.47 ms. Allocated memory is still 94.4 MB. Free memory was 69.0 MB in the beginning and 67.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:13:23,488 INFO L168 Benchmark]: RCFGBuilder took 257.16 ms. Allocated memory is still 94.4 MB. Free memory was 67.9 MB in the beginning and 69.3 MB in the end (delta: -1.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 11:13:23,490 INFO L168 Benchmark]: TraceAbstraction took 577.92 ms. Allocated memory is still 94.4 MB. Free memory was 68.6 MB in the beginning and 42.4 MB in the end (delta: 26.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-12-09 11:13:23,491 INFO L168 Benchmark]: Witness Printer took 9.95 ms. Allocated memory is still 94.4 MB. Free memory was 42.4 MB in the beginning and 41.9 MB in the end (delta: 462.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:13:23,502 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 94.4 MB. Free memory was 71.6 MB in the beginning and 71.5 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 185.41 ms. Allocated memory is still 94.4 MB. Free memory was 55.2 MB in the beginning and 70.7 MB in the end (delta: -15.5 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.17 ms. Allocated memory is still 94.4 MB. Free memory was 70.7 MB in the beginning and 69.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.47 ms. Allocated memory is still 94.4 MB. Free memory was 69.0 MB in the beginning and 67.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 257.16 ms. Allocated memory is still 94.4 MB. Free memory was 67.9 MB in the beginning and 69.3 MB in the end (delta: -1.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 577.92 ms. Allocated memory is still 94.4 MB. Free memory was 68.6 MB in the beginning and 42.4 MB in the end (delta: 26.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 9.95 ms. Allocated memory is still 94.4 MB. Free memory was 42.4 MB in the beginning and 41.9 MB in the end (delta: 462.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<20 [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:13:25,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:13:25,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:13:25,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:13:25,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:13:25,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:13:25,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:13:25,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:13:25,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:13:25,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:13:25,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:13:25,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:13:25,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:13:25,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:13:25,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:13:25,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:13:25,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:13:25,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:13:25,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:13:25,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:13:25,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:13:25,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:13:25,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:13:25,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:13:25,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:13:25,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:13:25,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:13:25,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:13:25,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:13:25,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:13:25,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:13:25,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:13:25,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:13:25,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:13:25,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:13:25,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:13:25,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:13:25,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:13:25,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:13:25,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:13:25,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:13:25,214 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 11:13:25,237 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:13:25,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:13:25,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:13:25,239 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:13:25,239 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:13:25,239 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:13:25,239 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:13:25,239 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:13:25,239 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:13:25,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:13:25,240 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:13:25,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:13:25,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:13:25,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 11:13:25,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:13:25,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 11:13:25,241 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:13:25,241 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 11:13:25,241 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 11:13:25,241 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:13:25,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 11:13:25,241 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:13:25,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 11:13:25,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:13:25,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 11:13:25,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:13:25,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:13:25,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:13:25,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:13:25,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 11:13:25,243 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 11:13:25,243 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 11:13:25,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 11:13:25,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:13:25,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:13:25,243 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-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b31bca48eb92619ef21bf7c6230aa1fe8fb46a8a [2020-12-09 11:13:25,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:13:25,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:13:25,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:13:25,502 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:13:25,503 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:13:25,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2020-12-09 11:13:25,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/data/787eb2e25/774b53fd5e3943e59d7fae0c72311109/FLAG97db25af9 [2020-12-09 11:13:26,024 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:13:26,025 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2020-12-09 11:13:26,030 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/data/787eb2e25/774b53fd5e3943e59d7fae0c72311109/FLAG97db25af9 [2020-12-09 11:13:26,041 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/data/787eb2e25/774b53fd5e3943e59d7fae0c72311109 [2020-12-09 11:13:26,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:13:26,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:13:26,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:13:26,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:13:26,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:13:26,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:13:26" (1/1) ... [2020-12-09 11:13:26,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e59348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26, skipping insertion in model container [2020-12-09 11:13:26,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:13:26" (1/1) ... [2020-12-09 11:13:26,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:13:26,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:13:26,157 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2020-12-09 11:13:26,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:13:26,184 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:13:26,193 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2020-12-09 11:13:26,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:13:26,214 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:13:26,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26 WrapperNode [2020-12-09 11:13:26,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:13:26,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:13:26,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:13:26,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:13:26,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26" (1/1) ... [2020-12-09 11:13:26,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26" (1/1) ... [2020-12-09 11:13:26,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:13:26,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:13:26,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:13:26,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:13:26,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26" (1/1) ... [2020-12-09 11:13:26,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26" (1/1) ... [2020-12-09 11:13:26,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26" (1/1) ... [2020-12-09 11:13:26,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26" (1/1) ... [2020-12-09 11:13:26,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26" (1/1) ... [2020-12-09 11:13:26,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26" (1/1) ... [2020-12-09 11:13:26,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26" (1/1) ... [2020-12-09 11:13:26,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:13:26,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:13:26,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:13:26,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:13:26,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:13:26,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 11:13:26,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:13:26,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:13:26,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:13:40,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:13:40,142 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-09 11:13:40,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:13:40 BoogieIcfgContainer [2020-12-09 11:13:40,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:13:40,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:13:40,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:13:40,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:13:40,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:13:26" (1/3) ... [2020-12-09 11:13:40,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76070402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:13:40, skipping insertion in model container [2020-12-09 11:13:40,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:13:26" (2/3) ... [2020-12-09 11:13:40,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76070402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:13:40, skipping insertion in model container [2020-12-09 11:13:40,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:13:40" (3/3) ... [2020-12-09 11:13:40,155 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2020-12-09 11:13:40,165 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:13:40,168 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 11:13:40,175 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 11:13:40,191 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:13:40,192 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 11:13:40,192 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:13:40,192 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:13:40,192 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:13:40,192 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:13:40,192 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:13:40,192 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:13:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-09 11:13:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 11:13:40,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:13:40,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 11:13:40,205 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:13:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:13:40,209 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2020-12-09 11:13:40,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:13:40,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983847029] [2020-12-09 11:13:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 11:13:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:13:40,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 11:13:40,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:13:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:13:40,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:13:40,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983847029] [2020-12-09 11:13:40,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:13:40,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:13:40,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083508483] [2020-12-09 11:13:40,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 11:13:40,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:13:40,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 11:13:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 11:13:40,392 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-09 11:13:40,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:13:40,409 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-12-09 11:13:40,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 11:13:40,411 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 11:13:40,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:13:40,418 INFO L225 Difference]: With dead ends: 62 [2020-12-09 11:13:40,419 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 11:13:40,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 11:13:40,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 11:13:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 11:13:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 11:13:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-09 11:13:40,454 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2020-12-09 11:13:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:13:40,454 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-09 11:13:40,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 11:13:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-09 11:13:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 11:13:40,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:13:40,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 11:13:40,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 11:13:40,656 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:13:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:13:40,657 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-09 11:13:40,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:13:40,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175455941] [2020-12-09 11:13:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 11:13:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:13:40,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 11:13:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:13:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:13:40,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:13:40,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175455941] [2020-12-09 11:13:40,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:13:40,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:13:40,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186817228] [2020-12-09 11:13:40,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 11:13:40,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:13:40,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 11:13:40,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:13:40,938 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 5 states. [2020-12-09 11:14:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:00,759 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-09 11:14:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 11:14:00,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 11:14:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:00,761 INFO L225 Difference]: With dead ends: 39 [2020-12-09 11:14:00,761 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 11:14:00,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:14:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 11:14:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-12-09 11:14:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 11:14:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-09 11:14:00,770 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 6 [2020-12-09 11:14:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:00,770 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-09 11:14:00,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 11:14:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-09 11:14:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 11:14:00,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:00,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:00,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 11:14:00,973 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:14:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2020-12-09 11:14:00,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:00,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053428504] [2020-12-09 11:14:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 11:14:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:01,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 11:14:01,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:14:01,991 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-09 11:14:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:14:09,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:14:09,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053428504] [2020-12-09 11:14:09,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:09,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:14:09,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208187903] [2020-12-09 11:14:09,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 11:14:09,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:14:09,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 11:14:09,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:14:09,265 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 5 states. [2020-12-09 11:14:10,575 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-09 11:14:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:26,645 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-12-09 11:14:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 11:14:26,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 11:14:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:26,744 INFO L225 Difference]: With dead ends: 37 [2020-12-09 11:14:26,744 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 11:14:26,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:14:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 11:14:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-12-09 11:14:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:14:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-09 11:14:26,750 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2020-12-09 11:14:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:26,750 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-09 11:14:26,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 11:14:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-09 11:14:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 11:14:26,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:26,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:26,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 11:14:26,953 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:14:26,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:26,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1248817364, now seen corresponding path program 1 times [2020-12-09 11:14:26,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:26,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271119503] [2020-12-09 11:14:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 11:14:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:27,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:14:27,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:14:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:14:27,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:14:27,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271119503] [2020-12-09 11:14:27,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:27,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 11:14:27,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069705254] [2020-12-09 11:14:27,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:14:27,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:14:27,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:14:27,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:14:27,338 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-12-09 11:14:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:29,319 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-12-09 11:14:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:14:29,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 11:14:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:29,321 INFO L225 Difference]: With dead ends: 39 [2020-12-09 11:14:29,321 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 11:14:29,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:14:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 11:14:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 11:14:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 11:14:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-09 11:14:29,326 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 9 [2020-12-09 11:14:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:29,326 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-09 11:14:29,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:14:29,326 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-09 11:14:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 11:14:29,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:29,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:29,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 11:14:29,528 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:14:29,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:29,530 INFO L82 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2020-12-09 11:14:29,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:29,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824884491] [2020-12-09 11:14:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 11:14:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:14:30,851 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:15:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:15:24,452 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:15:24,703 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 11:15:24,703 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 11:15:24,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 11:15:24,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:15:24 BoogieIcfgContainer [2020-12-09 11:15:24,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:15:24,927 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:15:24,927 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:15:24,927 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:15:24,928 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:13:40" (3/4) ... [2020-12-09 11:15:24,929 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 11:15:24,955 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b87e4a81-270e-4938-9639-ac6f0e0f1749/bin/utaipan/witness.graphml [2020-12-09 11:15:24,955 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:15:24,956 INFO L168 Benchmark]: Toolchain (without parser) took 118912.36 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 40.5 MB in the beginning and 26.9 MB in the end (delta: 13.7 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2020-12-09 11:15:24,957 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 43.8 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:15:24,957 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.40 ms. Allocated memory is still 60.8 MB. Free memory was 40.3 MB in the beginning and 29.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 11:15:24,958 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.23 ms. Allocated memory is still 60.8 MB. Free memory was 29.0 MB in the beginning and 44.5 MB in the end (delta: -15.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 11:15:24,958 INFO L168 Benchmark]: Boogie Preprocessor took 29.08 ms. Allocated memory is still 60.8 MB. Free memory was 44.5 MB in the beginning and 43.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:15:24,958 INFO L168 Benchmark]: RCFGBuilder took 13848.82 ms. Allocated memory is still 60.8 MB. Free memory was 43.1 MB in the beginning and 27.2 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 11:15:24,959 INFO L168 Benchmark]: TraceAbstraction took 104776.88 ms. Allocated memory is still 77.6 MB. Free memory was 60.7 MB in the beginning and 28.9 MB in the end (delta: 31.8 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. [2020-12-09 11:15:24,959 INFO L168 Benchmark]: Witness Printer took 28.19 ms. Allocated memory is still 77.6 MB. Free memory was 28.9 MB in the beginning and 26.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:15:24,961 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 43.8 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 170.40 ms. Allocated memory is still 60.8 MB. Free memory was 40.3 MB in the beginning and 29.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.23 ms. Allocated memory is still 60.8 MB. Free memory was 29.0 MB in the beginning and 44.5 MB in the end (delta: -15.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.08 ms. Allocated memory is still 60.8 MB. Free memory was 44.5 MB in the beginning and 43.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 13848.82 ms. Allocated memory is still 60.8 MB. Free memory was 43.1 MB in the beginning and 27.2 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 104776.88 ms. Allocated memory is still 77.6 MB. Free memory was 60.7 MB in the beginning and 28.9 MB in the end (delta: 31.8 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. * Witness Printer took 28.19 ms. Allocated memory is still 77.6 MB. Free memory was 28.9 MB in the beginning and 26.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<20 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 104.7s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 39.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 44 SDslu, 88 SDs, 0 SdLazy, 59 SolverSat, 11 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 38.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=2, 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, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 25 ConstructedInterpolants, 0 QuantifiedInterpolants, 673 SizeOfPredicates, 10 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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 proved your program to be incorrect! Received shutdown request...