./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-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_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/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 a0a2e9e6948695d7aa90a7d2948ec209dec0a274 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:34:56,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:34:56,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:34:57,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:34:57,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:34:57,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:34:57,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:34:57,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:34:57,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:34:57,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:34:57,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:34:57,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:34:57,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:34:57,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:34:57,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:34:57,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:34:57,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:34:57,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:34:57,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:34:57,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:34:57,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:34:57,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:34:57,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:34:57,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:34:57,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:34:57,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:34:57,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:34:57,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:34:57,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:34:57,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:34:57,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:34:57,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:34:57,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:34:57,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:34:57,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:34:57,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:34:57,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:34:57,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:34:57,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:34:57,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:34:57,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:34:57,064 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:34:57,086 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:34:57,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:34:57,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:34:57,088 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:34:57,088 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:34:57,088 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:34:57,088 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:34:57,088 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:34:57,089 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:34:57,089 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:34:57,089 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:34:57,089 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:34:57,089 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:34:57,090 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:34:57,090 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:34:57,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:34:57,091 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:34:57,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:34:57,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:34:57,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:34:57,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:34:57,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:34:57,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:34:57,092 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:34:57,092 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:34:57,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:34:57,092 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:34:57,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:34:57,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:34:57,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:34:57,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:34:57,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:34:57,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:34:57,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:34:57,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:34:57,094 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:34:57,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:34:57,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:34:57,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:34:57,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:34:57,095 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_3fa00693-e472-40da-9731-7b5d056d5d5e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0a2e9e6948695d7aa90a7d2948ec209dec0a274 [2020-11-28 07:34:57,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:34:57,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:34:57,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:34:57,350 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:34:57,351 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:34:57,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2020-11-28 07:34:57,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan/data/1c07f5a11/f0817c8b05c94f61b4b4c23ad5cdfc39/FLAG63029b170 [2020-11-28 07:34:57,847 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:34:57,847 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2020-11-28 07:34:57,855 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan/data/1c07f5a11/f0817c8b05c94f61b4b4c23ad5cdfc39/FLAG63029b170 [2020-11-28 07:34:58,268 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan/data/1c07f5a11/f0817c8b05c94f61b4b4c23ad5cdfc39 [2020-11-28 07:34:58,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:34:58,272 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:34:58,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:34:58,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:34:58,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:34:58,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:34:58" (1/1) ... [2020-11-28 07:34:58,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77df47e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58, skipping insertion in model container [2020-11-28 07:34:58,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:34:58" (1/1) ... [2020-11-28 07:34:58,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:34:58,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:34:58,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:34:58,533 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:34:58,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:34:58,582 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:34:58,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58 WrapperNode [2020-11-28 07:34:58,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:34:58,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:34:58,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:34:58,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:34:58,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58" (1/1) ... [2020-11-28 07:34:58,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58" (1/1) ... [2020-11-28 07:34:58,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:34:58,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:34:58,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:34:58,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:34:58,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58" (1/1) ... [2020-11-28 07:34:58,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58" (1/1) ... [2020-11-28 07:34:58,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58" (1/1) ... [2020-11-28 07:34:58,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58" (1/1) ... [2020-11-28 07:34:58,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58" (1/1) ... [2020-11-28 07:34:58,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58" (1/1) ... [2020-11-28 07:34:58,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58" (1/1) ... [2020-11-28 07:34:58,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:34:58,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:34:58,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:34:58,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:34:58,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/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 [2020-11-28 07:34:58,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:34:58,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:34:58,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:34:58,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:34:59,151 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:34:59,151 INFO L298 CfgBuilder]: Removed 36 assume(true) statements. [2020-11-28 07:34:59,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:59 BoogieIcfgContainer [2020-11-28 07:34:59,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:34:59,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:34:59,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:34:59,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:34:59,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:34:58" (1/3) ... [2020-11-28 07:34:59,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428d815b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:34:59, skipping insertion in model container [2020-11-28 07:34:59,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:58" (2/3) ... [2020-11-28 07:34:59,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428d815b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:34:59, skipping insertion in model container [2020-11-28 07:34:59,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:59" (3/3) ... [2020-11-28 07:34:59,172 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound5.c [2020-11-28 07:34:59,183 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:34:59,187 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-28 07:34:59,200 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-28 07:34:59,225 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:34:59,226 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:34:59,226 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:34:59,226 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:34:59,226 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:34:59,227 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:34:59,227 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:34:59,227 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:34:59,242 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-28 07:34:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:34:59,247 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:59,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:34:59,248 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:59,254 INFO L82 PathProgramCache]: Analyzing trace with hash 159617293, now seen corresponding path program 1 times [2020-11-28 07:34:59,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:59,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438102579] [2020-11-28 07:34:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:34:59,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438102579] [2020-11-28 07:34:59,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:59,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:34:59,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484569296] [2020-11-28 07:34:59,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:34:59,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:59,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:34:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:34:59,414 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-11-28 07:34:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:59,432 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2020-11-28 07:34:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:34:59,433 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-28 07:34:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:59,441 INFO L225 Difference]: With dead ends: 71 [2020-11-28 07:34:59,441 INFO L226 Difference]: Without dead ends: 34 [2020-11-28 07:34:59,444 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 [2020-11-28 07:34:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-28 07:34:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-28 07:34:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 07:34:59,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-11-28 07:34:59,477 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 5 [2020-11-28 07:34:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:59,477 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-11-28 07:34:59,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:34:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-11-28 07:34:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:34:59,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:59,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:34:59,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:34:59,479 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:59,480 INFO L82 PathProgramCache]: Analyzing trace with hash 156511088, now seen corresponding path program 1 times [2020-11-28 07:34:59,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:59,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813144518] [2020-11-28 07:34:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:59,499 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:34:59,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113624415] [2020-11-28 07:34:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/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 [2020-11-28 07:34:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:59,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 07:34:59,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:34:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:34:59,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:34:59,707 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:34:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:34:59,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813144518] [2020-11-28 07:34:59,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:34:59,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113624415] [2020-11-28 07:34:59,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:59,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:34:59,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672238332] [2020-11-28 07:34:59,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:34:59,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:59,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:34:59,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:34:59,726 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-11-28 07:35:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:02,000 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-11-28 07:35:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:35:02,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-28 07:35:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:02,006 INFO L225 Difference]: With dead ends: 85 [2020-11-28 07:35:02,006 INFO L226 Difference]: Without dead ends: 79 [2020-11-28 07:35:02,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:35:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-28 07:35:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2020-11-28 07:35:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 07:35:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-11-28 07:35:02,018 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 5 [2020-11-28 07:35:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:02,019 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-11-28 07:35:02,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:35:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-11-28 07:35:02,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:35:02,019 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:02,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:35:02,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 07:35:02,220 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:02,221 INFO L82 PathProgramCache]: Analyzing trace with hash 556911243, now seen corresponding path program 1 times [2020-11-28 07:35:02,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:02,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339917229] [2020-11-28 07:35:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:02,235 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:35:02,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986785150] [2020-11-28 07:35:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/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 [2020-11-28 07:35:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:02,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:35:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:02,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:02,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339917229] [2020-11-28 07:35:02,351 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:02,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986785150] [2020-11-28 07:35:02,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:02,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-28 07:35:02,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900891963] [2020-11-28 07:35:02,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:35:02,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:02,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:35:02,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:35:02,354 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-11-28 07:35:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:02,410 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-11-28 07:35:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:35:02,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-28 07:35:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:02,412 INFO L225 Difference]: With dead ends: 64 [2020-11-28 07:35:02,412 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 07:35:02,413 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 [2020-11-28 07:35:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 07:35:02,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-11-28 07:35:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 07:35:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-11-28 07:35:02,427 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 6 [2020-11-28 07:35:02,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:02,427 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-11-28 07:35:02,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:35:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-11-28 07:35:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:35:02,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:02,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:02,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:02,642 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:02,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:02,642 INFO L82 PathProgramCache]: Analyzing trace with hash 83486771, now seen corresponding path program 1 times [2020-11-28 07:35:02,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:02,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959427652] [2020-11-28 07:35:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:02,657 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:35:02,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116831856] [2020-11-28 07:35:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/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 [2020-11-28 07:35:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:02,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 07:35:02,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:02,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:02,771 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:35:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:02,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959427652] [2020-11-28 07:35:02,799 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:02,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116831856] [2020-11-28 07:35:02,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:02,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:35:02,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260072671] [2020-11-28 07:35:02,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:35:02,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:02,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:35:02,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:35:02,801 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 5 states. [2020-11-28 07:35:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:02,941 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-11-28 07:35:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:35:02,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-28 07:35:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:02,945 INFO L225 Difference]: With dead ends: 92 [2020-11-28 07:35:02,945 INFO L226 Difference]: Without dead ends: 84 [2020-11-28 07:35:02,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:35:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-28 07:35:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-11-28 07:35:02,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-28 07:35:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-11-28 07:35:02,959 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 7 [2020-11-28 07:35:02,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:02,959 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-11-28 07:35:02,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:35:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-11-28 07:35:02,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:35:02,960 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:02,960 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:03,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:03,187 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:03,187 INFO L82 PathProgramCache]: Analyzing trace with hash -608980738, now seen corresponding path program 1 times [2020-11-28 07:35:03,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:03,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157740736] [2020-11-28 07:35:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:03,202 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:35:03,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248168468] [2020-11-28 07:35:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/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 [2020-11-28 07:35:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:03,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:35:03,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:03,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:03,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157740736] [2020-11-28 07:35:03,385 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:03,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248168468] [2020-11-28 07:35:03,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:03,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-28 07:35:03,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704350196] [2020-11-28 07:35:03,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:35:03,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:03,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:35:03,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:35:03,388 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 8 states. [2020-11-28 07:35:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:03,487 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2020-11-28 07:35:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:35:03,488 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-28 07:35:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:03,490 INFO L225 Difference]: With dead ends: 156 [2020-11-28 07:35:03,490 INFO L226 Difference]: Without dead ends: 110 [2020-11-28 07:35:03,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:35:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-28 07:35:03,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2020-11-28 07:35:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-28 07:35:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-11-28 07:35:03,515 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 15 [2020-11-28 07:35:03,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:03,515 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-11-28 07:35:03,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:35:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-11-28 07:35:03,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:35:03,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:03,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:03,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:03,726 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:03,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:03,726 INFO L82 PathProgramCache]: Analyzing trace with hash -126968315, now seen corresponding path program 1 times [2020-11-28 07:35:03,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:03,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062813054] [2020-11-28 07:35:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:03,754 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:35:03,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477600044] [2020-11-28 07:35:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/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 [2020-11-28 07:35:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:03,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 07:35:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:03,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:35:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:03,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:03,891 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:35:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:03,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062813054] [2020-11-28 07:35:03,922 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:03,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477600044] [2020-11-28 07:35:03,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:03,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-28 07:35:03,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577904376] [2020-11-28 07:35:03,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:35:03,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:03,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:35:03,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:35:03,924 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 7 states. [2020-11-28 07:35:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:04,034 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2020-11-28 07:35:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:35:04,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-28 07:35:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:04,036 INFO L225 Difference]: With dead ends: 101 [2020-11-28 07:35:04,036 INFO L226 Difference]: Without dead ends: 99 [2020-11-28 07:35:04,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:35:04,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-28 07:35:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-11-28 07:35:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-28 07:35:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-11-28 07:35:04,051 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 15 [2020-11-28 07:35:04,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:04,052 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-11-28 07:35:04,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:35:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-11-28 07:35:04,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 07:35:04,053 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:04,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:04,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 07:35:04,267 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:04,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:04,268 INFO L82 PathProgramCache]: Analyzing trace with hash -14347308, now seen corresponding path program 1 times [2020-11-28 07:35:04,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:04,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999513860] [2020-11-28 07:35:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:04,288 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:35:04,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106804942] [2020-11-28 07:35:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/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 [2020-11-28 07:35:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:04,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 07:35:04,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:04,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:35:04,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:35:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:04,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:04,427 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:35:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:35:04,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999513860] [2020-11-28 07:35:04,459 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:04,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106804942] [2020-11-28 07:35:04,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148945365] [2020-11-28 07:35:04,486 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-11-28 07:35:04,486 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:35:04,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:35:04,503 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:35:04,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:35:04,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:35:05,600 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:35:05,823 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-11-28 07:35:06,147 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-28 07:35:06,491 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-11-28 07:35:06,829 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-11-28 07:35:07,639 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-11-28 07:35:08,024 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-11-28 07:35:08,412 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-11-28 07:35:09,196 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-11-28 07:35:09,704 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-11-28 07:35:10,444 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-11-28 07:35:11,292 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-11-28 07:35:11,560 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-28 07:35:11,564 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:11,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:35:11,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-28 07:35:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762171210] [2020-11-28 07:35:11,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:35:11,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:11,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:35:11,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:35:11,566 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 7 states. [2020-11-28 07:35:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:11,911 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2020-11-28 07:35:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:35:11,912 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-28 07:35:11,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:11,915 INFO L225 Difference]: With dead ends: 137 [2020-11-28 07:35:11,915 INFO L226 Difference]: Without dead ends: 131 [2020-11-28 07:35:11,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-11-28 07:35:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-28 07:35:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 73. [2020-11-28 07:35:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-28 07:35:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-11-28 07:35:11,932 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 21 [2020-11-28 07:35:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:11,933 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-11-28 07:35:11,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:35:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-11-28 07:35:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 07:35:11,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:11,934 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:12,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:12,154 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1677668213, now seen corresponding path program 1 times [2020-11-28 07:35:12,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:12,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625518369] [2020-11-28 07:35:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:12,165 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:35:12,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070675379] [2020-11-28 07:35:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/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 [2020-11-28 07:35:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:12,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:35:12,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:12,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:12,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625518369] [2020-11-28 07:35:12,293 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:12,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070675379] [2020-11-28 07:35:12,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1613618494] [2020-11-28 07:35:12,296 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-28 07:35:12,296 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:35:12,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:35:12,296 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:35:12,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:35:12,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:35:12,767 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:35:13,011 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-11-28 07:35:13,545 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 129 [2020-11-28 07:35:13,741 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-28 07:35:13,998 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-11-28 07:35:14,213 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-11-28 07:35:14,692 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-11-28 07:35:15,122 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-11-28 07:35:16,339 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-11-28 07:35:16,640 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-28 07:35:16,641 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:16,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:35:16,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-28 07:35:16,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627065222] [2020-11-28 07:35:16,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 07:35:16,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:16,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 07:35:16,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-11-28 07:35:16,643 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 9 states. [2020-11-28 07:35:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:16,783 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2020-11-28 07:35:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 07:35:16,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-11-28 07:35:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:16,785 INFO L225 Difference]: With dead ends: 119 [2020-11-28 07:35:16,785 INFO L226 Difference]: Without dead ends: 115 [2020-11-28 07:35:16,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2020-11-28 07:35:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-28 07:35:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2020-11-28 07:35:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-28 07:35:16,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-11-28 07:35:16,799 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 21 [2020-11-28 07:35:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:16,800 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-11-28 07:35:16,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 07:35:16,800 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-11-28 07:35:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 07:35:16,801 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:16,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:17,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-28 07:35:17,022 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:17,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash -468999629, now seen corresponding path program 1 times [2020-11-28 07:35:17,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:17,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952392158] [2020-11-28 07:35:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:17,030 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:35:17,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378867746] [2020-11-28 07:35:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/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 [2020-11-28 07:35:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:17,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 07:35:17,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:17,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:17,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952392158] [2020-11-28 07:35:17,210 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:17,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378867746] [2020-11-28 07:35:17,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477547210] [2020-11-28 07:35:17,213 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-11-28 07:35:17,213 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:35:17,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:35:17,215 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:35:17,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:35:17,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:35:17,653 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:35:18,145 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-11-28 07:35:18,722 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 126 [2020-11-28 07:35:18,891 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:35:19,146 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-11-28 07:35:19,499 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-11-28 07:35:20,075 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-11-28 07:35:22,033 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-11-28 07:35:23,170 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:23,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:35:23,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-28 07:35:23,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702172624] [2020-11-28 07:35:23,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:35:23,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:23,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:35:23,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:35:23,172 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 8 states. [2020-11-28 07:35:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:23,174 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-11-28 07:35:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:35:23,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-11-28 07:35:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:23,174 INFO L225 Difference]: With dead ends: 88 [2020-11-28 07:35:23,174 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:35:23,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:35:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:35:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:35:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:35:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:35:23,176 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-11-28 07:35:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:23,176 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:35:23,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:35:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:35:23,176 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:35:23,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-28 07:35:23,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:35:23,435 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:35:23,435 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:35:23,435 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:35:23,435 INFO L274 CegarLoopResult]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2020-11-28 07:35:23,436 INFO L270 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: false [2020-11-28 07:35:23,436 INFO L274 CegarLoopResult]: For program point L37-4(lines 37 61) no Hoare annotation was computed. [2020-11-28 07:35:23,436 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:35:23,436 INFO L274 CegarLoopResult]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2020-11-28 07:35:23,436 INFO L270 CegarLoopResult]: At program point L46-3(lines 46 58) the Hoare annotation is: false [2020-11-28 07:35:23,436 INFO L274 CegarLoopResult]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2020-11-28 07:35:23,436 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:35:23,436 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:35:23,436 INFO L274 CegarLoopResult]: For program point L15(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:35:23,436 INFO L270 CegarLoopResult]: At program point L15-1(lines 14 20) the Hoare annotation is: false [2020-11-28 07:35:23,436 INFO L274 CegarLoopResult]: For program point L15-2(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:35:23,437 INFO L270 CegarLoopResult]: At program point L15-3(lines 41 42) the Hoare annotation is: false [2020-11-28 07:35:23,437 INFO L274 CegarLoopResult]: For program point L15-4(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:35:23,437 INFO L270 CegarLoopResult]: At program point L15-5(lines 14 20) the Hoare annotation is: false [2020-11-28 07:35:23,437 INFO L274 CegarLoopResult]: For program point L15-6(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:35:23,437 INFO L270 CegarLoopResult]: At program point L15-7(lines 14 20) the Hoare annotation is: false [2020-11-28 07:35:23,437 INFO L274 CegarLoopResult]: For program point L15-8(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:35:23,437 INFO L270 CegarLoopResult]: At program point L15-9(lines 51 52) the Hoare annotation is: false [2020-11-28 07:35:23,437 INFO L274 CegarLoopResult]: For program point L15-10(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:35:23,437 INFO L270 CegarLoopResult]: At program point L15-11(lines 14 20) the Hoare annotation is: false [2020-11-28 07:35:23,437 INFO L274 CegarLoopResult]: For program point L15-12(lines 15 18) no Hoare annotation was computed. [2020-11-28 07:35:23,437 INFO L277 CegarLoopResult]: At program point L15-13(lines 14 20) the Hoare annotation is: true [2020-11-28 07:35:23,438 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:35:23,438 INFO L274 CegarLoopResult]: For program point L16(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:35:23,438 INFO L274 CegarLoopResult]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:35:23,438 INFO L274 CegarLoopResult]: For program point L16-2(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:35:23,438 INFO L274 CegarLoopResult]: For program point L16-3(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:35:23,438 INFO L274 CegarLoopResult]: For program point L16-4(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:35:23,438 INFO L274 CegarLoopResult]: For program point L16-5(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:35:23,438 INFO L274 CegarLoopResult]: For program point L16-6(lines 16 17) no Hoare annotation was computed. [2020-11-28 07:35:23,438 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:35:23,438 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-28 07:35:23,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:35:23 BoogieIcfgContainer [2020-11-28 07:35:23,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:35:23,448 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:35:23,448 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:35:23,449 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:35:23,449 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:59" (3/4) ... [2020-11-28 07:35:23,452 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:35:23,462 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-28 07:35:23,463 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-28 07:35:23,463 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:35:23,464 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:35:23,541 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3fa00693-e472-40da-9731-7b5d056d5d5e/bin/utaipan/witness.graphml [2020-11-28 07:35:23,541 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:35:23,542 INFO L168 Benchmark]: Toolchain (without parser) took 25269.52 ms. Allocated memory was 115.3 MB in the beginning and 270.5 MB in the end (delta: 155.2 MB). Free memory was 89.1 MB in the beginning and 243.8 MB in the end (delta: -154.8 MB). Peak memory consumption was 160.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:23,542 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 81.8 MB. Free memory was 44.1 MB in the beginning and 44.0 MB in the end (delta: 56.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:35:23,543 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.07 ms. Allocated memory is still 115.3 MB. Free memory was 88.8 MB in the beginning and 91.3 MB in the end (delta: -2.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:23,543 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.81 ms. Allocated memory is still 115.3 MB. Free memory was 91.3 MB in the beginning and 89.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:23,544 INFO L168 Benchmark]: Boogie Preprocessor took 24.76 ms. Allocated memory is still 115.3 MB. Free memory was 89.7 MB in the beginning and 88.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:35:23,544 INFO L168 Benchmark]: RCFGBuilder took 509.03 ms. Allocated memory is still 115.3 MB. Free memory was 88.4 MB in the beginning and 67.6 MB in the end (delta: 20.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:23,544 INFO L168 Benchmark]: TraceAbstraction took 24292.30 ms. Allocated memory was 115.3 MB in the beginning and 270.5 MB in the end (delta: 155.2 MB). Free memory was 67.0 MB in the beginning and 88.2 MB in the end (delta: -21.2 MB). Peak memory consumption was 134.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:23,545 INFO L168 Benchmark]: Witness Printer took 92.81 ms. Allocated memory is still 270.5 MB. Free memory was 88.2 MB in the beginning and 243.8 MB in the end (delta: -155.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:23,548 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 81.8 MB. Free memory was 44.1 MB in the beginning and 44.0 MB in the end (delta: 56.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 309.07 ms. Allocated memory is still 115.3 MB. Free memory was 88.8 MB in the beginning and 91.3 MB in the end (delta: -2.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.81 ms. Allocated memory is still 115.3 MB. Free memory was 91.3 MB in the beginning and 89.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.76 ms. Allocated memory is still 115.3 MB. Free memory was 89.7 MB in the beginning and 88.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 509.03 ms. Allocated memory is still 115.3 MB. Free memory was 88.4 MB in the beginning and 67.6 MB in the end (delta: 20.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24292.30 ms. Allocated memory was 115.3 MB in the beginning and 270.5 MB in the end (delta: 155.2 MB). Free memory was 67.0 MB in the beginning and 88.2 MB in the end (delta: -21.2 MB). Peak memory consumption was 134.3 MB. Max. memory is 16.1 GB. * Witness Printer took 92.81 ms. Allocated memory is still 270.5 MB. Free memory was 88.2 MB in the beginning and 243.8 MB in the end (delta: -155.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.1s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 247 SDtfs, 424 SDslu, 619 SDs, 0 SdLazy, 339 SolverSat, 77 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 294 GetRequests, 181 SyntacticMatches, 22 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 16.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 163 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 10 NumberOfFragments, 9 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 212 ConstructedInterpolants, 0 QuantifiedInterpolants, 16399 SizeOfPredicates, 41 NumberOfNonLiveVariables, 705 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 17 InterpolantComputations, 11 PerfectInterpolantSequences, 6/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...