./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.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_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 da2855a3b9d79ea31d743c942a3327e8ed25edbd ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:44:50,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:44:50,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:44:50,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:44:50,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:44:50,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:44:50,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:44:50,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:44:50,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:44:50,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:44:50,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:44:50,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:44:50,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:44:50,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:44:50,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:44:50,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:44:50,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:44:50,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:44:50,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:44:50,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:44:50,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:44:50,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:44:50,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:44:50,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:44:50,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:44:50,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:44:50,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:44:50,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:44:50,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:44:50,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:44:50,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:44:50,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:44:50,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:44:50,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:44:50,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:44:50,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:44:50,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:44:50,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:44:50,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:44:50,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:44:50,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:44:50,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 01:44:50,723 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:44:50,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:44:50,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:44:50,725 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:44:50,725 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:44:50,725 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:44:50,726 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:44:50,726 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:44:50,726 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:44:50,727 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:44:50,727 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:44:50,727 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:44:50,727 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:44:50,728 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:44:50,728 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:44:50,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:44:50,729 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:44:50,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:44:50,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:44:50,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:44:50,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:44:50,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:44:50,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:44:50,731 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:44:50,731 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:44:50,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:44:50,732 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:44:50,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:44:50,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:44:50,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:44:50,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:44:50,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:44:50,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:44:50,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:44:50,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:44:50,734 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:44:50,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:44:50,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:44:50,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:44:50,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:44:50,736 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_95946a5f-4c98-486a-976c-9c919b6be66c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da2855a3b9d79ea31d743c942a3327e8ed25edbd [2020-11-30 01:44:50,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:44:50,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:44:50,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:44:50,993 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:44:50,994 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:44:50,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2020-11-30 01:44:51,090 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan/data/407c3e8be/ab4ff3315e8140e08464e2eba987a458/FLAG21f297c0d [2020-11-30 01:44:51,571 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:44:51,571 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2020-11-30 01:44:51,578 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan/data/407c3e8be/ab4ff3315e8140e08464e2eba987a458/FLAG21f297c0d [2020-11-30 01:44:51,959 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan/data/407c3e8be/ab4ff3315e8140e08464e2eba987a458 [2020-11-30 01:44:51,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:44:51,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:44:51,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:44:51,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:44:51,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:44:51,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:44:51" (1/1) ... [2020-11-30 01:44:51,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@240cfd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:51, skipping insertion in model container [2020-11-30 01:44:51,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:44:51" (1/1) ... [2020-11-30 01:44:51,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:44:52,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:44:52,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:44:52,249 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:44:52,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:44:52,297 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:44:52,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52 WrapperNode [2020-11-30 01:44:52,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:44:52,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:44:52,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:44:52,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:44:52,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52" (1/1) ... [2020-11-30 01:44:52,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52" (1/1) ... [2020-11-30 01:44:52,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:44:52,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:44:52,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:44:52,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:44:52,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52" (1/1) ... [2020-11-30 01:44:52,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52" (1/1) ... [2020-11-30 01:44:52,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52" (1/1) ... [2020-11-30 01:44:52,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52" (1/1) ... [2020-11-30 01:44:52,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52" (1/1) ... [2020-11-30 01:44:52,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52" (1/1) ... [2020-11-30 01:44:52,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52" (1/1) ... [2020-11-30 01:44:52,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:44:52,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:44:52,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:44:52,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:44:52,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:44:52,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:44:52,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:44:52,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:44:52,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:44:53,025 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:44:53,026 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-11-30 01:44:53,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:44:53 BoogieIcfgContainer [2020-11-30 01:44:53,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:44:53,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:44:53,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:44:53,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:44:53,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:44:51" (1/3) ... [2020-11-30 01:44:53,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbafb62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:44:53, skipping insertion in model container [2020-11-30 01:44:53,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:44:52" (2/3) ... [2020-11-30 01:44:53,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbafb62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:44:53, skipping insertion in model container [2020-11-30 01:44:53,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:44:53" (3/3) ... [2020-11-30 01:44:53,036 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2020-11-30 01:44:53,048 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:44:53,053 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-11-30 01:44:53,063 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-11-30 01:44:53,087 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:44:53,088 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:44:53,089 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:44:53,089 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:44:53,089 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:44:53,089 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:44:53,089 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:44:53,090 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:44:53,104 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-30 01:44:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:44:53,109 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:44:53,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:44:53,111 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 01:44:53,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:44:53,116 INFO L82 PathProgramCache]: Analyzing trace with hash 165250771, now seen corresponding path program 1 times [2020-11-30 01:44:53,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:44:53,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245584398] [2020-11-30 01:44:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:44:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:44:53,246 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 01:44:53,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245584398] [2020-11-30 01:44:53,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:44:53,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:44:53,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161570876] [2020-11-30 01:44:53,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:44:53,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:44:53,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:44:53,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:44:53,269 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-30 01:44:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:44:53,286 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2020-11-30 01:44:53,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:44:53,288 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-30 01:44:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:44:53,296 INFO L225 Difference]: With dead ends: 65 [2020-11-30 01:44:53,296 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 01:44:53,299 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 01:44:53,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 01:44:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-30 01:44:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 01:44:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-11-30 01:44:53,332 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 5 [2020-11-30 01:44:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:44:53,333 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-11-30 01:44:53,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:44:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-11-30 01:44:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:44:53,334 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:44:53,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:44:53,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:44:53,335 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 01:44:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:44:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash 735362312, now seen corresponding path program 1 times [2020-11-30 01:44:53,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:44:53,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350451606] [2020-11-30 01:44:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:44:53,358 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:44:53,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368201209] [2020-11-30 01:44:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:44:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:44:53,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:44:53,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:44:53,557 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 01:44:53,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:44:53,583 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 01:44:53,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350451606] [2020-11-30 01:44:53,584 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:44:53,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368201209] [2020-11-30 01:44:53,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:44:53,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 01:44:53,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236069266] [2020-11-30 01:44:53,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:44:53,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:44:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:44:53,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:44:53,587 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2020-11-30 01:44:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:44:53,631 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-11-30 01:44:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:44:53,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-30 01:44:53,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:44:53,639 INFO L225 Difference]: With dead ends: 43 [2020-11-30 01:44:53,639 INFO L226 Difference]: Without dead ends: 39 [2020-11-30 01:44:53,641 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 01:44:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-30 01:44:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-11-30 01:44:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 01:44:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-11-30 01:44:53,653 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2020-11-30 01:44:53,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:44:53,654 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-11-30 01:44:53,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:44:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-11-30 01:44:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:44:53,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:44:53,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:44:53,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 01:44:53,879 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 01:44:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:44:53,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1320528433, now seen corresponding path program 1 times [2020-11-30 01:44:53,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:44:53,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865215014] [2020-11-30 01:44:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:44:53,896 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:44:53,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180993608] [2020-11-30 01:44:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:44:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:44:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:44:53,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:44:53,983 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 01:44:53,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:44:53,987 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 01:44:53,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865215014] [2020-11-30 01:44:53,987 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:44:53,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180993608] [2020-11-30 01:44:53,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:44:53,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 01:44:53,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859227751] [2020-11-30 01:44:53,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:44:53,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:44:53,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:44:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:44:53,990 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2020-11-30 01:44:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:44:54,038 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-11-30 01:44:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:44:54,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-30 01:44:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:44:54,039 INFO L225 Difference]: With dead ends: 61 [2020-11-30 01:44:54,040 INFO L226 Difference]: Without dead ends: 57 [2020-11-30 01:44:54,040 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 01:44:54,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-30 01:44:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-11-30 01:44:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 01:44:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-30 01:44:54,046 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2020-11-30 01:44:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:44:54,046 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-30 01:44:54,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:44:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-30 01:44:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:44:54,048 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:44:54,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:44:54,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:44:54,248 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 01:44:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:44:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash 780891877, now seen corresponding path program 1 times [2020-11-30 01:44:54,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:44:54,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415864286] [2020-11-30 01:44:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:44:54,275 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:44:54,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992709209] [2020-11-30 01:44:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:44:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:44:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 01:44:54,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:44:54,386 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 01:44:54,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:44:54,400 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 01:44:54,414 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 01:44:54,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415864286] [2020-11-30 01:44:54,415 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:44:54,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992709209] [2020-11-30 01:44:54,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:44:54,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 01:44:54,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578504855] [2020-11-30 01:44:54,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:44:54,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:44:54,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:44:54,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:44:54,417 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-11-30 01:44:54,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:44:54,515 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-11-30 01:44:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:44:54,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 01:44:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:44:54,517 INFO L225 Difference]: With dead ends: 57 [2020-11-30 01:44:54,517 INFO L226 Difference]: Without dead ends: 55 [2020-11-30 01:44:54,518 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 01:44:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-30 01:44:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-11-30 01:44:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 01:44:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-11-30 01:44:54,525 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 11 [2020-11-30 01:44:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:44:54,525 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-11-30 01:44:54,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:44:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-11-30 01:44:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:44:54,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:44:54,526 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:44:54,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:44:54,728 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 01:44:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:44:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1361720655, now seen corresponding path program 1 times [2020-11-30 01:44:54,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:44:54,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858941381] [2020-11-30 01:44:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:44:54,745 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:44:54,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790988800] [2020-11-30 01:44:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:44:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:44:54,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:44:54,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:44:54,855 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 01:44:54,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:44:54,887 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 01:44:54,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858941381] [2020-11-30 01:44:54,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:44:54,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790988800] [2020-11-30 01:44:54,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:44:54,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-30 01:44:54,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247279505] [2020-11-30 01:44:54,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:44:54,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:44:54,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:44:54,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:44:54,890 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 8 states. [2020-11-30 01:44:54,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:44:54,967 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2020-11-30 01:44:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:44:54,969 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-30 01:44:54,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:44:54,971 INFO L225 Difference]: With dead ends: 111 [2020-11-30 01:44:54,971 INFO L226 Difference]: Without dead ends: 81 [2020-11-30 01:44:54,972 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 01:44:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-30 01:44:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2020-11-30 01:44:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-30 01:44:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-11-30 01:44:54,988 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 12 [2020-11-30 01:44:54,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:44:54,989 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-11-30 01:44:54,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:44:54,993 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-11-30 01:44:54,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 01:44:54,994 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:44:54,994 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:44:55,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:44:55,195 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 01:44:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:44:55,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1129600833, now seen corresponding path program 1 times [2020-11-30 01:44:55,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:44:55,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265550153] [2020-11-30 01:44:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:44:55,208 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:44:55,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886471198] [2020-11-30 01:44:55,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:44:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:44:55,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:44:55,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:44:55,308 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 01:44:55,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:44:55,358 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 01:44:55,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265550153] [2020-11-30 01:44:55,358 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:44:55,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886471198] [2020-11-30 01:44:55,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364410683] [2020-11-30 01:44:55,378 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 01:44:55,378 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:44:55,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:44:55,388 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:44:55,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:44:55,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:44:56,425 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:44:56,697 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-11-30 01:44:57,067 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-30 01:44:58,002 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 95 [2020-11-30 01:44:59,060 WARN L193 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 98 [2020-11-30 01:45:00,110 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 94 [2020-11-30 01:45:00,971 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 91 [2020-11-30 01:45:01,453 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 77 [2020-11-30 01:45:01,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:45:01,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5] total 15 [2020-11-30 01:45:01,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191612678] [2020-11-30 01:45:01,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:45:01,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:45:01,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:45:01,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:45:01,458 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 9 states. [2020-11-30 01:45:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:45:02,081 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2020-11-30 01:45:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:45:02,083 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-11-30 01:45:02,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:45:02,084 INFO L225 Difference]: With dead ends: 108 [2020-11-30 01:45:02,084 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 01:45:02,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:45:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 01:45:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-11-30 01:45:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-30 01:45:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2020-11-30 01:45:02,095 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 13 [2020-11-30 01:45:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:45:02,095 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2020-11-30 01:45:02,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:45:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2020-11-30 01:45:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 01:45:02,096 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:45:02,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:45:02,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 01:45:02,311 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 01:45:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:45:02,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1181995256, now seen corresponding path program 1 times [2020-11-30 01:45:02,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:45:02,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239324754] [2020-11-30 01:45:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:45:02,324 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:45:02,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102978196] [2020-11-30 01:45:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:45:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:45:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:45:02,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:45:02,427 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 01:45:02,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:45:02,455 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 01:45:02,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239324754] [2020-11-30 01:45:02,455 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:45:02,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102978196] [2020-11-30 01:45:02,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:45:02,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 01:45:02,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369311982] [2020-11-30 01:45:02,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:45:02,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:45:02,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:45:02,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:45:02,457 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 5 states. [2020-11-30 01:45:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:45:02,567 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2020-11-30 01:45:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:45:02,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-30 01:45:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:45:02,569 INFO L225 Difference]: With dead ends: 79 [2020-11-30 01:45:02,569 INFO L226 Difference]: Without dead ends: 77 [2020-11-30 01:45:02,569 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 01:45:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-30 01:45:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-11-30 01:45:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-30 01:45:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-11-30 01:45:02,580 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 13 [2020-11-30 01:45:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:45:02,580 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-11-30 01:45:02,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:45:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-11-30 01:45:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:45:02,581 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:45:02,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:45:02,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:45:02,802 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 01:45:02,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:45:02,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2025886741, now seen corresponding path program 1 times [2020-11-30 01:45:02,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:45:02,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93294692] [2020-11-30 01:45:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:45:02,827 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:45:02,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284769774] [2020-11-30 01:45:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:45:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:45:02,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 01:45:02,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:45:02,939 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 01:45:02,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:45:02,977 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 01:45:02,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93294692] [2020-11-30 01:45:02,977 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:45:02,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284769774] [2020-11-30 01:45:02,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:45:02,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 01:45:02,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226995441] [2020-11-30 01:45:02,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:45:02,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:45:02,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:45:02,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:45:02,979 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 6 states. [2020-11-30 01:45:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:45:03,153 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2020-11-30 01:45:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:45:03,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-30 01:45:03,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:45:03,155 INFO L225 Difference]: With dead ends: 113 [2020-11-30 01:45:03,155 INFO L226 Difference]: Without dead ends: 111 [2020-11-30 01:45:03,156 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 01:45:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-30 01:45:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2020-11-30 01:45:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-30 01:45:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2020-11-30 01:45:03,170 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 15 [2020-11-30 01:45:03,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:45:03,170 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2020-11-30 01:45:03,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:45:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2020-11-30 01:45:03,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:45:03,172 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:45:03,172 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 01:45:03,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:45:03,399 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 01:45:03,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:45:03,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1256784498, now seen corresponding path program 1 times [2020-11-30 01:45:03,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:45:03,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138869369] [2020-11-30 01:45:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:45:03,409 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:45:03,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224187998] [2020-11-30 01:45:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:45:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:45:03,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 01:45:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:45:03,520 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 01:45:03,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:45:03,544 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 01:45:03,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138869369] [2020-11-30 01:45:03,544 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:45:03,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224187998] [2020-11-30 01:45:03,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:45:03,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 01:45:03,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922573842] [2020-11-30 01:45:03,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:45:03,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:45:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:45:03,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:45:03,546 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 6 states. [2020-11-30 01:45:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:45:07,991 INFO L93 Difference]: Finished difference Result 221 states and 286 transitions. [2020-11-30 01:45:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:45:07,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-30 01:45:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:45:07,996 INFO L225 Difference]: With dead ends: 221 [2020-11-30 01:45:07,996 INFO L226 Difference]: Without dead ends: 219 [2020-11-30 01:45:07,997 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 01:45:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-11-30 01:45:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 140. [2020-11-30 01:45:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-30 01:45:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2020-11-30 01:45:08,017 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 178 transitions. Word has length 17 [2020-11-30 01:45:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:45:08,017 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 178 transitions. [2020-11-30 01:45:08,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:45:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 178 transitions. [2020-11-30 01:45:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:45:08,018 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:45:08,018 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:45:08,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-30 01:45:08,235 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 01:45:08,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:45:08,235 INFO L82 PathProgramCache]: Analyzing trace with hash -292141682, now seen corresponding path program 1 times [2020-11-30 01:45:08,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:45:08,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075375574] [2020-11-30 01:45:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:45:08,249 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:45:08,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817851020] [2020-11-30 01:45:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:45:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:45:08,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 01:45:08,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:45:08,379 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 01:45:08,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:45:08,424 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 01:45:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075375574] [2020-11-30 01:45:08,424 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:45:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817851020] [2020-11-30 01:45:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984509218] [2020-11-30 01:45:08,427 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-11-30 01:45:08,427 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:45:08,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:45:08,427 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:45:08,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:45:08,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:45:09,065 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:45:09,369 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-30 01:45:09,793 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-30 01:45:10,874 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 95 [2020-11-30 01:45:11,792 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2020-11-30 01:45:12,976 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 140 DAG size of output: 99 [2020-11-30 01:45:14,011 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 94 [2020-11-30 01:45:15,005 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 80 [2020-11-30 01:45:16,170 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 97 [2020-11-30 01:45:17,575 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 147 DAG size of output: 102 [2020-11-30 01:45:19,647 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 160 DAG size of output: 103 [2020-11-30 01:45:19,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:45:19,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4] total 16 [2020-11-30 01:45:19,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553050615] [2020-11-30 01:45:19,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:45:19,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:45:19,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:45:19,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:45:19,650 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand 12 states. [2020-11-30 01:45:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:45:20,788 INFO L93 Difference]: Finished difference Result 248 states and 320 transitions. [2020-11-30 01:45:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:45:20,796 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-11-30 01:45:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:45:20,797 INFO L225 Difference]: With dead ends: 248 [2020-11-30 01:45:20,797 INFO L226 Difference]: Without dead ends: 151 [2020-11-30 01:45:20,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:45:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-11-30 01:45:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2020-11-30 01:45:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-30 01:45:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2020-11-30 01:45:20,819 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 18 [2020-11-30 01:45:20,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:45:20,819 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2020-11-30 01:45:20,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:45:20,820 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2020-11-30 01:45:20,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 01:45:20,821 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:45:20,821 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 01:45:21,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:45:21,039 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 01:45:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:45:21,040 INFO L82 PathProgramCache]: Analyzing trace with hash 316167691, now seen corresponding path program 1 times [2020-11-30 01:45:21,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:45:21,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283240366] [2020-11-30 01:45:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:45:21,049 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:45:21,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999643452] [2020-11-30 01:45:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:45:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:45:21,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:45:21,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:45:21,180 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 01:45:21,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:45:21,200 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 01:45:21,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283240366] [2020-11-30 01:45:21,200 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:45:21,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999643452] [2020-11-30 01:45:21,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1258591886] [2020-11-30 01:45:21,204 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2020-11-30 01:45:21,204 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:45:21,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:45:21,204 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:45:21,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:45:21,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:45:21,768 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 245 [2020-11-30 01:45:22,171 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 01:45:22,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:45:22,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-30 01:45:22,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294460203] [2020-11-30 01:45:22,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:45:22,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:45:22,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:45:22,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:45:22,174 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand 8 states. [2020-11-30 01:45:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:45:22,298 INFO L93 Difference]: Finished difference Result 169 states and 209 transitions. [2020-11-30 01:45:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:45:22,298 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-11-30 01:45:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:45:22,300 INFO L225 Difference]: With dead ends: 169 [2020-11-30 01:45:22,300 INFO L226 Difference]: Without dead ends: 165 [2020-11-30 01:45:22,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:45:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-11-30 01:45:22,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2020-11-30 01:45:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-11-30 01:45:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 187 transitions. [2020-11-30 01:45:22,334 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 187 transitions. Word has length 27 [2020-11-30 01:45:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:45:22,336 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 187 transitions. [2020-11-30 01:45:22,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:45:22,336 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 187 transitions. [2020-11-30 01:45:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 01:45:22,341 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:45:22,341 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 01:45:22,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:45:22,567 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 01:45:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:45:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1215100099, now seen corresponding path program 1 times [2020-11-30 01:45:22,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:45:22,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537326063] [2020-11-30 01:45:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:45:22,585 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:45:22,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096624202] [2020-11-30 01:45:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:45:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:45:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 01:45:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:45:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:45:22,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:45:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:45:22,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537326063] [2020-11-30 01:45:22,734 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:45:22,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096624202] [2020-11-30 01:45:22,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313538330] [2020-11-30 01:45:22,742 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-30 01:45:22,743 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:45:22,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:45:22,744 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:45:22,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:45:22,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:45:23,624 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:45:24,161 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-11-30 01:45:24,440 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-30 01:45:24,780 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-30 01:45:26,386 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 137 DAG size of output: 102 [2020-11-30 01:45:27,708 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 135 DAG size of output: 91 [2020-11-30 01:45:29,155 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2020-11-30 01:45:30,267 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2020-11-30 01:45:31,225 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 77 [2020-11-30 01:45:31,522 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-11-30 01:45:31,830 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-11-30 01:45:32,409 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-11-30 01:45:32,964 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-11-30 01:45:33,615 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 01:45:34,186 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-11-30 01:45:34,907 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-11-30 01:45:35,819 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-11-30 01:45:36,802 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-11-30 01:45:37,166 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-11-30 01:45:37,167 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:45:37,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:45:37,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-30 01:45:37,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846853442] [2020-11-30 01:45:37,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:45:37,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:45:37,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:45:37,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-11-30 01:45:37,169 INFO L87 Difference]: Start difference. First operand 149 states and 187 transitions. Second operand 9 states. [2020-11-30 01:45:37,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:45:37,336 INFO L93 Difference]: Finished difference Result 226 states and 284 transitions. [2020-11-30 01:45:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:45:37,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-11-30 01:45:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:45:37,339 INFO L225 Difference]: With dead ends: 226 [2020-11-30 01:45:37,339 INFO L226 Difference]: Without dead ends: 108 [2020-11-30 01:45:37,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2020-11-30 01:45:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-30 01:45:37,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2020-11-30 01:45:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-30 01:45:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-11-30 01:45:37,355 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-11-30 01:45:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:45:37,355 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-11-30 01:45:37,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:45:37,356 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-11-30 01:45:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 01:45:37,358 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:45:37,358 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 01:45:37,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-30 01:45:37,567 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 01:45:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:45:37,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1210397070, now seen corresponding path program 1 times [2020-11-30 01:45:37,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:45:37,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903387791] [2020-11-30 01:45:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:45:37,578 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:45:37,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752058946] [2020-11-30 01:45:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:45:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:45:37,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-30 01:45:37,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:45:37,982 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 01:45:37,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:45:38,372 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-11-30 01:45:38,953 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 01:45:39,297 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 01:45:40,429 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-11-30 01:45:40,435 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 01:45:40,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903387791] [2020-11-30 01:45:40,436 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:45:40,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752058946] [2020-11-30 01:45:40,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1444643334] [2020-11-30 01:45:40,439 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2020-11-30 01:45:40,440 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:45:40,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:45:40,441 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:45:40,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:45:40,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:45:41,243 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 01:45:41,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:45:41,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-11-30 01:45:41,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81663328] [2020-11-30 01:45:41,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 01:45:41,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:45:41,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 01:45:41,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:45:41,245 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 18 states. [2020-11-30 01:45:42,042 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-11-30 01:45:43,079 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-11-30 01:45:44,727 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 50 [2020-11-30 01:45:48,162 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification that was a NOOP. DAG size: 53 [2020-11-30 01:45:48,354 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-11-30 01:45:50,834 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification that was a NOOP. DAG size: 50 [2020-11-30 01:45:54,075 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-11-30 01:45:54,426 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-11-30 01:45:56,786 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-30 01:45:58,565 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-11-30 01:46:00,806 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 31 [2020-11-30 01:46:02,843 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 44 [2020-11-30 01:46:04,070 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-30 01:46:06,752 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 46 [2020-11-30 01:46:09,442 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-11-30 01:46:18,185 WARN L193 SmtUtils]: Spent 5.66 s on a formula simplification that was a NOOP. DAG size: 53 [2020-11-30 01:46:18,771 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 01:46:19,412 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-11-30 01:46:20,743 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 01:46:22,806 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-11-30 01:46:24,457 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-11-30 01:46:25,990 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-11-30 01:46:29,529 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-11-30 01:46:31,925 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 36 [2020-11-30 01:46:34,340 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-30 01:46:35,691 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-11-30 01:46:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:35,923 INFO L93 Difference]: Finished difference Result 243 states and 291 transitions. [2020-11-30 01:46:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-30 01:46:35,942 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-11-30 01:46:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:35,944 INFO L225 Difference]: With dead ends: 243 [2020-11-30 01:46:35,944 INFO L226 Difference]: Without dead ends: 234 [2020-11-30 01:46:35,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=707, Invalid=2833, Unknown=0, NotChecked=0, Total=3540 [2020-11-30 01:46:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-11-30 01:46:35,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 92. [2020-11-30 01:46:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-30 01:46:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-11-30 01:46:35,965 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 28 [2020-11-30 01:46:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:35,965 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-11-30 01:46:35,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 01:46:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-11-30 01:46:35,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 01:46:35,966 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:35,966 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, 1] [2020-11-30 01:46:36,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-11-30 01:46:36,167 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 01:46:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:36,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1564930080, now seen corresponding path program 1 times [2020-11-30 01:46:36,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:36,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741718065] [2020-11-30 01:46:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:36,186 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:46:36,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865668065] [2020-11-30 01:46:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:46:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:46:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:46:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:46:36,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:46:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:46:36,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741718065] [2020-11-30 01:46:36,310 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:46:36,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865668065] [2020-11-30 01:46:36,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1389558386] [2020-11-30 01:46:36,312 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2020-11-30 01:46:36,312 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:46:36,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:46:36,313 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:46:36,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:46:36,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:46:36,861 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 01:46:36,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:46:36,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-30 01:46:36,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714107265] [2020-11-30 01:46:36,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:46:36,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:36,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:46:36,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:46:36,863 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 9 states. [2020-11-30 01:46:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:37,071 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-11-30 01:46:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:46:37,074 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-11-30 01:46:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:37,075 INFO L225 Difference]: With dead ends: 116 [2020-11-30 01:46:37,075 INFO L226 Difference]: Without dead ends: 94 [2020-11-30 01:46:37,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:46:37,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-30 01:46:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-11-30 01:46:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-30 01:46:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2020-11-30 01:46:37,103 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 28 [2020-11-30 01:46:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:37,105 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2020-11-30 01:46:37,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:46:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2020-11-30 01:46:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-30 01:46:37,109 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:37,109 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:37,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-11-30 01:46:37,320 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 01:46:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:37,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1367551516, now seen corresponding path program 1 times [2020-11-30 01:46:37,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:37,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39946267] [2020-11-30 01:46:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:37,327 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:46:37,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379912536] [2020-11-30 01:46:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/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 01:46:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:46:37,385 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:46:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:46:37,407 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:46:37,444 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 01:46:37,444 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:46:37,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:46:37,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:46:37 BoogieIcfgContainer [2020-11-30 01:46:37,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:46:37,739 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:46:37,739 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:46:37,739 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:46:37,740 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:44:53" (3/4) ... [2020-11-30 01:46:37,742 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:46:37,799 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_95946a5f-4c98-486a-976c-9c919b6be66c/bin/utaipan/witness.graphml [2020-11-30 01:46:37,799 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:46:37,800 INFO L168 Benchmark]: Toolchain (without parser) took 105836.56 ms. Allocated memory was 100.7 MB in the beginning and 211.8 MB in the end (delta: 111.1 MB). Free memory was 69.1 MB in the beginning and 158.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:37,800 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 77.6 MB. Free memory was 35.2 MB in the beginning and 35.2 MB in the end (delta: 36.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:46:37,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.96 ms. Allocated memory is still 100.7 MB. Free memory was 68.9 MB in the beginning and 77.6 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:37,801 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.46 ms. Allocated memory is still 100.7 MB. Free memory was 77.6 MB in the beginning and 76.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:46:37,801 INFO L168 Benchmark]: Boogie Preprocessor took 54.64 ms. Allocated memory is still 100.7 MB. Free memory was 76.0 MB in the beginning and 75.0 MB in the end (delta: 993.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:37,802 INFO L168 Benchmark]: RCFGBuilder took 629.57 ms. Allocated memory is still 100.7 MB. Free memory was 75.0 MB in the beginning and 50.9 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:37,802 INFO L168 Benchmark]: TraceAbstraction took 104709.12 ms. Allocated memory was 100.7 MB in the beginning and 211.8 MB in the end (delta: 111.1 MB). Free memory was 50.4 MB in the beginning and 162.1 MB in the end (delta: -111.8 MB). Peak memory consumption was 1.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:37,803 INFO L168 Benchmark]: Witness Printer took 60.37 ms. Allocated memory is still 211.8 MB. Free memory was 161.1 MB in the beginning and 158.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:37,805 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 77.6 MB. Free memory was 35.2 MB in the beginning and 35.2 MB in the end (delta: 36.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.96 ms. Allocated memory is still 100.7 MB. Free memory was 68.9 MB in the beginning and 77.6 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.46 ms. Allocated memory is still 100.7 MB. Free memory was 77.6 MB in the beginning and 76.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.64 ms. Allocated memory is still 100.7 MB. Free memory was 76.0 MB in the beginning and 75.0 MB in the end (delta: 993.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 629.57 ms. Allocated memory is still 100.7 MB. Free memory was 75.0 MB in the beginning and 50.9 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 104709.12 ms. Allocated memory was 100.7 MB in the beginning and 211.8 MB in the end (delta: 111.1 MB). Free memory was 50.4 MB in the beginning and 162.1 MB in the end (delta: -111.8 MB). Peak memory consumption was 1.5 MB. Max. memory is 16.1 GB. * Witness Printer took 60.37 ms. Allocated memory is still 211.8 MB. Free memory was 161.1 MB in the beginning and 158.0 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: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=3] [L41] EXPR counter++ VAL [counter=4] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=4] [L48] EXPR counter++ VAL [counter=5] [L48] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L54] COND TRUE !(c >= 2 * v) VAL [counter=5] [L59] c = c - v [L60] k = k + d VAL [counter=5] [L41] EXPR counter++ VAL [counter=6] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND FALSE !(counter++<5) [L11] COND TRUE !(cond) VAL [counter=7] [L4] __assert_fail("0", "egcd3-ll.c", 4, "reach_error") VAL [counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 104.5s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 62.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 439 SDtfs, 832 SDslu, 1499 SDs, 0 SdLazy, 1105 SolverSat, 211 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 16.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 543 GetRequests, 366 SyntacticMatches, 11 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 76.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 347 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 261 NumberOfCodeBlocks, 261 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 68817 SizeOfPredicates, 79 NumberOfNonLiveVariables, 1392 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 27 InterpolantComputations, 15 PerfectInterpolantSequences, 28/72 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]: 1686, 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]: 580, 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]: 554, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 272, FLUID_QUERY_TIME[ms]: 7, FLUID_QUERIES: 82, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 5, DOMAIN_JOIN_TIME[ms]: 508, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 297, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 26, DOMAIN_ISBOTTOM_APPLICATIONS: 24, DOMAIN_ISBOTTOM_TIME[ms]: 201, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 429, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 428, 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]: 4, DAG_COMPRESSION_TIME[ms]: 24, DAG_COMPRESSION_PROCESSED_NODES: 277, DAG_COMPRESSION_RETAINED_NODES: 78, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...