./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/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 b4e7938b4423950851166e0ea8765de2619e9f00 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:03:57,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:03:57,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:03:57,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:03:57,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:03:57,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:03:57,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:03:57,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:03:57,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:03:57,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:03:57,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:03:57,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:03:57,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:03:57,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:03:57,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:03:57,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:03:57,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:03:57,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:03:57,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:03:57,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:03:57,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:03:57,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:03:57,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:03:57,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:03:57,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:03:57,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:03:57,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:03:57,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:03:57,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:03:57,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:03:57,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:03:57,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:03:57,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:03:57,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:03:57,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:03:57,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:03:57,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:03:57,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:03:57,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:03:57,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:03:57,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:03:57,910 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 02:03:57,953 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:03:57,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:03:57,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:03:57,955 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:03:57,956 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:03:57,956 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:03:57,956 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:03:57,956 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:03:57,957 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:03:57,957 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:03:57,958 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:03:57,958 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:03:57,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:03:57,959 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:03:57,959 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:03:57,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:03:57,960 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:03:57,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:03:57,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:03:57,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:03:57,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:03:57,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:03:57,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:03:57,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:03:57,962 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:03:57,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:03:57,963 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:03:57,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:03:57,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:03:57,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:03:57,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:03:57,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:03:57,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:03:57,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:03:57,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:03:57,965 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:03:57,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:03:57,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:03:57,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:03:57,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:03:57,967 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_a8a02438-7c5d-41c6-bae7-3ed90eb79703/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4e7938b4423950851166e0ea8765de2619e9f00 [2020-11-30 02:03:58,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:03:58,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:03:58,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:03:58,328 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:03:58,328 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:03:58,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2020-11-30 02:03:58,411 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/data/c6298c378/aaa53898d85d44f7895ee2698a845753/FLAG4cd3e3d9d [2020-11-30 02:03:58,965 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:03:58,966 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2020-11-30 02:03:58,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/data/c6298c378/aaa53898d85d44f7895ee2698a845753/FLAG4cd3e3d9d [2020-11-30 02:03:59,310 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/data/c6298c378/aaa53898d85d44f7895ee2698a845753 [2020-11-30 02:03:59,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:03:59,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:03:59,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:03:59,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:03:59,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:03:59,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:03:59" (1/1) ... [2020-11-30 02:03:59,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a71c14e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59, skipping insertion in model container [2020-11-30 02:03:59,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:03:59" (1/1) ... [2020-11-30 02:03:59,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:03:59,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:03:59,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:03:59,609 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:03:59,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:03:59,679 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:03:59,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59 WrapperNode [2020-11-30 02:03:59,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:03:59,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:03:59,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:03:59,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:03:59,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59" (1/1) ... [2020-11-30 02:03:59,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59" (1/1) ... [2020-11-30 02:03:59,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:03:59,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:03:59,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:03:59,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:03:59,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59" (1/1) ... [2020-11-30 02:03:59,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59" (1/1) ... [2020-11-30 02:03:59,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59" (1/1) ... [2020-11-30 02:03:59,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59" (1/1) ... [2020-11-30 02:03:59,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59" (1/1) ... [2020-11-30 02:03:59,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59" (1/1) ... [2020-11-30 02:03:59,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59" (1/1) ... [2020-11-30 02:03:59,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:03:59,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:03:59,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:03:59,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:03:59,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/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 [2020-11-30 02:03:59,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:03:59,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:03:59,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:03:59,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:04:00,617 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:04:00,619 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-11-30 02:04:00,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:04:00 BoogieIcfgContainer [2020-11-30 02:04:00,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:04:00,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:04:00,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:04:00,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:04:00,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:03:59" (1/3) ... [2020-11-30 02:04:00,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f5d46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:04:00, skipping insertion in model container [2020-11-30 02:04:00,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:03:59" (2/3) ... [2020-11-30 02:04:00,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f5d46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:04:00, skipping insertion in model container [2020-11-30 02:04:00,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:04:00" (3/3) ... [2020-11-30 02:04:00,634 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.c [2020-11-30 02:04:00,650 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:04:00,655 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-11-30 02:04:00,667 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-11-30 02:04:00,720 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:04:00,721 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:04:00,721 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:04:00,721 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:04:00,721 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:04:00,722 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:04:00,722 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:04:00,722 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:04:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-30 02:04:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:04:00,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:00,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:04:00,750 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:00,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:00,757 INFO L82 PathProgramCache]: Analyzing trace with hash 165250771, now seen corresponding path program 1 times [2020-11-30 02:04:00,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:00,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576332751] [2020-11-30 02:04:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:00,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576332751] [2020-11-30 02:04:00,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:04:00,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:04:00,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383486300] [2020-11-30 02:04:00,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:04:00,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:00,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:04:00,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:04:00,996 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-30 02:04:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:01,017 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2020-11-30 02:04:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:04:01,019 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-30 02:04:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:01,029 INFO L225 Difference]: With dead ends: 65 [2020-11-30 02:04:01,030 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 02:04:01,033 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 [2020-11-30 02:04:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 02:04:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-30 02:04:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 02:04:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-11-30 02:04:01,073 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 5 [2020-11-30 02:04:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:01,073 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-11-30 02:04:01,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:04:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-11-30 02:04:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 02:04:01,075 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:01,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 02:04:01,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:04:01,075 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:01,077 INFO L82 PathProgramCache]: Analyzing trace with hash 735362312, now seen corresponding path program 1 times [2020-11-30 02:04:01,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:01,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810240431] [2020-11-30 02:04:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:01,106 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:01,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633425780] [2020-11-30 02:04:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/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 [2020-11-30 02:04:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:01,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:04:01,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:01,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:01,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810240431] [2020-11-30 02:04:01,277 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:01,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633425780] [2020-11-30 02:04:01,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:04:01,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 02:04:01,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055564789] [2020-11-30 02:04:01,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:04:01,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:01,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:04:01,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:04:01,281 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2020-11-30 02:04:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:01,339 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-11-30 02:04:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:04:01,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-30 02:04:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:01,341 INFO L225 Difference]: With dead ends: 43 [2020-11-30 02:04:01,342 INFO L226 Difference]: Without dead ends: 39 [2020-11-30 02:04:01,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:04:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-30 02:04:01,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-11-30 02:04:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 02:04:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-11-30 02:04:01,350 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2020-11-30 02:04:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:01,351 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-11-30 02:04:01,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:04:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-11-30 02:04:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:04:01,352 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:01,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:04:01,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 02:04:01,566 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:01,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1320528433, now seen corresponding path program 1 times [2020-11-30 02:04:01,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:01,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182765686] [2020-11-30 02:04:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:01,583 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:01,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172871777] [2020-11-30 02:04:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:01,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:04:01,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:01,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:01,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182765686] [2020-11-30 02:04:01,716 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:01,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172871777] [2020-11-30 02:04:01,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:04:01,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 02:04:01,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615143306] [2020-11-30 02:04:01,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:04:01,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:01,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:04:01,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:04:01,719 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2020-11-30 02:04:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:01,781 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-11-30 02:04:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:04:01,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-30 02:04:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:01,784 INFO L225 Difference]: With dead ends: 61 [2020-11-30 02:04:01,784 INFO L226 Difference]: Without dead ends: 57 [2020-11-30 02:04:01,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:04:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-30 02:04:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-11-30 02:04:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 02:04:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-30 02:04:01,797 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2020-11-30 02:04:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:01,798 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-30 02:04:01,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:04:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-30 02:04:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:04:01,799 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:01,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:04:02,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:02,012 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:02,013 INFO L82 PathProgramCache]: Analyzing trace with hash 780891877, now seen corresponding path program 1 times [2020-11-30 02:04:02,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:02,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971545889] [2020-11-30 02:04:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:02,032 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:02,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666614959] [2020-11-30 02:04:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:02,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:04:02,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:02,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:02,195 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:04:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:02,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971545889] [2020-11-30 02:04:02,231 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:02,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666614959] [2020-11-30 02:04:02,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:04:02,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 02:04:02,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798678763] [2020-11-30 02:04:02,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:04:02,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:02,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:04:02,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:04:02,233 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-11-30 02:04:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:02,343 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-11-30 02:04:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:04:02,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 02:04:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:02,348 INFO L225 Difference]: With dead ends: 57 [2020-11-30 02:04:02,348 INFO L226 Difference]: Without dead ends: 55 [2020-11-30 02:04:02,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:04:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-30 02:04:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-11-30 02:04:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 02:04:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-11-30 02:04:02,356 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 11 [2020-11-30 02:04:02,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:02,356 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-11-30 02:04:02,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:04:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-11-30 02:04:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 02:04:02,357 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:02,357 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:04:02,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:02,570 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:02,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:02,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1361720655, now seen corresponding path program 1 times [2020-11-30 02:04:02,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:02,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520687692] [2020-11-30 02:04:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:02,585 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:02,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115474589] [2020-11-30 02:04:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:02,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:04:02,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:02,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:02,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520687692] [2020-11-30 02:04:02,723 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:02,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115474589] [2020-11-30 02:04:02,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:04:02,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-30 02:04:02,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706033464] [2020-11-30 02:04:02,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:04:02,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:02,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:04:02,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:04:02,726 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 8 states. [2020-11-30 02:04:02,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:02,799 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2020-11-30 02:04:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:04:02,801 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-30 02:04:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:02,803 INFO L225 Difference]: With dead ends: 111 [2020-11-30 02:04:02,803 INFO L226 Difference]: Without dead ends: 81 [2020-11-30 02:04:02,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:04:02,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-30 02:04:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2020-11-30 02:04:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-30 02:04:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-11-30 02:04:02,820 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 12 [2020-11-30 02:04:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:02,821 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-11-30 02:04:02,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:04:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-11-30 02:04:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:04:02,826 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:02,826 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:04:03,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:03,042 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:03,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1129600833, now seen corresponding path program 1 times [2020-11-30 02:04:03,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:03,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993119261] [2020-11-30 02:04:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:03,055 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:03,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963426371] [2020-11-30 02:04:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:03,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:04:03,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:03,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:03,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993119261] [2020-11-30 02:04:03,194 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:03,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963426371] [2020-11-30 02:04:03,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [129522023] [2020-11-30 02:04:03,214 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 02:04:03,214 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:04:03,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:04:03,223 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:04:03,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:04:03,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:04:04,163 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:04:04,474 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-11-30 02:04:04,926 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-30 02:04:05,966 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 98 [2020-11-30 02:04:06,875 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2020-11-30 02:04:07,809 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 94 [2020-11-30 02:04:08,918 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 94 [2020-11-30 02:04:09,605 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 80 [2020-11-30 02:04:09,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:04:09,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5] total 16 [2020-11-30 02:04:09,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058596087] [2020-11-30 02:04:09,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 02:04:09,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:09,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 02:04:09,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:04:09,613 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 9 states. [2020-11-30 02:04:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:10,015 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2020-11-30 02:04:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:04:10,016 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-11-30 02:04:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:10,017 INFO L225 Difference]: With dead ends: 108 [2020-11-30 02:04:10,017 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 02:04:10,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:04:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 02:04:10,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-11-30 02:04:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-30 02:04:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2020-11-30 02:04:10,030 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 13 [2020-11-30 02:04:10,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:10,030 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2020-11-30 02:04:10,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 02:04:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2020-11-30 02:04:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:04:10,031 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:10,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:04:10,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 02:04:10,246 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:10,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1181995256, now seen corresponding path program 1 times [2020-11-30 02:04:10,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:10,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159242821] [2020-11-30 02:04:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:10,258 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:10,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275295263] [2020-11-30 02:04:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 02:04:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:10,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:10,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159242821] [2020-11-30 02:04:10,384 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:10,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275295263] [2020-11-30 02:04:10,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:04:10,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 02:04:10,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338085375] [2020-11-30 02:04:10,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:04:10,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:10,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:04:10,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:04:10,385 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 5 states. [2020-11-30 02:04:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:10,480 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2020-11-30 02:04:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:04:10,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-30 02:04:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:10,483 INFO L225 Difference]: With dead ends: 79 [2020-11-30 02:04:10,483 INFO L226 Difference]: Without dead ends: 77 [2020-11-30 02:04:10,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:04:10,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-30 02:04:10,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-11-30 02:04:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-30 02:04:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-11-30 02:04:10,511 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 13 [2020-11-30 02:04:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:10,511 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-11-30 02:04:10,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:04:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-11-30 02:04:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:04:10,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:10,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:04:10,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:10,717 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:10,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2025886741, now seen corresponding path program 1 times [2020-11-30 02:04:10,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:10,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037762596] [2020-11-30 02:04:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:10,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:10,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217752413] [2020-11-30 02:04:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:10,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:04:10,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:10,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:10,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037762596] [2020-11-30 02:04:10,902 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:10,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217752413] [2020-11-30 02:04:10,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:04:10,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 02:04:10,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991693398] [2020-11-30 02:04:10,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:04:10,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:10,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:04:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:04:10,904 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 6 states. [2020-11-30 02:04:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:11,071 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2020-11-30 02:04:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 02:04:11,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-30 02:04:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:11,078 INFO L225 Difference]: With dead ends: 113 [2020-11-30 02:04:11,078 INFO L226 Difference]: Without dead ends: 111 [2020-11-30 02:04:11,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:04:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-30 02:04:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2020-11-30 02:04:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-30 02:04:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2020-11-30 02:04:11,096 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 15 [2020-11-30 02:04:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:11,097 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2020-11-30 02:04:11,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:04:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2020-11-30 02:04:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 02:04:11,098 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:11,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:04:11,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:11,326 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:11,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:11,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1256784498, now seen corresponding path program 1 times [2020-11-30 02:04:11,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:11,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350549219] [2020-11-30 02:04:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:11,339 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:11,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711380485] [2020-11-30 02:04:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:04:11,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:11,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:11,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350549219] [2020-11-30 02:04:11,485 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:11,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711380485] [2020-11-30 02:04:11,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:04:11,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 02:04:11,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048435724] [2020-11-30 02:04:11,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:04:11,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:11,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:04:11,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:04:11,487 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 6 states. [2020-11-30 02:04:15,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:15,909 INFO L93 Difference]: Finished difference Result 221 states and 286 transitions. [2020-11-30 02:04:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 02:04:15,910 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-30 02:04:15,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:15,912 INFO L225 Difference]: With dead ends: 221 [2020-11-30 02:04:15,912 INFO L226 Difference]: Without dead ends: 219 [2020-11-30 02:04:15,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-11-30 02:04:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-11-30 02:04:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 140. [2020-11-30 02:04:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-30 02:04:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2020-11-30 02:04:15,954 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 178 transitions. Word has length 17 [2020-11-30 02:04:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:15,954 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 178 transitions. [2020-11-30 02:04:15,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:04:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 178 transitions. [2020-11-30 02:04:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 02:04:15,960 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:15,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:04:16,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-30 02:04:16,186 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:16,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:16,186 INFO L82 PathProgramCache]: Analyzing trace with hash -292141682, now seen corresponding path program 1 times [2020-11-30 02:04:16,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:16,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789048915] [2020-11-30 02:04:16,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:16,201 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:16,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643030019] [2020-11-30 02:04:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:16,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 02:04:16,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:16,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:16,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789048915] [2020-11-30 02:04:16,402 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:16,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643030019] [2020-11-30 02:04:16,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2009863976] [2020-11-30 02:04:16,404 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-11-30 02:04:16,404 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:04:16,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:04:16,405 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:04:16,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:04:16,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:04:17,027 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:04:17,382 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-11-30 02:04:17,835 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-30 02:04:18,953 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 95 [2020-11-30 02:04:20,187 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2020-11-30 02:04:21,478 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 140 DAG size of output: 100 [2020-11-30 02:04:22,695 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 139 DAG size of output: 96 [2020-11-30 02:04:23,571 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 82 [2020-11-30 02:04:24,929 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 144 DAG size of output: 99 [2020-11-30 02:04:26,393 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 147 DAG size of output: 102 [2020-11-30 02:04:28,378 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 160 DAG size of output: 104 [2020-11-30 02:04:28,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:04:28,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4] total 16 [2020-11-30 02:04:28,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886332034] [2020-11-30 02:04:28,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 02:04:28,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:28,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 02:04:28,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:04:28,381 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand 12 states. [2020-11-30 02:04:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:29,128 INFO L93 Difference]: Finished difference Result 248 states and 320 transitions. [2020-11-30 02:04:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:04:29,133 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-11-30 02:04:29,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:29,135 INFO L225 Difference]: With dead ends: 248 [2020-11-30 02:04:29,135 INFO L226 Difference]: Without dead ends: 151 [2020-11-30 02:04:29,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:04:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-11-30 02:04:29,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2020-11-30 02:04:29,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-30 02:04:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2020-11-30 02:04:29,161 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 18 [2020-11-30 02:04:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:29,161 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2020-11-30 02:04:29,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 02:04:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2020-11-30 02:04:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 02:04:29,162 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:29,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:04:29,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:29,382 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:29,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:29,382 INFO L82 PathProgramCache]: Analyzing trace with hash 316167691, now seen corresponding path program 1 times [2020-11-30 02:04:29,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:29,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527354559] [2020-11-30 02:04:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:29,393 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:29,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242691529] [2020-11-30 02:04:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:29,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:04:29,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:29,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:29,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527354559] [2020-11-30 02:04:29,669 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:29,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242691529] [2020-11-30 02:04:29,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344185052] [2020-11-30 02:04:29,674 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2020-11-30 02:04:29,675 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:04:29,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:04:29,676 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:04:29,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:04:29,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:04:30,999 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:04:31,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:04:31,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-30 02:04:31,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100822630] [2020-11-30 02:04:31,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 02:04:31,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:31,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 02:04:31,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:04:31,003 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand 14 states. [2020-11-30 02:04:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:31,380 INFO L93 Difference]: Finished difference Result 619 states and 780 transitions. [2020-11-30 02:04:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 02:04:31,381 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-11-30 02:04:31,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:31,386 INFO L225 Difference]: With dead ends: 619 [2020-11-30 02:04:31,386 INFO L226 Difference]: Without dead ends: 615 [2020-11-30 02:04:31,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-11-30 02:04:31,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-11-30 02:04:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 433. [2020-11-30 02:04:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-11-30 02:04:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 573 transitions. [2020-11-30 02:04:31,455 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 573 transitions. Word has length 27 [2020-11-30 02:04:31,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:31,457 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 573 transitions. [2020-11-30 02:04:31,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 02:04:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 573 transitions. [2020-11-30 02:04:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 02:04:31,460 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:31,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:04:31,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:31,674 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:31,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:31,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1215100099, now seen corresponding path program 1 times [2020-11-30 02:04:31,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:31,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118983554] [2020-11-30 02:04:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:31,684 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:31,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698955124] [2020-11-30 02:04:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:04:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:04:31,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:04:31,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118983554] [2020-11-30 02:04:31,909 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:31,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698955124] [2020-11-30 02:04:31,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1110148800] [2020-11-30 02:04:31,912 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-30 02:04:31,912 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:04:31,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:04:31,913 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:04:31,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:04:32,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:04:32,823 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:04:33,297 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-11-30 02:04:33,529 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-30 02:04:33,794 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-11-30 02:04:35,267 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2020-11-30 02:04:36,720 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 135 DAG size of output: 91 [2020-11-30 02:04:38,033 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2020-11-30 02:04:39,621 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 137 DAG size of output: 95 [2020-11-30 02:04:40,863 WARN L193 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 81 [2020-11-30 02:04:41,158 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-11-30 02:04:41,476 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-11-30 02:04:41,920 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-11-30 02:04:42,463 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-11-30 02:04:43,203 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:04:43,877 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-11-30 02:04:44,511 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-11-30 02:04:45,509 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-11-30 02:04:46,883 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-11-30 02:04:47,259 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-11-30 02:04:47,260 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:47,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:04:47,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-30 02:04:47,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781896894] [2020-11-30 02:04:47,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:04:47,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:47,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:04:47,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-11-30 02:04:47,262 INFO L87 Difference]: Start difference. First operand 433 states and 573 transitions. Second operand 7 states. [2020-11-30 02:04:47,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:04:47,675 INFO L93 Difference]: Finished difference Result 449 states and 594 transitions. [2020-11-30 02:04:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:04:47,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-11-30 02:04:47,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:04:47,679 INFO L225 Difference]: With dead ends: 449 [2020-11-30 02:04:47,679 INFO L226 Difference]: Without dead ends: 447 [2020-11-30 02:04:47,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:04:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-11-30 02:04:47,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 444. [2020-11-30 02:04:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-11-30 02:04:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 581 transitions. [2020-11-30 02:04:47,738 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 581 transitions. Word has length 28 [2020-11-30 02:04:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:04:47,738 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 581 transitions. [2020-11-30 02:04:47,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:04:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 581 transitions. [2020-11-30 02:04:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 02:04:47,740 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:04:47,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:04:47,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-11-30 02:04:47,954 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:04:47,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:04:47,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1210397070, now seen corresponding path program 1 times [2020-11-30 02:04:47,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:04:47,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989786694] [2020-11-30 02:04:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:04:47,962 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:04:47,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547802110] [2020-11-30 02:04:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:04:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:04:48,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-30 02:04:48,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:04:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:48,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:04:48,856 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-11-30 02:04:50,766 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 02:04:51,530 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-11-30 02:04:52,515 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-11-30 02:04:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:04:52,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989786694] [2020-11-30 02:04:52,523 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:04:52,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547802110] [2020-11-30 02:04:52,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354751790] [2020-11-30 02:04:52,527 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2020-11-30 02:04:52,527 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:04:52,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:04:52,528 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:04:52,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:04:52,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:04:54,002 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:04:54,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:04:54,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-11-30 02:04:54,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753233507] [2020-11-30 02:04:54,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 02:04:54,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:04:54,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 02:04:54,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:04:54,004 INFO L87 Difference]: Start difference. First operand 444 states and 581 transitions. Second operand 18 states. [2020-11-30 02:04:55,000 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-11-30 02:04:56,167 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-11-30 02:04:58,606 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 50 [2020-11-30 02:05:06,629 WARN L193 SmtUtils]: Spent 5.16 s on a formula simplification that was a NOOP. DAG size: 53 [2020-11-30 02:05:08,849 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 50 [2020-11-30 02:05:12,693 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 36 [2020-11-30 02:05:15,201 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-11-30 02:05:15,971 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-11-30 02:05:20,865 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-11-30 02:05:21,771 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-11-30 02:05:26,553 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 31 [2020-11-30 02:05:30,712 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 44 [2020-11-30 02:05:37,004 WARN L193 SmtUtils]: Spent 3.32 s on a formula simplification that was a NOOP. DAG size: 46 [2020-11-30 02:05:42,998 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-11-30 02:05:49,938 WARN L193 SmtUtils]: Spent 3.41 s on a formula simplification that was a NOOP. DAG size: 52 [2020-11-30 02:05:52,170 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-11-30 02:06:00,134 WARN L193 SmtUtils]: Spent 6.49 s on a formula simplification that was a NOOP. DAG size: 53 [2020-11-30 02:06:00,758 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 02:06:01,205 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-11-30 02:06:07,360 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 02:06:10,977 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-11-30 02:06:13,578 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-11-30 02:06:16,571 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-30 02:06:20,967 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 52 [2020-11-30 02:06:22,837 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-11-30 02:06:30,032 WARN L193 SmtUtils]: Spent 5.89 s on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-11-30 02:06:32,324 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-11-30 02:06:35,863 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 47 [2020-11-30 02:06:39,471 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-30 02:06:42,541 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 36 [2020-11-30 02:06:49,748 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-11-30 02:06:51,292 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-11-30 02:06:51,802 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-11-30 02:06:53,740 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-30 02:06:59,167 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-11-30 02:07:02,581 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-11-30 02:07:09,089 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-30 02:07:16,469 WARN L193 SmtUtils]: Spent 6.79 s on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-11-30 02:07:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:07:17,712 INFO L93 Difference]: Finished difference Result 992 states and 1274 transitions. [2020-11-30 02:07:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-30 02:07:17,725 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-11-30 02:07:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:07:17,732 INFO L225 Difference]: With dead ends: 992 [2020-11-30 02:07:17,733 INFO L226 Difference]: Without dead ends: 979 [2020-11-30 02:07:17,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 105.0s TimeCoverageRelationStatistics Valid=962, Invalid=4294, Unknown=0, NotChecked=0, Total=5256 [2020-11-30 02:07:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2020-11-30 02:07:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 564. [2020-11-30 02:07:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-11-30 02:07:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 736 transitions. [2020-11-30 02:07:17,853 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 736 transitions. Word has length 28 [2020-11-30 02:07:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:07:17,853 INFO L481 AbstractCegarLoop]: Abstraction has 564 states and 736 transitions. [2020-11-30 02:07:17,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 02:07:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 736 transitions. [2020-11-30 02:07:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-30 02:07:17,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:07:17,855 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:07:18,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:07:18,070 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:07:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:07:18,071 INFO L82 PathProgramCache]: Analyzing trace with hash -519721626, now seen corresponding path program 1 times [2020-11-30 02:07:18,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:07:18,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78435833] [2020-11-30 02:07:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:07:18,079 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:07:18,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019780609] [2020-11-30 02:07:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:07:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:07:18,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:07:18,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:07:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:07:18,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:07:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:07:18,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78435833] [2020-11-30 02:07:18,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:07:18,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019780609] [2020-11-30 02:07:18,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [375912845] [2020-11-30 02:07:18,498 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-30 02:07:18,498 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:07:18,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:07:18,499 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:07:18,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:07:18,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:07:20,171 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-11-30 02:07:20,517 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:07:22,804 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-11-30 02:07:23,545 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-11-30 02:07:24,529 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2020-11-30 02:07:29,993 WARN L193 SmtUtils]: Spent 4.55 s on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2020-11-30 02:07:36,527 WARN L193 SmtUtils]: Spent 5.50 s on a formula simplification. DAG size of input: 139 DAG size of output: 98 [2020-11-30 02:07:44,466 WARN L193 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 142 DAG size of output: 102 [2020-11-30 02:07:51,009 WARN L193 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 141 DAG size of output: 96 [2020-11-30 02:07:56,432 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 142 DAG size of output: 78 [2020-11-30 02:07:57,095 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-11-30 02:07:57,745 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-11-30 02:07:59,438 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-11-30 02:08:01,110 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-11-30 02:08:03,983 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:08:07,298 WARN L193 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-11-30 02:08:09,904 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-11-30 02:08:13,387 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-11-30 02:08:19,912 WARN L193 SmtUtils]: Spent 5.39 s on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-11-30 02:08:20,705 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-11-30 02:08:20,706 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:08:20,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:08:20,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-30 02:08:20,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217039086] [2020-11-30 02:08:20,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:08:20,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:20,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:08:20,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-11-30 02:08:20,708 INFO L87 Difference]: Start difference. First operand 564 states and 736 transitions. Second operand 7 states. [2020-11-30 02:08:22,140 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2020-11-30 02:08:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:23,184 INFO L93 Difference]: Finished difference Result 587 states and 764 transitions. [2020-11-30 02:08:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:08:23,187 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-11-30 02:08:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:23,195 INFO L225 Difference]: With dead ends: 587 [2020-11-30 02:08:23,195 INFO L226 Difference]: Without dead ends: 585 [2020-11-30 02:08:23,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:08:23,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-11-30 02:08:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 566. [2020-11-30 02:08:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-11-30 02:08:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 730 transitions. [2020-11-30 02:08:23,334 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 730 transitions. Word has length 30 [2020-11-30 02:08:23,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:23,334 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 730 transitions. [2020-11-30 02:08:23,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:08:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 730 transitions. [2020-11-30 02:08:23,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-30 02:08:23,337 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:23,337 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:08:23,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2020-11-30 02:08:23,562 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:08:23,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:23,563 INFO L82 PathProgramCache]: Analyzing trace with hash 66020444, now seen corresponding path program 1 times [2020-11-30 02:08:23,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:23,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762158353] [2020-11-30 02:08:23,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:23,580 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:08:23,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524830625] [2020-11-30 02:08:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:08:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:23,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:08:23,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:08:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:23,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:08:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:23,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762158353] [2020-11-30 02:08:23,848 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:08:23,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524830625] [2020-11-30 02:08:23,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433907405] [2020-11-30 02:08:23,850 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-30 02:08:23,852 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:08:23,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:08:23,854 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:08:23,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:08:23,887 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:24,791 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:08:24,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:08:24,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-30 02:08:24,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160565252] [2020-11-30 02:08:24,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 02:08:24,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:24,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 02:08:24,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-11-30 02:08:24,794 INFO L87 Difference]: Start difference. First operand 566 states and 730 transitions. Second operand 12 states. [2020-11-30 02:08:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:25,480 INFO L93 Difference]: Finished difference Result 897 states and 1155 transitions. [2020-11-30 02:08:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 02:08:25,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-11-30 02:08:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:25,493 INFO L225 Difference]: With dead ends: 897 [2020-11-30 02:08:25,494 INFO L226 Difference]: Without dead ends: 585 [2020-11-30 02:08:25,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:08:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-11-30 02:08:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 558. [2020-11-30 02:08:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-11-30 02:08:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 696 transitions. [2020-11-30 02:08:25,631 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 696 transitions. Word has length 31 [2020-11-30 02:08:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:25,632 INFO L481 AbstractCegarLoop]: Abstraction has 558 states and 696 transitions. [2020-11-30 02:08:25,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 02:08:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 696 transitions. [2020-11-30 02:08:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-30 02:08:25,633 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:25,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:08:25,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:08:25,850 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:08:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:25,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1825447148, now seen corresponding path program 1 times [2020-11-30 02:08:25,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:25,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992181423] [2020-11-30 02:08:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:25,873 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:08:25,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016815230] [2020-11-30 02:08:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:08:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:25,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 02:08:25,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:08:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:26,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:08:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-30 02:08:26,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992181423] [2020-11-30 02:08:26,398 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:08:26,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016815230] [2020-11-30 02:08:26,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365197163] [2020-11-30 02:08:26,401 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-30 02:08:26,402 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:08:26,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:08:26,402 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:08:26,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:08:26,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:28,255 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:08:32,568 WARN L193 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2020-11-30 02:08:33,004 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-11-30 02:08:33,538 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-30 02:08:39,647 WARN L193 SmtUtils]: Spent 4.73 s on a formula simplification. DAG size of input: 134 DAG size of output: 92 [2020-11-30 02:08:45,495 WARN L193 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 135 DAG size of output: 91 [2020-11-30 02:08:52,772 WARN L193 SmtUtils]: Spent 5.51 s on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2020-11-30 02:08:58,365 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2020-11-30 02:09:05,387 WARN L193 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 138 DAG size of output: 77 [2020-11-30 02:09:06,130 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-11-30 02:09:06,841 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-11-30 02:09:08,540 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-11-30 02:09:10,588 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-11-30 02:09:15,744 WARN L193 SmtUtils]: Spent 4.74 s on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:09:17,458 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-11-30 02:09:20,537 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-11-30 02:09:25,068 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-11-30 02:09:31,902 WARN L193 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-11-30 02:09:32,763 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-11-30 02:09:32,765 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:09:32,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:09:32,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2020-11-30 02:09:32,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972217225] [2020-11-30 02:09:32,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 02:09:32,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:32,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 02:09:32,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:09:32,767 INFO L87 Difference]: Start difference. First operand 558 states and 696 transitions. Second operand 9 states. [2020-11-30 02:09:33,877 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-11-30 02:09:34,506 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-11-30 02:09:35,581 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-11-30 02:09:38,107 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-11-30 02:09:38,442 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-11-30 02:09:38,657 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-11-30 02:09:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:39,105 INFO L93 Difference]: Finished difference Result 1001 states and 1271 transitions. [2020-11-30 02:09:39,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-30 02:09:39,108 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-11-30 02:09:39,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:39,115 INFO L225 Difference]: With dead ends: 1001 [2020-11-30 02:09:39,116 INFO L226 Difference]: Without dead ends: 995 [2020-11-30 02:09:39,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 67.7s TimeCoverageRelationStatistics Valid=558, Invalid=2748, Unknown=0, NotChecked=0, Total=3306 [2020-11-30 02:09:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2020-11-30 02:09:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 571. [2020-11-30 02:09:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-30 02:09:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 722 transitions. [2020-11-30 02:09:39,254 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 722 transitions. Word has length 34 [2020-11-30 02:09:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:39,255 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 722 transitions. [2020-11-30 02:09:39,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 02:09:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 722 transitions. [2020-11-30 02:09:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-30 02:09:39,256 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:39,256 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:39,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:09:39,482 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:09:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:39,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1990446240, now seen corresponding path program 1 times [2020-11-30 02:09:39,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:39,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151903148] [2020-11-30 02:09:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:39,489 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:09:39,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151843178] [2020-11-30 02:09:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:09:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 02:09:39,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:09:39,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:09:39,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151903148] [2020-11-30 02:09:39,637 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:09:39,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151843178] [2020-11-30 02:09:39,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:39,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2020-11-30 02:09:39,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416470944] [2020-11-30 02:09:39,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:09:39,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:39,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:09:39,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:09:39,639 INFO L87 Difference]: Start difference. First operand 571 states and 722 transitions. Second operand 6 states. [2020-11-30 02:09:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:40,440 INFO L93 Difference]: Finished difference Result 1024 states and 1305 transitions. [2020-11-30 02:09:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:09:40,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-11-30 02:09:40,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:40,447 INFO L225 Difference]: With dead ends: 1024 [2020-11-30 02:09:40,447 INFO L226 Difference]: Without dead ends: 710 [2020-11-30 02:09:40,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:09:40,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-11-30 02:09:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 668. [2020-11-30 02:09:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2020-11-30 02:09:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 835 transitions. [2020-11-30 02:09:40,589 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 835 transitions. Word has length 36 [2020-11-30 02:09:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:40,589 INFO L481 AbstractCegarLoop]: Abstraction has 668 states and 835 transitions. [2020-11-30 02:09:40,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:09:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 835 transitions. [2020-11-30 02:09:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-30 02:09:40,591 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:40,591 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:40,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:09:40,801 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:09:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1532793425, now seen corresponding path program 1 times [2020-11-30 02:09:40,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:40,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451389051] [2020-11-30 02:09:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:40,810 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:09:40,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008673574] [2020-11-30 02:09:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:09:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:09:40,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:41,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:41,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451389051] [2020-11-30 02:09:41,251 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:09:41,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008673574] [2020-11-30 02:09:41,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1975315934] [2020-11-30 02:09:41,254 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2020-11-30 02:09:41,254 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:09:41,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:09:41,255 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:09:41,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:09:41,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:43,361 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:09:43,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:09:43,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-30 02:09:43,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514409181] [2020-11-30 02:09:43,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 02:09:43,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:43,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 02:09:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:09:43,364 INFO L87 Difference]: Start difference. First operand 668 states and 835 transitions. Second operand 16 states. [2020-11-30 02:09:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:44,622 INFO L93 Difference]: Finished difference Result 1671 states and 2118 transitions. [2020-11-30 02:09:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-30 02:09:44,623 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-11-30 02:09:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:44,631 INFO L225 Difference]: With dead ends: 1671 [2020-11-30 02:09:44,631 INFO L226 Difference]: Without dead ends: 1376 [2020-11-30 02:09:44,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2020-11-30 02:09:44,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2020-11-30 02:09:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1226. [2020-11-30 02:09:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2020-11-30 02:09:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1510 transitions. [2020-11-30 02:09:44,942 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1510 transitions. Word has length 38 [2020-11-30 02:09:44,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:44,943 INFO L481 AbstractCegarLoop]: Abstraction has 1226 states and 1510 transitions. [2020-11-30 02:09:44,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 02:09:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1510 transitions. [2020-11-30 02:09:44,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-30 02:09:44,944 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:44,944 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:45,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-11-30 02:09:45,178 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:09:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1084763321, now seen corresponding path program 1 times [2020-11-30 02:09:45,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:45,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214980287] [2020-11-30 02:09:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:45,197 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:09:45,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392754309] [2020-11-30 02:09:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:09:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:45,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-30 02:09:45,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:45,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:49,198 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 11 [2020-11-30 02:09:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:49,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214980287] [2020-11-30 02:09:49,853 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:09:49,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392754309] [2020-11-30 02:09:49,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2147145148] [2020-11-30 02:09:49,856 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2020-11-30 02:09:49,857 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:09:49,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:09:49,858 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:09:49,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:09:50,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:51,999 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:09:51,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:09:51,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-11-30 02:09:52,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992855933] [2020-11-30 02:09:52,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 02:09:52,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:52,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 02:09:52,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-30 02:09:52,001 INFO L87 Difference]: Start difference. First operand 1226 states and 1510 transitions. Second operand 15 states. [2020-11-30 02:09:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:52,013 INFO L93 Difference]: Finished difference Result 1226 states and 1510 transitions. [2020-11-30 02:09:52,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:09:52,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-11-30 02:09:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:52,014 INFO L225 Difference]: With dead ends: 1226 [2020-11-30 02:09:52,014 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:09:52,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-30 02:09:52,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:09:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:09:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:09:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:09:52,018 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-11-30 02:09:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:52,018 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:09:52,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 02:09:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:09:52,019 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:09:52,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2020-11-30 02:09:52,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 02:09:52,284 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 02:09:52,284 INFO L274 CegarLoopResult]: For program point L11(lines 11 14) no Hoare annotation was computed. [2020-11-30 02:09:52,284 INFO L270 CegarLoopResult]: At program point L11-1(lines 10 16) the Hoare annotation is: false [2020-11-30 02:09:52,284 INFO L274 CegarLoopResult]: For program point L11-2(lines 11 14) no Hoare annotation was computed. [2020-11-30 02:09:52,284 INFO L270 CegarLoopResult]: At program point L11-3(lines 10 16) the Hoare annotation is: false [2020-11-30 02:09:52,285 INFO L274 CegarLoopResult]: For program point L11-4(lines 11 14) no Hoare annotation was computed. [2020-11-30 02:09:52,285 INFO L270 CegarLoopResult]: At program point L11-5(lines 10 16) the Hoare annotation is: false [2020-11-30 02:09:52,285 INFO L274 CegarLoopResult]: For program point L11-6(lines 11 14) no Hoare annotation was computed. [2020-11-30 02:09:52,285 INFO L270 CegarLoopResult]: At program point L11-7(lines 54 55) the Hoare annotation is: false [2020-11-30 02:09:52,285 INFO L274 CegarLoopResult]: For program point L11-8(lines 11 14) no Hoare annotation was computed. [2020-11-30 02:09:52,285 INFO L277 CegarLoopResult]: At program point L11-9(lines 10 16) the Hoare annotation is: true [2020-11-30 02:09:52,285 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 02:09:52,285 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 02:09:52,285 INFO L274 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2020-11-30 02:09:52,285 INFO L274 CegarLoopResult]: For program point L12-1(lines 12 13) no Hoare annotation was computed. [2020-11-30 02:09:52,285 INFO L274 CegarLoopResult]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2020-11-30 02:09:52,285 INFO L274 CegarLoopResult]: For program point L12-3(lines 12 13) no Hoare annotation was computed. [2020-11-30 02:09:52,285 INFO L274 CegarLoopResult]: For program point L12-4(lines 12 13) no Hoare annotation was computed. [2020-11-30 02:09:52,286 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 02:09:52,286 INFO L274 CegarLoopResult]: For program point L48-1(lines 48 58) no Hoare annotation was computed. [2020-11-30 02:09:52,286 INFO L270 CegarLoopResult]: At program point L48-3(lines 48 58) the Hoare annotation is: false [2020-11-30 02:09:52,286 INFO L274 CegarLoopResult]: For program point L48-4(lines 48 58) no Hoare annotation was computed. [2020-11-30 02:09:52,286 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 02:09:52,286 INFO L274 CegarLoopResult]: For program point L41-1(lines 41 61) no Hoare annotation was computed. [2020-11-30 02:09:52,286 INFO L270 CegarLoopResult]: At program point L41-3(lines 41 61) the Hoare annotation is: false [2020-11-30 02:09:52,286 INFO L274 CegarLoopResult]: For program point L41-4(lines 41 61) no Hoare annotation was computed. [2020-11-30 02:09:52,286 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 02:09:52,286 INFO L274 CegarLoopResult]: For program point L42(lines 42 43) no Hoare annotation was computed. [2020-11-30 02:09:52,287 INFO L274 CegarLoopResult]: For program point L34-1(lines 34 72) no Hoare annotation was computed. [2020-11-30 02:09:52,287 INFO L270 CegarLoopResult]: At program point L34-3(lines 34 72) the Hoare annotation is: false [2020-11-30 02:09:52,287 INFO L274 CegarLoopResult]: For program point L34-4(lines 34 72) no Hoare annotation was computed. [2020-11-30 02:09:52,287 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 02:09:52,287 INFO L274 CegarLoopResult]: For program point L35(lines 35 36) no Hoare annotation was computed. [2020-11-30 02:09:52,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:09:52 BoogieIcfgContainer [2020-11-30 02:09:52,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:09:52,298 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:09:52,298 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:09:52,299 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:09:52,299 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:04:00" (3/4) ... [2020-11-30 02:09:52,302 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:09:52,316 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-30 02:09:52,317 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-30 02:09:52,317 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:09:52,318 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 02:09:52,382 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a8a02438-7c5d-41c6-bae7-3ed90eb79703/bin/utaipan/witness.graphml [2020-11-30 02:09:52,382 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:09:52,383 INFO L168 Benchmark]: Toolchain (without parser) took 353066.55 ms. Allocated memory was 94.4 MB in the beginning and 201.3 MB in the end (delta: 107.0 MB). Free memory was 66.0 MB in the beginning and 49.4 MB in the end (delta: 16.6 MB). Peak memory consumption was 122.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:52,384 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 50.9 MB in the beginning and 50.9 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:09:52,384 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.56 ms. Allocated memory is still 94.4 MB. Free memory was 65.8 MB in the beginning and 71.9 MB in the end (delta: -6.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:52,385 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.61 ms. Allocated memory is still 94.4 MB. Free memory was 71.9 MB in the beginning and 70.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:52,385 INFO L168 Benchmark]: Boogie Preprocessor took 37.60 ms. Allocated memory is still 94.4 MB. Free memory was 70.2 MB in the beginning and 68.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:52,386 INFO L168 Benchmark]: RCFGBuilder took 845.95 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 45.0 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:52,386 INFO L168 Benchmark]: TraceAbstraction took 351673.29 ms. Allocated memory was 94.4 MB in the beginning and 201.3 MB in the end (delta: 107.0 MB). Free memory was 44.7 MB in the beginning and 52.5 MB in the end (delta: -7.9 MB). Peak memory consumption was 101.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:52,387 INFO L168 Benchmark]: Witness Printer took 84.29 ms. Allocated memory is still 201.3 MB. Free memory was 52.5 MB in the beginning and 49.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:52,390 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 50.9 MB in the beginning and 50.9 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.56 ms. Allocated memory is still 94.4 MB. Free memory was 65.8 MB in the beginning and 71.9 MB in the end (delta: -6.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.61 ms. Allocated memory is still 94.4 MB. Free memory was 71.9 MB in the beginning and 70.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.60 ms. Allocated memory is still 94.4 MB. Free memory was 70.2 MB in the beginning and 68.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 845.95 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 45.0 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 351673.29 ms. Allocated memory was 94.4 MB in the beginning and 201.3 MB in the end (delta: 107.0 MB). Free memory was 44.7 MB in the beginning and 52.5 MB in the end (delta: -7.9 MB). Peak memory consumption was 101.6 MB. Max. memory is 16.1 GB. * Witness Printer took 84.29 ms. Allocated memory is still 201.3 MB. Free memory was 52.5 MB in the beginning and 49.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 54]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 351.5s, OverallIterations: 19, TraceHistogramMax: 4, AutomataDifference: 162.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 626 SDtfs, 2086 SDslu, 2758 SDs, 0 SdLazy, 1759 SolverSat, 457 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 51.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1039 GetRequests, 710 SyntacticMatches, 11 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 272.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1226occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 1424 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 8 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 11.6s InterpolantComputationTime, 408 NumberOfCodeBlocks, 408 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 774 ConstructedInterpolants, 0 QuantifiedInterpolants, 129901 SizeOfPredicates, 138 NumberOfNonLiveVariables, 2247 ConjunctsInSsa, 257 ConjunctsInUnsatCore, 37 InterpolantComputations, 17 PerfectInterpolantSequences, 155/296 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: OVERALL_TIME[ms]: 1573, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 24, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 51, TOOLS_POST_TIME[ms]: 500, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 51, TOOLS_QUANTIFIERELIM_TIME[ms]: 472, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 211, FLUID_QUERY_TIME[ms]: 6, FLUID_QUERIES: 82, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 5, DOMAIN_JOIN_TIME[ms]: 498, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 294, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 28, DOMAIN_ISBOTTOM_APPLICATIONS: 24, DOMAIN_ISBOTTOM_TIME[ms]: 178, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 419, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 418, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 26, DAG_COMPRESSION_PROCESSED_NODES: 277, DAG_COMPRESSION_RETAINED_NODES: 78, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...