./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9f3cf63c7adaf3e2c576343bf7deb0d4236e103c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 13:01:30,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:01:30,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:01:30,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:01:30,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:01:30,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:01:30,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:01:30,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:01:30,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:01:30,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:01:30,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:01:30,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:01:30,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:01:30,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:01:30,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:01:30,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:01:30,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:01:30,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:01:30,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:01:30,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:01:30,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:01:30,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:01:30,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:01:30,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:01:30,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:01:30,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:01:30,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:01:30,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:01:30,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:01:30,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:01:30,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:01:30,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:01:30,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:01:30,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:01:30,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:01:30,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:01:30,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:01:30,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:01:30,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:01:30,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:01:30,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:01:30,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 13:01:30,436 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:01:30,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:01:30,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 13:01:30,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 13:01:30,437 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 13:01:30,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:01:30,437 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:01:30,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:01:30,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:01:30,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:01:30,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:01:30,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:01:30,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:01:30,438 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:01:30,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:01:30,438 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:01:30,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:01:30,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:01:30,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 13:01:30,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:01:30,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:01:30,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:01:30,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:01:30,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:01:30,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:01:30,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 13:01:30,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:01:30,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:01:30,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:01:30,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> 9f3cf63c7adaf3e2c576343bf7deb0d4236e103c [2019-12-07 13:01:30,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:01:30,553 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:01:30,556 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:01:30,557 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:01:30,557 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:01:30,558 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2019-12-07 13:01:30,605 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/data/e67803372/d07f89da30a546beb02812f849eceb13/FLAG141740731 [2019-12-07 13:01:30,909 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:01:30,910 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2019-12-07 13:01:30,913 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/data/e67803372/d07f89da30a546beb02812f849eceb13/FLAG141740731 [2019-12-07 13:01:30,922 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/data/e67803372/d07f89da30a546beb02812f849eceb13 [2019-12-07 13:01:30,924 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:01:30,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:01:30,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:01:30,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:01:30,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:01:30,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:01:30" (1/1) ... [2019-12-07 13:01:30,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66c2a685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:30, skipping insertion in model container [2019-12-07 13:01:30,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:01:30" (1/1) ... [2019-12-07 13:01:30,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:01:30,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:01:31,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:01:31,042 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:01:31,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:01:31,094 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:01:31,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31 WrapperNode [2019-12-07 13:01:31,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:01:31,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:01:31,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:01:31,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:01:31,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31" (1/1) ... [2019-12-07 13:01:31,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31" (1/1) ... [2019-12-07 13:01:31,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:01:31,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:01:31,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:01:31,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:01:31,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31" (1/1) ... [2019-12-07 13:01:31,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31" (1/1) ... [2019-12-07 13:01:31,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31" (1/1) ... [2019-12-07 13:01:31,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31" (1/1) ... [2019-12-07 13:01:31,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31" (1/1) ... [2019-12-07 13:01:31,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31" (1/1) ... [2019-12-07 13:01:31,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31" (1/1) ... [2019-12-07 13:01:31,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:01:31,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:01:31,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:01:31,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:01:31,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/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 [2019-12-07 13:01:31,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:01:31,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:01:31,280 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:01:31,280 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 13:01:31,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:01:31 BoogieIcfgContainer [2019-12-07 13:01:31,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:01:31,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:01:31,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:01:31,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:01:31,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:01:30" (1/3) ... [2019-12-07 13:01:31,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28dafaca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:01:31, skipping insertion in model container [2019-12-07 13:01:31,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:01:31" (2/3) ... [2019-12-07 13:01:31,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28dafaca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:01:31, skipping insertion in model container [2019-12-07 13:01:31,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:01:31" (3/3) ... [2019-12-07 13:01:31,287 INFO L109 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2019-12-07 13:01:31,293 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:01:31,297 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:01:31,304 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 13:01:31,319 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:01:31,319 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:01:31,319 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:01:31,319 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:01:31,319 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:01:31,319 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:01:31,319 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:01:31,319 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:01:31,330 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-12-07 13:01:31,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 13:01:31,333 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:01:31,334 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:01:31,334 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:01:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:01:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1246292942, now seen corresponding path program 1 times [2019-12-07 13:01:31,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:01:31,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707157332] [2019-12-07 13:01:31,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:01:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:01:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:31,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707157332] [2019-12-07 13:01:31,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:01:31,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 13:01:31,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768374031] [2019-12-07 13:01:31,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 13:01:31,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:01:31,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 13:01:31,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 13:01:31,426 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2019-12-07 13:01:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:01:31,437 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2019-12-07 13:01:31,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 13:01:31,438 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-12-07 13:01:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:01:31,444 INFO L225 Difference]: With dead ends: 28 [2019-12-07 13:01:31,444 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 13:01:31,446 INFO L630 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 [2019-12-07 13:01:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 13:01:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 13:01:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 13:01:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-12-07 13:01:31,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-12-07 13:01:31,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:01:31,466 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 13:01:31,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 13:01:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-12-07 13:01:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 13:01:31,466 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:01:31,467 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:01:31,467 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:01:31,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:01:31,467 INFO L82 PathProgramCache]: Analyzing trace with hash -234964329, now seen corresponding path program 1 times [2019-12-07 13:01:31,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:01:31,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687112133] [2019-12-07 13:01:31,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:01:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:01:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:31,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687112133] [2019-12-07 13:01:31,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:01:31,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:01:31,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226223482] [2019-12-07 13:01:31,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:01:31,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:01:31,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:01:31,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:01:31,522 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2019-12-07 13:01:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:01:31,556 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-12-07 13:01:31,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:01:31,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 13:01:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:01:31,557 INFO L225 Difference]: With dead ends: 20 [2019-12-07 13:01:31,557 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 13:01:31,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:01:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 13:01:31,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 13:01:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 13:01:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-12-07 13:01:31,560 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-12-07 13:01:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:01:31,560 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-12-07 13:01:31,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:01:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-12-07 13:01:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 13:01:31,561 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:01:31,561 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:01:31,561 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:01:31,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:01:31,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1877408338, now seen corresponding path program 1 times [2019-12-07 13:01:31,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:01:31,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640904174] [2019-12-07 13:01:31,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:01:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:01:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:31,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640904174] [2019-12-07 13:01:31,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712079971] [2019-12-07 13:01:31,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/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 [2019-12-07 13:01:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:01:31,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 13:01:31,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:01:31,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:01:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:31,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:01:31,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-12-07 13:01:31,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042075811] [2019-12-07 13:01:31,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 13:01:31,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:01:31,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 13:01:31,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:01:31,657 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-12-07 13:01:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:01:31,723 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-12-07 13:01:31,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 13:01:31,723 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-07 13:01:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:01:31,725 INFO L225 Difference]: With dead ends: 39 [2019-12-07 13:01:31,725 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 13:01:31,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-12-07 13:01:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 13:01:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-12-07 13:01:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 13:01:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-12-07 13:01:31,729 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 12 [2019-12-07 13:01:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:01:31,729 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-12-07 13:01:31,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 13:01:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-12-07 13:01:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 13:01:31,730 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:01:31,730 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:01:31,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:01:31,931 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:01:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:01:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1654363901, now seen corresponding path program 2 times [2019-12-07 13:01:31,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:01:31,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411518236] [2019-12-07 13:01:31,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:01:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:01:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:32,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411518236] [2019-12-07 13:01:32,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599560723] [2019-12-07 13:01:32,022 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/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 [2019-12-07 13:01:32,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:01:32,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:01:32,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 13:01:32,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:01:32,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:01:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:32,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:01:32,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-12-07 13:01:32,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317303855] [2019-12-07 13:01:32,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 13:01:32,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:01:32,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 13:01:32,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-12-07 13:01:32,112 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 14 states. [2019-12-07 13:01:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:01:32,229 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-12-07 13:01:32,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 13:01:32,229 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-12-07 13:01:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:01:32,231 INFO L225 Difference]: With dead ends: 87 [2019-12-07 13:01:32,231 INFO L226 Difference]: Without dead ends: 73 [2019-12-07 13:01:32,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2019-12-07 13:01:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-07 13:01:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2019-12-07 13:01:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 13:01:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-12-07 13:01:32,236 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2019-12-07 13:01:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:01:32,236 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-12-07 13:01:32,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 13:01:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-12-07 13:01:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 13:01:32,237 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:01:32,237 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:01:32,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:01:32,437 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:01:32,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:01:32,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1993982939, now seen corresponding path program 3 times [2019-12-07 13:01:32,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:01:32,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330558309] [2019-12-07 13:01:32,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:01:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:01:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:32,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330558309] [2019-12-07 13:01:32,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387286029] [2019-12-07 13:01:32,541 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/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 [2019-12-07 13:01:32,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-12-07 13:01:32,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:01:32,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 13:01:32,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:01:32,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:01:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:32,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:01:32,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-12-07 13:01:32,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487468359] [2019-12-07 13:01:32,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 13:01:32,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:01:32,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 13:01:32,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2019-12-07 13:01:32,741 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 26 states. [2019-12-07 13:01:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:01:33,039 INFO L93 Difference]: Finished difference Result 207 states and 241 transitions. [2019-12-07 13:01:33,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 13:01:33,040 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2019-12-07 13:01:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:01:33,041 INFO L225 Difference]: With dead ends: 207 [2019-12-07 13:01:33,041 INFO L226 Difference]: Without dead ends: 181 [2019-12-07 13:01:33,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=473, Invalid=933, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 13:01:33,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-07 13:01:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 88. [2019-12-07 13:01:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-07 13:01:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2019-12-07 13:01:33,049 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 30 [2019-12-07 13:01:33,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:01:33,049 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2019-12-07 13:01:33,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 13:01:33,049 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2019-12-07 13:01:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-12-07 13:01:33,051 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:01:33,051 INFO L410 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:01:33,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:01:33,252 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:01:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:01:33,252 INFO L82 PathProgramCache]: Analyzing trace with hash -573736599, now seen corresponding path program 4 times [2019-12-07 13:01:33,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:01:33,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103247310] [2019-12-07 13:01:33,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:01:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:01:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:33,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103247310] [2019-12-07 13:01:33,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465186605] [2019-12-07 13:01:33,534 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/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 [2019-12-07 13:01:33,568 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:01:33,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:01:33,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 13:01:33,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:01:34,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:01:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:34,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:01:34,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2019-12-07 13:01:34,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23122949] [2019-12-07 13:01:34,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-12-07 13:01:34,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:01:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-12-07 13:01:34,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2019-12-07 13:01:34,109 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 50 states. [2019-12-07 13:01:34,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:01:34,888 INFO L93 Difference]: Finished difference Result 555 states and 625 transitions. [2019-12-07 13:01:34,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-12-07 13:01:34,888 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 54 [2019-12-07 13:01:34,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:01:34,891 INFO L225 Difference]: With dead ends: 555 [2019-12-07 13:01:34,891 INFO L226 Difference]: Without dead ends: 505 [2019-12-07 13:01:34,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1805, Invalid=3597, Unknown=0, NotChecked=0, Total=5402 [2019-12-07 13:01:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2019-12-07 13:01:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 172. [2019-12-07 13:01:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-12-07 13:01:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2019-12-07 13:01:34,906 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 54 [2019-12-07 13:01:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:01:34,907 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2019-12-07 13:01:34,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-12-07 13:01:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2019-12-07 13:01:34,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-12-07 13:01:34,910 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:01:34,910 INFO L410 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:01:35,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:01:35,111 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:01:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:01:35,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2121773071, now seen corresponding path program 5 times [2019-12-07 13:01:35,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:01:35,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776022880] [2019-12-07 13:01:35,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:01:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:01:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:35,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776022880] [2019-12-07 13:01:35,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534803987] [2019-12-07 13:01:35,924 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/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 [2019-12-07 13:01:36,001 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2019-12-07 13:01:36,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:01:36,003 INFO L264 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 53 conjunts are in the unsatisfiable core [2019-12-07 13:01:36,006 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:01:37,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:01:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:37,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:01:37,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2019-12-07 13:01:37,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376188444] [2019-12-07 13:01:37,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-12-07 13:01:37,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:01:37,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-12-07 13:01:37,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2019-12-07 13:01:37,948 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand 98 states. [2019-12-07 13:01:40,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:01:40,886 INFO L93 Difference]: Finished difference Result 1683 states and 1825 transitions. [2019-12-07 13:01:40,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2019-12-07 13:01:40,886 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 102 [2019-12-07 13:01:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:01:40,892 INFO L225 Difference]: With dead ends: 1683 [2019-12-07 13:01:40,892 INFO L226 Difference]: Without dead ends: 1585 [2019-12-07 13:01:40,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7061, Invalid=14109, Unknown=0, NotChecked=0, Total=21170 [2019-12-07 13:01:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2019-12-07 13:01:40,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 340. [2019-12-07 13:01:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2019-12-07 13:01:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 388 transitions. [2019-12-07 13:01:40,913 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 388 transitions. Word has length 102 [2019-12-07 13:01:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:01:40,914 INFO L462 AbstractCegarLoop]: Abstraction has 340 states and 388 transitions. [2019-12-07 13:01:40,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-12-07 13:01:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 388 transitions. [2019-12-07 13:01:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-12-07 13:01:40,916 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:01:40,917 INFO L410 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:01:41,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:01:41,118 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:01:41,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:01:41,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1147179775, now seen corresponding path program 6 times [2019-12-07 13:01:41,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:01:41,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646733929] [2019-12-07 13:01:41,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:01:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:01:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:43,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646733929] [2019-12-07 13:01:43,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051611748] [2019-12-07 13:01:43,852 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/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 [2019-12-07 13:01:44,047 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2019-12-07 13:01:44,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:01:44,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 101 conjunts are in the unsatisfiable core [2019-12-07 13:01:44,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:01:51,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:01:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:01:51,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:01:51,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2019-12-07 13:01:51,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545241770] [2019-12-07 13:01:51,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 194 states [2019-12-07 13:01:51,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:01:51,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2019-12-07 13:01:51,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18341, Invalid=19101, Unknown=0, NotChecked=0, Total=37442 [2019-12-07 13:01:51,528 INFO L87 Difference]: Start difference. First operand 340 states and 388 transitions. Second operand 194 states. [2019-12-07 13:02:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:02:11,142 INFO L93 Difference]: Finished difference Result 5667 states and 5953 transitions. [2019-12-07 13:02:11,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2019-12-07 13:02:11,142 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 198 [2019-12-07 13:02:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:02:11,160 INFO L225 Difference]: With dead ends: 5667 [2019-12-07 13:02:11,161 INFO L226 Difference]: Without dead ends: 5473 [2019-12-07 13:02:11,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4843 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=27941, Invalid=55869, Unknown=0, NotChecked=0, Total=83810 [2019-12-07 13:02:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2019-12-07 13:02:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 676. [2019-12-07 13:02:11,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2019-12-07 13:02:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 772 transitions. [2019-12-07 13:02:11,197 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 772 transitions. Word has length 198 [2019-12-07 13:02:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:02:11,197 INFO L462 AbstractCegarLoop]: Abstraction has 676 states and 772 transitions. [2019-12-07 13:02:11,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 194 states. [2019-12-07 13:02:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 772 transitions. [2019-12-07 13:02:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-12-07 13:02:11,206 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:02:11,206 INFO L410 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:02:11,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:02:11,407 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:02:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:02:11,408 INFO L82 PathProgramCache]: Analyzing trace with hash -506239199, now seen corresponding path program 7 times [2019-12-07 13:02:11,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:02:11,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514245025] [2019-12-07 13:02:11,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:02:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36290 trivial. 0 not checked. [2019-12-07 13:02:11,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514245025] [2019-12-07 13:02:11,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:02:11,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 13:02:11,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671516145] [2019-12-07 13:02:11,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:02:11,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:02:11,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:02:11,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:02:11,879 INFO L87 Difference]: Start difference. First operand 676 states and 772 transitions. Second operand 5 states. [2019-12-07 13:02:11,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:02:11,899 INFO L93 Difference]: Finished difference Result 1060 states and 1156 transitions. [2019-12-07 13:02:11,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:02:11,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 390 [2019-12-07 13:02:11,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:02:11,902 INFO L225 Difference]: With dead ends: 1060 [2019-12-07 13:02:11,902 INFO L226 Difference]: Without dead ends: 673 [2019-12-07 13:02:11,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 13:02:11,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-12-07 13:02:11,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-12-07 13:02:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-12-07 13:02:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 768 transitions. [2019-12-07 13:02:11,909 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 768 transitions. Word has length 390 [2019-12-07 13:02:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:02:11,909 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 768 transitions. [2019-12-07 13:02:11,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:02:11,909 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 768 transitions. [2019-12-07 13:02:11,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-12-07 13:02:11,913 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:02:11,913 INFO L410 BasicCegarLoop]: trace histogram [190, 189, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:02:11,913 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:02:11,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:02:11,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1057535531, now seen corresponding path program 1 times [2019-12-07 13:02:11,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:02:11,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738797341] [2019-12-07 13:02:11,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:02:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 35912 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 35910 trivial. 0 not checked. [2019-12-07 13:02:12,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738797341] [2019-12-07 13:02:12,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129272097] [2019-12-07 13:02:12,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/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 [2019-12-07 13:02:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:12,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 1540 conjuncts, 191 conjunts are in the unsatisfiable core [2019-12-07 13:02:12,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:02:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 35912 backedges. 35910 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 13:02:23,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:02:23,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [192] imperfect sequences [6] total 196 [2019-12-07 13:02:23,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42952340] [2019-12-07 13:02:23,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 192 states [2019-12-07 13:02:23,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:02:23,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2019-12-07 13:02:23,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18345, Invalid=19875, Unknown=0, NotChecked=0, Total=38220 [2019-12-07 13:02:23,022 INFO L87 Difference]: Start difference. First operand 673 states and 768 transitions. Second operand 192 states. [2019-12-07 13:02:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:02:25,093 INFO L93 Difference]: Finished difference Result 27572 states and 27756 transitions. [2019-12-07 13:02:25,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2019-12-07 13:02:25,093 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 390 [2019-12-07 13:02:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:02:25,097 INFO L225 Difference]: With dead ends: 27572 [2019-12-07 13:02:25,097 INFO L226 Difference]: Without dead ends: 1199 [2019-12-07 13:02:25,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=18345, Invalid=19875, Unknown=0, NotChecked=0, Total=38220 [2019-12-07 13:02:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2019-12-07 13:02:25,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1183. [2019-12-07 13:02:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1183 states. [2019-12-07 13:02:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1191 transitions. [2019-12-07 13:02:25,133 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1191 transitions. Word has length 390 [2019-12-07 13:02:25,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:02:25,134 INFO L462 AbstractCegarLoop]: Abstraction has 1183 states and 1191 transitions. [2019-12-07 13:02:25,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 192 states. [2019-12-07 13:02:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1191 transitions. [2019-12-07 13:02:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-12-07 13:02:25,137 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:02:25,138 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:02:25,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:02:25,338 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:02:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:02:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1809212719, now seen corresponding path program 2 times [2019-12-07 13:02:25,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:02:25,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801486088] [2019-12-07 13:02:25,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:02:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:02:35,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801486088] [2019-12-07 13:02:35,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828457218] [2019-12-07 13:02:35,489 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/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 [2019-12-07 13:02:35,610 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:02:35,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:02:35,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 1360 conjuncts, 197 conjunts are in the unsatisfiable core [2019-12-07 13:02:35,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:02:35,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:02:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:02:35,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:02:35,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 195 [2019-12-07 13:02:35,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592931922] [2019-12-07 13:02:35,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 195 states [2019-12-07 13:02:35,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:02:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2019-12-07 13:02:35,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18533, Invalid=19297, Unknown=0, NotChecked=0, Total=37830 [2019-12-07 13:02:35,815 INFO L87 Difference]: Start difference. First operand 1183 states and 1191 transitions. Second operand 195 states. [2019-12-07 13:02:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:02:44,494 INFO L93 Difference]: Finished difference Result 2239 states and 2346 transitions. [2019-12-07 13:02:44,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2019-12-07 13:02:44,495 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 390 [2019-12-07 13:02:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:02:44,501 INFO L225 Difference]: With dead ends: 2239 [2019-12-07 13:02:44,501 INFO L226 Difference]: Without dead ends: 2034 [2019-12-07 13:02:44,502 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=18538, Invalid=19682, Unknown=0, NotChecked=0, Total=38220 [2019-12-07 13:02:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2019-12-07 13:02:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1185. [2019-12-07 13:02:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2019-12-07 13:02:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1193 transitions. [2019-12-07 13:02:44,519 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1193 transitions. Word has length 390 [2019-12-07 13:02:44,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:02:44,520 INFO L462 AbstractCegarLoop]: Abstraction has 1185 states and 1193 transitions. [2019-12-07 13:02:44,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 195 states. [2019-12-07 13:02:44,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1193 transitions. [2019-12-07 13:02:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2019-12-07 13:02:44,523 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:02:44,524 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 93, 92, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:02:44,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:02:44,725 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:02:44,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:02:44,725 INFO L82 PathProgramCache]: Analyzing trace with hash 744709876, now seen corresponding path program 3 times [2019-12-07 13:02:44,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:02:44,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194871848] [2019-12-07 13:02:44,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:02:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18456 backedges. 0 proven. 18456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:02:55,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194871848] [2019-12-07 13:02:55,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45395212] [2019-12-07 13:02:55,007 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:02:55,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2019-12-07 13:02:55,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:02:55,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 1366 conjuncts, 198 conjunts are in the unsatisfiable core [2019-12-07 13:02:55,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:02:55,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:02:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18456 backedges. 0 proven. 18456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:02:55,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:02:55,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [195, 195] total 196 [2019-12-07 13:02:55,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714005307] [2019-12-07 13:02:55,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 196 states [2019-12-07 13:02:55,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:02:55,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2019-12-07 13:02:55,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18726, Invalid=19494, Unknown=0, NotChecked=0, Total=38220 [2019-12-07 13:02:55,562 INFO L87 Difference]: Start difference. First operand 1185 states and 1193 transitions. Second operand 196 states. [2019-12-07 13:03:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:03:01,729 INFO L93 Difference]: Finished difference Result 2055 states and 2162 transitions. [2019-12-07 13:03:01,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2019-12-07 13:03:01,729 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 392 [2019-12-07 13:03:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:03:01,735 INFO L225 Difference]: With dead ends: 2055 [2019-12-07 13:03:01,735 INFO L226 Difference]: Without dead ends: 1850 [2019-12-07 13:03:01,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=18731, Invalid=19881, Unknown=0, NotChecked=0, Total=38612 [2019-12-07 13:03:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-12-07 13:03:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1187. [2019-12-07 13:03:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1187 states. [2019-12-07 13:03:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1195 transitions. [2019-12-07 13:03:01,745 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1195 transitions. Word has length 392 [2019-12-07 13:03:01,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:03:01,746 INFO L462 AbstractCegarLoop]: Abstraction has 1187 states and 1195 transitions. [2019-12-07 13:03:01,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 196 states. [2019-12-07 13:03:01,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1195 transitions. [2019-12-07 13:03:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2019-12-07 13:03:01,748 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:03:01,748 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:03:01,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:03:01,949 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:03:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:03:01,950 INFO L82 PathProgramCache]: Analyzing trace with hash -40305799, now seen corresponding path program 4 times [2019-12-07 13:03:01,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:03:01,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289157082] [2019-12-07 13:03:01,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:03:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:03:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18642 backedges. 0 proven. 18642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:03:12,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289157082] [2019-12-07 13:03:12,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225140358] [2019-12-07 13:03:12,274 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:03:12,401 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:03:12,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:03:12,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 199 conjunts are in the unsatisfiable core [2019-12-07 13:03:12,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:03:12,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:03:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18642 backedges. 0 proven. 18642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:03:12,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:03:12,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 196] total 197 [2019-12-07 13:03:12,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951455597] [2019-12-07 13:03:12,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 197 states [2019-12-07 13:03:12,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:03:12,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2019-12-07 13:03:12,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18920, Invalid=19692, Unknown=0, NotChecked=0, Total=38612 [2019-12-07 13:03:12,618 INFO L87 Difference]: Start difference. First operand 1187 states and 1195 transitions. Second operand 197 states. [2019-12-07 13:03:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:03:19,236 INFO L93 Difference]: Finished difference Result 1869 states and 1976 transitions. [2019-12-07 13:03:19,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2019-12-07 13:03:19,236 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 394 [2019-12-07 13:03:19,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:03:19,241 INFO L225 Difference]: With dead ends: 1869 [2019-12-07 13:03:19,241 INFO L226 Difference]: Without dead ends: 1664 [2019-12-07 13:03:19,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=18925, Invalid=20081, Unknown=0, NotChecked=0, Total=39006 [2019-12-07 13:03:19,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-12-07 13:03:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1189. [2019-12-07 13:03:19,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1189 states. [2019-12-07 13:03:19,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1197 transitions. [2019-12-07 13:03:19,256 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1197 transitions. Word has length 394 [2019-12-07 13:03:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:03:19,257 INFO L462 AbstractCegarLoop]: Abstraction has 1189 states and 1197 transitions. [2019-12-07 13:03:19,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 197 states. [2019-12-07 13:03:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1197 transitions. [2019-12-07 13:03:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-12-07 13:03:19,260 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:03:19,261 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 95, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:03:19,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:03:19,462 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:03:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:03:19,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1473874622, now seen corresponding path program 5 times [2019-12-07 13:03:19,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:03:19,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762072950] [2019-12-07 13:03:19,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:03:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:03:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18830 backedges. 0 proven. 18830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:03:29,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762072950] [2019-12-07 13:03:29,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633478954] [2019-12-07 13:03:29,872 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:03:30,182 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 100 check-sat command(s) [2019-12-07 13:03:30,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:03:30,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 200 conjunts are in the unsatisfiable core [2019-12-07 13:03:30,192 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:03:30,215 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:03:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18830 backedges. 0 proven. 18830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:03:30,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:03:30,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 197] total 198 [2019-12-07 13:03:30,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729136009] [2019-12-07 13:03:30,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 198 states [2019-12-07 13:03:30,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:03:30,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2019-12-07 13:03:30,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19115, Invalid=19891, Unknown=0, NotChecked=0, Total=39006 [2019-12-07 13:03:30,399 INFO L87 Difference]: Start difference. First operand 1189 states and 1197 transitions. Second operand 198 states. [2019-12-07 13:03:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:03:39,457 INFO L93 Difference]: Finished difference Result 1681 states and 1788 transitions. [2019-12-07 13:03:39,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2019-12-07 13:03:39,457 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 396 [2019-12-07 13:03:39,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:03:39,462 INFO L225 Difference]: With dead ends: 1681 [2019-12-07 13:03:39,462 INFO L226 Difference]: Without dead ends: 1476 [2019-12-07 13:03:39,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=19120, Invalid=20282, Unknown=0, NotChecked=0, Total=39402 [2019-12-07 13:03:39,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2019-12-07 13:03:39,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1191. [2019-12-07 13:03:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1191 states. [2019-12-07 13:03:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1199 transitions. [2019-12-07 13:03:39,471 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1199 transitions. Word has length 396 [2019-12-07 13:03:39,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:03:39,471 INFO L462 AbstractCegarLoop]: Abstraction has 1191 states and 1199 transitions. [2019-12-07 13:03:39,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 198 states. [2019-12-07 13:03:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1199 transitions. [2019-12-07 13:03:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2019-12-07 13:03:39,473 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:03:39,474 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 96, 95, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:03:39,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:03:39,674 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:03:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:03:39,675 INFO L82 PathProgramCache]: Analyzing trace with hash 607345859, now seen corresponding path program 6 times [2019-12-07 13:03:39,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:03:39,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515535495] [2019-12-07 13:03:39,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:03:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:03:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 19020 backedges. 0 proven. 19020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:03:50,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515535495] [2019-12-07 13:03:50,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548745937] [2019-12-07 13:03:50,110 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:03:50,434 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2019-12-07 13:03:50,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:03:50,441 INFO L264 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 201 conjunts are in the unsatisfiable core [2019-12-07 13:03:50,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:03:50,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:03:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19020 backedges. 0 proven. 19020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:03:50,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:03:50,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198] total 199 [2019-12-07 13:03:50,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462451717] [2019-12-07 13:03:50,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 199 states [2019-12-07 13:03:50,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:03:50,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2019-12-07 13:03:50,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19311, Invalid=20091, Unknown=0, NotChecked=0, Total=39402 [2019-12-07 13:03:50,648 INFO L87 Difference]: Start difference. First operand 1191 states and 1199 transitions. Second operand 199 states. [2019-12-07 13:03:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:03:57,141 INFO L93 Difference]: Finished difference Result 1491 states and 1597 transitions. [2019-12-07 13:03:57,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2019-12-07 13:03:57,141 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 398 [2019-12-07 13:03:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:03:57,145 INFO L225 Difference]: With dead ends: 1491 [2019-12-07 13:03:57,145 INFO L226 Difference]: Without dead ends: 1286 [2019-12-07 13:03:57,146 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=19316, Invalid=20484, Unknown=0, NotChecked=0, Total=39800 [2019-12-07 13:03:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2019-12-07 13:03:57,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 998. [2019-12-07 13:03:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 998 states. [2019-12-07 13:03:57,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1004 transitions. [2019-12-07 13:03:57,153 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1004 transitions. Word has length 398 [2019-12-07 13:03:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:03:57,154 INFO L462 AbstractCegarLoop]: Abstraction has 998 states and 1004 transitions. [2019-12-07 13:03:57,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 199 states. [2019-12-07 13:03:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1004 transitions. [2019-12-07 13:03:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2019-12-07 13:03:57,156 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:03:57,156 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 97, 96, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:03:57,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:03:57,357 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:03:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:03:57,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1096860040, now seen corresponding path program 7 times [2019-12-07 13:03:57,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:03:57,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706476046] [2019-12-07 13:03:57,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:03:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 19212 backedges. 0 proven. 19212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:07,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706476046] [2019-12-07 13:04:07,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816517546] [2019-12-07 13:04:07,973 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:04:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:08,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 202 conjunts are in the unsatisfiable core [2019-12-07 13:04:08,116 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:08,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:04:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 19212 backedges. 0 proven. 19212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:08,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:04:08,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [199, 199] total 200 [2019-12-07 13:04:08,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82090338] [2019-12-07 13:04:08,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 200 states [2019-12-07 13:04:08,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:04:08,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2019-12-07 13:04:08,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19508, Invalid=20292, Unknown=0, NotChecked=0, Total=39800 [2019-12-07 13:04:08,342 INFO L87 Difference]: Start difference. First operand 998 states and 1004 transitions. Second operand 200 states. [2019-12-07 13:04:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:04:16,472 INFO L93 Difference]: Finished difference Result 1299 states and 1403 transitions. [2019-12-07 13:04:16,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2019-12-07 13:04:16,472 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 400 [2019-12-07 13:04:16,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:04:16,476 INFO L225 Difference]: With dead ends: 1299 [2019-12-07 13:04:16,476 INFO L226 Difference]: Without dead ends: 1094 [2019-12-07 13:04:16,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=19513, Invalid=20687, Unknown=0, NotChecked=0, Total=40200 [2019-12-07 13:04:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2019-12-07 13:04:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 803. [2019-12-07 13:04:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2019-12-07 13:04:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 807 transitions. [2019-12-07 13:04:16,483 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 807 transitions. Word has length 400 [2019-12-07 13:04:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:04:16,484 INFO L462 AbstractCegarLoop]: Abstraction has 803 states and 807 transitions. [2019-12-07 13:04:16,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 200 states. [2019-12-07 13:04:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 807 transitions. [2019-12-07 13:04:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2019-12-07 13:04:16,485 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:04:16,486 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 98, 97, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:04:16,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:04:16,687 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:04:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:16,687 INFO L82 PathProgramCache]: Analyzing trace with hash -926414579, now seen corresponding path program 8 times [2019-12-07 13:04:16,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:16,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991803151] [2019-12-07 13:04:16,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19406 backedges. 0 proven. 19406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:27,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991803151] [2019-12-07 13:04:27,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151217691] [2019-12-07 13:04:27,368 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:04:27,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:04:27,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:04:27,496 INFO L264 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 203 conjunts are in the unsatisfiable core [2019-12-07 13:04:27,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:27,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:04:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 19406 backedges. 0 proven. 19406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:27,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:04:27,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [200, 200] total 201 [2019-12-07 13:04:27,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245982964] [2019-12-07 13:04:27,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 201 states [2019-12-07 13:04:27,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:04:27,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2019-12-07 13:04:27,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19706, Invalid=20494, Unknown=0, NotChecked=0, Total=40200 [2019-12-07 13:04:27,719 INFO L87 Difference]: Start difference. First operand 803 states and 807 transitions. Second operand 201 states. [2019-12-07 13:04:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:04:33,438 INFO L93 Difference]: Finished difference Result 1105 states and 1207 transitions. [2019-12-07 13:04:33,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2019-12-07 13:04:33,438 INFO L78 Accepts]: Start accepts. Automaton has 201 states. Word has length 402 [2019-12-07 13:04:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:04:33,441 INFO L225 Difference]: With dead ends: 1105 [2019-12-07 13:04:33,441 INFO L226 Difference]: Without dead ends: 900 [2019-12-07 13:04:33,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=19711, Invalid=20891, Unknown=0, NotChecked=0, Total=40602 [2019-12-07 13:04:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2019-12-07 13:04:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 606. [2019-12-07 13:04:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2019-12-07 13:04:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 608 transitions. [2019-12-07 13:04:33,449 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 608 transitions. Word has length 402 [2019-12-07 13:04:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:04:33,449 INFO L462 AbstractCegarLoop]: Abstraction has 606 states and 608 transitions. [2019-12-07 13:04:33,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 201 states. [2019-12-07 13:04:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 608 transitions. [2019-12-07 13:04:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2019-12-07 13:04:33,451 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:04:33,452 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 99, 98, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:04:33,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:04:33,653 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:04:33,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:33,654 INFO L82 PathProgramCache]: Analyzing trace with hash 326861650, now seen corresponding path program 9 times [2019-12-07 13:04:33,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:33,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311557968] [2019-12-07 13:04:33,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 19602 backedges. 0 proven. 19602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:44,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311557968] [2019-12-07 13:04:44,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658217604] [2019-12-07 13:04:44,443 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:04:44,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2019-12-07 13:04:44,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:04:44,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 204 conjunts are in the unsatisfiable core [2019-12-07 13:04:44,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:44,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:04:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19602 backedges. 0 proven. 19602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:45,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:04:45,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [201, 201] total 202 [2019-12-07 13:04:45,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136551925] [2019-12-07 13:04:45,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 202 states [2019-12-07 13:04:45,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:04:45,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2019-12-07 13:04:45,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19905, Invalid=20697, Unknown=0, NotChecked=0, Total=40602 [2019-12-07 13:04:45,009 INFO L87 Difference]: Start difference. First operand 606 states and 608 transitions. Second operand 202 states. [2019-12-07 13:04:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:04:51,326 INFO L93 Difference]: Finished difference Result 909 states and 1009 transitions. [2019-12-07 13:04:51,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2019-12-07 13:04:51,327 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 404 [2019-12-07 13:04:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:04:51,329 INFO L225 Difference]: With dead ends: 909 [2019-12-07 13:04:51,329 INFO L226 Difference]: Without dead ends: 704 [2019-12-07 13:04:51,330 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=19910, Invalid=21096, Unknown=0, NotChecked=0, Total=41006 [2019-12-07 13:04:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-12-07 13:04:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 407. [2019-12-07 13:04:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2019-12-07 13:04:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2019-12-07 13:04:51,334 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 404 [2019-12-07 13:04:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:04:51,334 INFO L462 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2019-12-07 13:04:51,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 202 states. [2019-12-07 13:04:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2019-12-07 13:04:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2019-12-07 13:04:51,335 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:04:51,336 INFO L410 BasicCegarLoop]: trace histogram [100, 100, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:04:51,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:04:51,536 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:04:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:51,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2134474839, now seen corresponding path program 10 times [2019-12-07 13:04:51,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:51,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478504555] [2019-12-07 13:04:51,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 19800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:05:02,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478504555] [2019-12-07 13:05:02,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923091043] [2019-12-07 13:05:02,417 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:05:02,558 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:05:02,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:05:02,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 205 conjunts are in the unsatisfiable core [2019-12-07 13:05:02,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:02,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 19800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:05:02,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:05:02,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202] total 203 [2019-12-07 13:05:02,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359782310] [2019-12-07 13:05:02,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 203 states [2019-12-07 13:05:02,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:05:02,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2019-12-07 13:05:02,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20105, Invalid=20901, Unknown=0, NotChecked=0, Total=41006 [2019-12-07 13:05:02,784 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand 203 states. [2019-12-07 13:05:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:05:09,703 INFO L93 Difference]: Finished difference Result 707 states and 807 transitions. [2019-12-07 13:05:09,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2019-12-07 13:05:09,703 INFO L78 Accepts]: Start accepts. Automaton has 203 states. Word has length 406 [2019-12-07 13:05:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:05:09,704 INFO L225 Difference]: With dead ends: 707 [2019-12-07 13:05:09,704 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 13:05:09,705 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=20110, Invalid=21302, Unknown=0, NotChecked=0, Total=41412 [2019-12-07 13:05:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 13:05:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 13:05:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 13:05:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 13:05:09,705 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 406 [2019-12-07 13:05:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:05:09,705 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:05:09,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 203 states. [2019-12-07 13:05:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 13:05:09,705 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 13:05:09,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:05:09,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 13:05:09,920 INFO L249 CegarLoopResult]: At program point L27(lines 10 28) the Hoare annotation is: true [2019-12-07 13:05:09,920 INFO L246 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-12-07 13:05:09,920 INFO L246 CegarLoopResult]: For program point L15-2(lines 14 17) no Hoare annotation was computed. [2019-12-07 13:05:09,920 INFO L246 CegarLoopResult]: For program point L15-3(lines 10 28) no Hoare annotation was computed. [2019-12-07 13:05:09,920 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 13:05:09,920 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 13:05:09,920 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-12-07 13:05:09,920 INFO L246 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2019-12-07 13:05:09,920 INFO L246 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-12-07 13:05:09,920 INFO L249 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-12-07 13:05:09,920 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 13:05:09,921 INFO L249 CegarLoopResult]: At program point L25(lines 10 28) the Hoare annotation is: true [2019-12-07 13:05:09,921 INFO L246 CegarLoopResult]: For program point L21(lines 21 24) no Hoare annotation was computed. [2019-12-07 13:05:09,921 INFO L246 CegarLoopResult]: For program point L21-2(lines 20 24) no Hoare annotation was computed. [2019-12-07 13:05:09,921 INFO L246 CegarLoopResult]: For program point L21-3(lines 10 28) no Hoare annotation was computed. [2019-12-07 13:05:09,921 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-12-07 13:05:09,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:05:09 BoogieIcfgContainer [2019-12-07 13:05:09,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:05:09,929 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:05:09,929 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:05:09,929 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:05:09,929 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:01:31" (3/4) ... [2019-12-07 13:05:09,932 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 13:05:09,942 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-12-07 13:05:09,942 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 13:05:09,973 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6b39ac0d-34e6-4735-9cc6-b3476a7be08d/bin/uautomizer/witness.graphml [2019-12-07 13:05:09,974 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:05:09,975 INFO L168 Benchmark]: Toolchain (without parser) took 219050.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 943.4 MB in the beginning and 865.4 MB in the end (delta: 78.0 MB). Peak memory consumption was 234.2 MB. Max. memory is 11.5 GB. [2019-12-07 13:05:09,975 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:05:09,975 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -176.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 13:05:09,976 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:05:09,976 INFO L168 Benchmark]: Boogie Preprocessor took 11.94 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:05:09,976 INFO L168 Benchmark]: RCFGBuilder took 153.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2019-12-07 13:05:09,976 INFO L168 Benchmark]: TraceAbstraction took 218646.28 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 32.5 MB). Free memory was 1.1 GB in the beginning and 867.6 MB in the end (delta: 232.4 MB). Peak memory consumption was 264.9 MB. Max. memory is 11.5 GB. [2019-12-07 13:05:09,977 INFO L168 Benchmark]: Witness Printer took 45.12 ms. Allocated memory is still 1.2 GB. Free memory was 867.6 MB in the beginning and 865.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 11.5 GB. [2019-12-07 13:05:09,978 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -176.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.94 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 153.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 218646.28 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 32.5 MB). Free memory was 1.1 GB in the beginning and 867.6 MB in the end (delta: 232.4 MB). Peak memory consumption was 264.9 MB. Max. memory is 11.5 GB. * Witness Printer took 45.12 ms. Allocated memory is still 1.2 GB. Free memory was 867.6 MB in the beginning and 865.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Result: SAFE, OverallTime: 218.5s, OverallIterations: 19, TraceHistogramMax: 191, AutomataDifference: 90.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 318 SDtfs, 8884 SDslu, 7131 SDs, 0 SdLazy, 12246 SolverSat, 4897 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6950 GetRequests, 4399 SyntacticMatches, 0 SemanticMatches, 2551 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10270 ImplicationChecksByTransitivity, 125.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1191occurred in iteration=14, 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, 19 MinimizatonAttempts, 9959 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 6 NumberOfFragments, 3 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 119.3s InterpolantComputationTime, 9180 NumberOfCodeBlocks, 9180 NumberOfCodeBlocksAsserted, 587 NumberOfCheckSat, 9145 ConstructedInterpolants, 0 QuantifiedInterpolants, 10450445 SizeOfPredicates, 46 NumberOfNonLiveVariables, 15544 ConjunctsInSsa, 2219 ConjunctsInUnsatCore, 35 InterpolantComputations, 4 PerfectInterpolantSequences, 108112/474054 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...