./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 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 0.1.24-678e011 [2019-11-19 22:33:41,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:33:41,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:33:41,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:33:41,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:33:41,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:33:41,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:33:41,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:33:41,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:33:41,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:33:41,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:33:41,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:33:41,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:33:41,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:33:41,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:33:41,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:33:41,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:33:41,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:33:41,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:33:41,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:33:41,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:33:41,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:33:41,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:33:41,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:33:41,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:33:41,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:33:41,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:33:41,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:33:41,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:33:41,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:33:41,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:33:41,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:33:41,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:33:41,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:33:41,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:33:41,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:33:41,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:33:41,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:33:41,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:33:41,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:33:41,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:33:41,129 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 22:33:41,141 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:33:41,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:33:41,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:33:41,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:33:41,142 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:33:41,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:33:41,143 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 22:33:41,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:33:41,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 22:33:41,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:33:41,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 22:33:41,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 22:33:41,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 22:33:41,144 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 22:33:41,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 22:33:41,144 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:33:41,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 22:33:41,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:33:41,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:33:41,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 22:33:41,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 22:33:41,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 22:33:41,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:33:41,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 22:33:41,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 22:33:41,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 22:33:41,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 22:33:41,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 22:33:41,147 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_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:33:41,282 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:33:41,296 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:33:41,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:33:41,300 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:33:41,300 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:33:41,301 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/bin/uautomizer/../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2019-11-19 22:33:41,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/bin/uautomizer/data/18875b2f2/8c09a9748ce54b4485c29eb681c69823/FLAG95c1f3df5 [2019-11-19 22:33:41,745 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:33:41,746 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2019-11-19 22:33:41,751 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/bin/uautomizer/data/18875b2f2/8c09a9748ce54b4485c29eb681c69823/FLAG95c1f3df5 [2019-11-19 22:33:41,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/bin/uautomizer/data/18875b2f2/8c09a9748ce54b4485c29eb681c69823 [2019-11-19 22:33:41,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:33:41,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 22:33:41,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:33:41,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:33:41,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:33:41,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:33:41" (1/1) ... [2019-11-19 22:33:41,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c07e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:41, skipping insertion in model container [2019-11-19 22:33:41,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:33:41" (1/1) ... [2019-11-19 22:33:41,790 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:33:41,808 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:33:41,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:33:41,974 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:33:42,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:33:42,068 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:33:42,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42 WrapperNode [2019-11-19 22:33:42,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:33:42,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 22:33:42,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 22:33:42,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 22:33:42,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42" (1/1) ... [2019-11-19 22:33:42,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42" (1/1) ... [2019-11-19 22:33:42,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 22:33:42,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:33:42,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:33:42,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:33:42,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42" (1/1) ... [2019-11-19 22:33:42,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42" (1/1) ... [2019-11-19 22:33:42,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42" (1/1) ... [2019-11-19 22:33:42,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42" (1/1) ... [2019-11-19 22:33:42,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42" (1/1) ... [2019-11-19 22:33:42,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42" (1/1) ... [2019-11-19 22:33:42,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42" (1/1) ... [2019-11-19 22:33:42,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:33:42,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:33:42,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:33:42,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:33:42,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:33:42,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:33:42,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:33:42,396 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:33:42,396 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-19 22:33:42,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:33:42 BoogieIcfgContainer [2019-11-19 22:33:42,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:33:42,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 22:33:42,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 22:33:42,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 22:33:42,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:33:41" (1/3) ... [2019-11-19 22:33:42,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1775c9a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:33:42, skipping insertion in model container [2019-11-19 22:33:42,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:33:42" (2/3) ... [2019-11-19 22:33:42,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1775c9a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:33:42, skipping insertion in model container [2019-11-19 22:33:42,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:33:42" (3/3) ... [2019-11-19 22:33:42,404 INFO L109 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2019-11-19 22:33:42,413 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 22:33:42,419 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 22:33:42,428 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 22:33:42,450 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 22:33:42,450 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 22:33:42,450 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 22:33:42,450 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:33:42,450 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:33:42,451 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 22:33:42,451 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:33:42,451 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 22:33:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-19 22:33:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-19 22:33:42,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:33:42,473 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:33:42,473 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:33:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:33:42,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1246292942, now seen corresponding path program 1 times [2019-11-19 22:33:42,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:33:42,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103667443] [2019-11-19 22:33:42,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:33:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:33:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:42,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103667443] [2019-11-19 22:33:42,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:33:42,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 22:33:42,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607620262] [2019-11-19 22:33:42,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 22:33:42,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:33:42,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 22:33:42,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 22:33:42,603 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2019-11-19 22:33:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:33:42,619 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2019-11-19 22:33:42,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 22:33:42,620 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-19 22:33:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:33:42,628 INFO L225 Difference]: With dead ends: 28 [2019-11-19 22:33:42,628 INFO L226 Difference]: Without dead ends: 11 [2019-11-19 22:33:42,631 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 [2019-11-19 22:33:42,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-19 22:33:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-19 22:33:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-19 22:33:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-19 22:33:42,654 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-11-19 22:33:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:33:42,654 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-19 22:33:42,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 22:33:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-19 22:33:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 22:33:42,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:33:42,655 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:33:42,656 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:33:42,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:33:42,656 INFO L82 PathProgramCache]: Analyzing trace with hash -234964329, now seen corresponding path program 1 times [2019-11-19 22:33:42,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:33:42,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905808648] [2019-11-19 22:33:42,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:33:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:33:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:42,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905808648] [2019-11-19 22:33:42,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:33:42,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-19 22:33:42,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525295117] [2019-11-19 22:33:42,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:33:42,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:33:42,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:33:42,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:33:42,722 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2019-11-19 22:33:42,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:33:42,802 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-11-19 22:33:42,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 22:33:42,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-19 22:33:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:33:42,803 INFO L225 Difference]: With dead ends: 20 [2019-11-19 22:33:42,803 INFO L226 Difference]: Without dead ends: 16 [2019-11-19 22:33:42,804 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 [2019-11-19 22:33:42,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-19 22:33:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-19 22:33:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-19 22:33:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-19 22:33:42,808 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-11-19 22:33:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:33:42,808 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-19 22:33:42,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:33:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-19 22:33:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 22:33:42,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:33:42,809 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:33:42,809 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:33:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:33:42,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1877408338, now seen corresponding path program 1 times [2019-11-19 22:33:42,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:33:42,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529355417] [2019-11-19 22:33:42,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:33:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:33:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:42,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529355417] [2019-11-19 22:33:42,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330797713] [2019-11-19 22:33:42,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:33:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:33:42,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 22:33:42,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:33:42,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:33:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:43,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:33:43,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-19 22:33:43,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173259815] [2019-11-19 22:33:43,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 22:33:43,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:33:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 22:33:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:33:43,003 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-11-19 22:33:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:33:43,135 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-11-19 22:33:43,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 22:33:43,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-11-19 22:33:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:33:43,138 INFO L225 Difference]: With dead ends: 39 [2019-11-19 22:33:43,138 INFO L226 Difference]: Without dead ends: 31 [2019-11-19 22:33:43,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-19 22:33:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-19 22:33:43,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-11-19 22:33:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-19 22:33:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-11-19 22:33:43,153 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 12 [2019-11-19 22:33:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:33:43,155 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-11-19 22:33:43,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 22:33:43,155 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-11-19 22:33:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 22:33:43,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:33:43,157 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:33:43,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:33:43,360 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:33:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:33:43,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1654363901, now seen corresponding path program 2 times [2019-11-19 22:33:43,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:33:43,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432691475] [2019-11-19 22:33:43,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:33:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:33:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:43,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432691475] [2019-11-19 22:33:43,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275186939] [2019-11-19 22:33:43,498 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:33:43,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:33:43,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:33:43,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 22:33:43,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:33:43,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:33:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:43,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:33:43,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-19 22:33:43,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929670423] [2019-11-19 22:33:43,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-19 22:33:43,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:33:43,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-19 22:33:43,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-11-19 22:33:43,677 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 14 states. [2019-11-19 22:33:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:33:43,922 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-11-19 22:33:43,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-19 22:33:43,922 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-11-19 22:33:43,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:33:43,924 INFO L225 Difference]: With dead ends: 87 [2019-11-19 22:33:43,924 INFO L226 Difference]: Without dead ends: 73 [2019-11-19 22:33:43,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2019-11-19 22:33:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-19 22:33:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2019-11-19 22:33:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-19 22:33:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-11-19 22:33:43,931 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2019-11-19 22:33:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:33:43,931 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-11-19 22:33:43,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-19 22:33:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-11-19 22:33:43,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-19 22:33:43,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:33:43,933 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:33:44,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:33:44,137 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:33:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:33:44,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1993982939, now seen corresponding path program 3 times [2019-11-19 22:33:44,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:33:44,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747041713] [2019-11-19 22:33:44,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:33:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:33:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:44,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747041713] [2019-11-19 22:33:44,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024109405] [2019-11-19 22:33:44,365 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:33:44,416 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-19 22:33:44,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:33:44,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-19 22:33:44,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:33:44,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:33:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:44,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:33:44,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-11-19 22:33:44,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513530488] [2019-11-19 22:33:44,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-19 22:33:44,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:33:44,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-19 22:33:44,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2019-11-19 22:33:44,733 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 26 states. [2019-11-19 22:33:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:33:45,321 INFO L93 Difference]: Finished difference Result 207 states and 241 transitions. [2019-11-19 22:33:45,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-19 22:33:45,322 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2019-11-19 22:33:45,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:33:45,324 INFO L225 Difference]: With dead ends: 207 [2019-11-19 22:33:45,324 INFO L226 Difference]: Without dead ends: 181 [2019-11-19 22:33:45,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=473, Invalid=933, Unknown=0, NotChecked=0, Total=1406 [2019-11-19 22:33:45,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-19 22:33:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 88. [2019-11-19 22:33:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-19 22:33:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2019-11-19 22:33:45,338 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 30 [2019-11-19 22:33:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:33:45,339 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2019-11-19 22:33:45,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-19 22:33:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2019-11-19 22:33:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-19 22:33:45,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:33:45,342 INFO L410 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:33:45,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:33:45,550 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:33:45,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:33:45,550 INFO L82 PathProgramCache]: Analyzing trace with hash -573736599, now seen corresponding path program 4 times [2019-11-19 22:33:45,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:33:45,551 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100962472] [2019-11-19 22:33:45,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:33:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:33:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:46,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100962472] [2019-11-19 22:33:46,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406516395] [2019-11-19 22:33:46,016 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:33:46,073 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:33:46,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:33:46,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-19 22:33:46,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:33:46,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:33:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:46,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:33:46,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2019-11-19 22:33:46,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662345081] [2019-11-19 22:33:46,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-19 22:33:46,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:33:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-19 22:33:46,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2019-11-19 22:33:46,994 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 50 states. [2019-11-19 22:33:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:33:48,312 INFO L93 Difference]: Finished difference Result 555 states and 625 transitions. [2019-11-19 22:33:48,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-11-19 22:33:48,312 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 54 [2019-11-19 22:33:48,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:33:48,317 INFO L225 Difference]: With dead ends: 555 [2019-11-19 22:33:48,317 INFO L226 Difference]: Without dead ends: 505 [2019-11-19 22:33:48,320 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3597, Unknown=0, NotChecked=0, Total=5402 [2019-11-19 22:33:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2019-11-19 22:33:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 172. [2019-11-19 22:33:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-19 22:33:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2019-11-19 22:33:48,337 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 54 [2019-11-19 22:33:48,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:33:48,337 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2019-11-19 22:33:48,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-19 22:33:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2019-11-19 22:33:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-19 22:33:48,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:33:48,342 INFO L410 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:33:48,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:33:48,545 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:33:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:33:48,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2121773071, now seen corresponding path program 5 times [2019-11-19 22:33:48,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:33:48,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793795239] [2019-11-19 22:33:48,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:33:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:33:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:49,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793795239] [2019-11-19 22:33:49,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087405049] [2019-11-19 22:33:49,971 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:33:50,105 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2019-11-19 22:33:50,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:33:50,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 53 conjunts are in the unsatisfiable core [2019-11-19 22:33:50,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:33:52,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:33:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:33:52,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:33:52,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2019-11-19 22:33:52,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643251182] [2019-11-19 22:33:52,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-11-19 22:33:52,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:33:52,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-11-19 22:33:52,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2019-11-19 22:33:52,866 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand 98 states. [2019-11-19 22:33:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:33:56,478 INFO L93 Difference]: Finished difference Result 1683 states and 1825 transitions. [2019-11-19 22:33:56,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2019-11-19 22:33:56,478 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 102 [2019-11-19 22:33:56,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:33:56,486 INFO L225 Difference]: With dead ends: 1683 [2019-11-19 22:33:56,486 INFO L226 Difference]: Without dead ends: 1585 [2019-11-19 22:33:56,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=7061, Invalid=14109, Unknown=0, NotChecked=0, Total=21170 [2019-11-19 22:33:56,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2019-11-19 22:33:56,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 340. [2019-11-19 22:33:56,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2019-11-19 22:33:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 388 transitions. [2019-11-19 22:33:56,517 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 388 transitions. Word has length 102 [2019-11-19 22:33:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:33:56,517 INFO L462 AbstractCegarLoop]: Abstraction has 340 states and 388 transitions. [2019-11-19 22:33:56,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-11-19 22:33:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 388 transitions. [2019-11-19 22:33:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-11-19 22:33:56,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:33:56,522 INFO L410 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:33:56,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:33:56,726 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:33:56,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:33:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1147179775, now seen corresponding path program 6 times [2019-11-19 22:33:56,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:33:56,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603989434] [2019-11-19 22:33:56,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:33:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:34:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:34:00,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603989434] [2019-11-19 22:34:00,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582947884] [2019-11-19 22:34:00,505 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:34:00,779 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2019-11-19 22:34:00,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:34:00,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 101 conjunts are in the unsatisfiable core [2019-11-19 22:34:00,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:34:11,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:34:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:34:11,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:34:11,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2019-11-19 22:34:11,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038025199] [2019-11-19 22:34:11,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 194 states [2019-11-19 22:34:11,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:34:11,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2019-11-19 22:34:11,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18341, Invalid=19101, Unknown=0, NotChecked=0, Total=37442 [2019-11-19 22:34:11,222 INFO L87 Difference]: Start difference. First operand 340 states and 388 transitions. Second operand 194 states. [2019-11-19 22:34:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:34:34,161 INFO L93 Difference]: Finished difference Result 5667 states and 5953 transitions. [2019-11-19 22:34:34,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2019-11-19 22:34:34,161 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 198 [2019-11-19 22:34:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:34:34,184 INFO L225 Difference]: With dead ends: 5667 [2019-11-19 22:34:34,185 INFO L226 Difference]: Without dead ends: 5473 [2019-11-19 22:34:34,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4843 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=27941, Invalid=55869, Unknown=0, NotChecked=0, Total=83810 [2019-11-19 22:34:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2019-11-19 22:34:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 676. [2019-11-19 22:34:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2019-11-19 22:34:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 772 transitions. [2019-11-19 22:34:34,228 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 772 transitions. Word has length 198 [2019-11-19 22:34:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:34:34,228 INFO L462 AbstractCegarLoop]: Abstraction has 676 states and 772 transitions. [2019-11-19 22:34:34,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 194 states. [2019-11-19 22:34:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 772 transitions. [2019-11-19 22:34:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-11-19 22:34:34,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:34:34,234 INFO L410 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:34:34,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:34:34,439 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:34:34,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:34:34,439 INFO L82 PathProgramCache]: Analyzing trace with hash -506239199, now seen corresponding path program 7 times [2019-11-19 22:34:34,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:34:34,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045757627] [2019-11-19 22:34:34,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:34:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:34:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36290 trivial. 0 not checked. [2019-11-19 22:34:35,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045757627] [2019-11-19 22:34:35,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:34:35,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 22:34:35,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388542641] [2019-11-19 22:34:35,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 22:34:35,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:34:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 22:34:35,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 22:34:35,250 INFO L87 Difference]: Start difference. First operand 676 states and 772 transitions. Second operand 5 states. [2019-11-19 22:34:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:34:35,298 INFO L93 Difference]: Finished difference Result 1060 states and 1156 transitions. [2019-11-19 22:34:35,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 22:34:35,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 390 [2019-11-19 22:34:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:34:35,301 INFO L225 Difference]: With dead ends: 1060 [2019-11-19 22:34:35,301 INFO L226 Difference]: Without dead ends: 673 [2019-11-19 22:34:35,303 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 [2019-11-19 22:34:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-11-19 22:34:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-11-19 22:34:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-11-19 22:34:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 768 transitions. [2019-11-19 22:34:35,315 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 768 transitions. Word has length 390 [2019-11-19 22:34:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:34:35,315 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 768 transitions. [2019-11-19 22:34:35,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 22:34:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 768 transitions. [2019-11-19 22:34:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-11-19 22:34:35,322 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:34:35,322 INFO L410 BasicCegarLoop]: trace histogram [190, 189, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:34:35,322 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:34:35,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:34:35,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1057535531, now seen corresponding path program 1 times [2019-11-19 22:34:35,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:34:35,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524491972] [2019-11-19 22:34:35,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:34:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:34:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 35912 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 35910 trivial. 0 not checked. [2019-11-19 22:34:36,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524491972] [2019-11-19 22:34:36,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637243066] [2019-11-19 22:34:36,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:34:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:34:36,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 1540 conjuncts, 191 conjunts are in the unsatisfiable core [2019-11-19 22:34:36,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:34:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 35912 backedges. 35910 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 22:34:50,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:34:50,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [192] imperfect sequences [6] total 196 [2019-11-19 22:34:50,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328057015] [2019-11-19 22:34:50,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 192 states [2019-11-19 22:34:50,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:34:50,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2019-11-19 22:34:50,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18345, Invalid=19875, Unknown=0, NotChecked=0, Total=38220 [2019-11-19 22:34:50,765 INFO L87 Difference]: Start difference. First operand 673 states and 768 transitions. Second operand 192 states. [2019-11-19 22:34:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:34:52,731 INFO L93 Difference]: Finished difference Result 27572 states and 27756 transitions. [2019-11-19 22:34:52,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2019-11-19 22:34:52,731 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 390 [2019-11-19 22:34:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:34:52,736 INFO L225 Difference]: With dead ends: 27572 [2019-11-19 22:34:52,736 INFO L226 Difference]: Without dead ends: 1199 [2019-11-19 22:34:52,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=18345, Invalid=19875, Unknown=0, NotChecked=0, Total=38220 [2019-11-19 22:34:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2019-11-19 22:34:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1183. [2019-11-19 22:34:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1183 states. [2019-11-19 22:34:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1191 transitions. [2019-11-19 22:34:52,776 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1191 transitions. Word has length 390 [2019-11-19 22:34:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:34:52,776 INFO L462 AbstractCegarLoop]: Abstraction has 1183 states and 1191 transitions. [2019-11-19 22:34:52,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 192 states. [2019-11-19 22:34:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1191 transitions. [2019-11-19 22:34:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-11-19 22:34:52,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:34:52,784 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:34:52,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:34:52,988 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:34:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:34:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1809212719, now seen corresponding path program 2 times [2019-11-19 22:34:52,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:34:52,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105542066] [2019-11-19 22:34:52,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:34:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:35:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:35:07,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105542066] [2019-11-19 22:35:07,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860299795] [2019-11-19 22:35:07,404 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:35:07,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:35:07,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:35:07,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 1360 conjuncts, 197 conjunts are in the unsatisfiable core [2019-11-19 22:35:07,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:35:07,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:35:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:35:07,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:35:07,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 195 [2019-11-19 22:35:07,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178136306] [2019-11-19 22:35:07,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 195 states [2019-11-19 22:35:07,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:35:07,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2019-11-19 22:35:07,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18533, Invalid=19297, Unknown=0, NotChecked=0, Total=37830 [2019-11-19 22:35:07,878 INFO L87 Difference]: Start difference. First operand 1183 states and 1191 transitions. Second operand 195 states. [2019-11-19 22:35:17,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:35:17,825 INFO L93 Difference]: Finished difference Result 2239 states and 2346 transitions. [2019-11-19 22:35:17,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2019-11-19 22:35:17,826 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 390 [2019-11-19 22:35:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:35:17,833 INFO L225 Difference]: With dead ends: 2239 [2019-11-19 22:35:17,833 INFO L226 Difference]: Without dead ends: 2034 [2019-11-19 22:35:17,834 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=18538, Invalid=19682, Unknown=0, NotChecked=0, Total=38220 [2019-11-19 22:35:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2019-11-19 22:35:17,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1185. [2019-11-19 22:35:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2019-11-19 22:35:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1193 transitions. [2019-11-19 22:35:17,855 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1193 transitions. Word has length 390 [2019-11-19 22:35:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:35:17,856 INFO L462 AbstractCegarLoop]: Abstraction has 1185 states and 1193 transitions. [2019-11-19 22:35:17,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 195 states. [2019-11-19 22:35:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1193 transitions. [2019-11-19 22:35:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2019-11-19 22:35:17,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:35:17,864 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 93, 92, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:35:18,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:35:18,068 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:35:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:35:18,068 INFO L82 PathProgramCache]: Analyzing trace with hash 744709876, now seen corresponding path program 3 times [2019-11-19 22:35:18,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:35:18,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144427618] [2019-11-19 22:35:18,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:35:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:35:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18456 backedges. 0 proven. 18456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:35:32,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144427618] [2019-11-19 22:35:32,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110566044] [2019-11-19 22:35:32,445 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:35:32,879 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2019-11-19 22:35:32,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:35:32,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 1366 conjuncts, 198 conjunts are in the unsatisfiable core [2019-11-19 22:35:32,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:35:32,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:35:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18456 backedges. 0 proven. 18456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:35:33,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:35:33,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [195, 195] total 196 [2019-11-19 22:35:33,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31684155] [2019-11-19 22:35:33,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 196 states [2019-11-19 22:35:33,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:35:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2019-11-19 22:35:33,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18726, Invalid=19494, Unknown=0, NotChecked=0, Total=38220 [2019-11-19 22:35:33,162 INFO L87 Difference]: Start difference. First operand 1185 states and 1193 transitions. Second operand 196 states. [2019-11-19 22:35:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:35:40,106 INFO L93 Difference]: Finished difference Result 2055 states and 2162 transitions. [2019-11-19 22:35:40,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2019-11-19 22:35:40,106 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 392 [2019-11-19 22:35:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:35:40,112 INFO L225 Difference]: With dead ends: 2055 [2019-11-19 22:35:40,112 INFO L226 Difference]: Without dead ends: 1850 [2019-11-19 22:35:40,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=18731, Invalid=19881, Unknown=0, NotChecked=0, Total=38612 [2019-11-19 22:35:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-11-19 22:35:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1187. [2019-11-19 22:35:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1187 states. [2019-11-19 22:35:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1195 transitions. [2019-11-19 22:35:40,133 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1195 transitions. Word has length 392 [2019-11-19 22:35:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:35:40,133 INFO L462 AbstractCegarLoop]: Abstraction has 1187 states and 1195 transitions. [2019-11-19 22:35:40,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 196 states. [2019-11-19 22:35:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1195 transitions. [2019-11-19 22:35:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2019-11-19 22:35:40,140 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:35:40,140 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:35:40,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:35:40,345 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:35:40,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:35:40,346 INFO L82 PathProgramCache]: Analyzing trace with hash -40305799, now seen corresponding path program 4 times [2019-11-19 22:35:40,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:35:40,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540647811] [2019-11-19 22:35:40,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:35:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:35:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18642 backedges. 0 proven. 18642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:35:55,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540647811] [2019-11-19 22:35:55,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981152596] [2019-11-19 22:35:55,129 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:35:55,332 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:35:55,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:35:55,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 199 conjunts are in the unsatisfiable core [2019-11-19 22:35:55,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:35:55,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:35:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18642 backedges. 0 proven. 18642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:35:55,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:35:55,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 196] total 197 [2019-11-19 22:35:55,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545539370] [2019-11-19 22:35:55,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 197 states [2019-11-19 22:35:55,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:35:55,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2019-11-19 22:35:55,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18920, Invalid=19692, Unknown=0, NotChecked=0, Total=38612 [2019-11-19 22:35:55,667 INFO L87 Difference]: Start difference. First operand 1187 states and 1195 transitions. Second operand 197 states. [2019-11-19 22:36:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:36:02,881 INFO L93 Difference]: Finished difference Result 1869 states and 1976 transitions. [2019-11-19 22:36:02,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2019-11-19 22:36:02,881 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 394 [2019-11-19 22:36:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:36:02,886 INFO L225 Difference]: With dead ends: 1869 [2019-11-19 22:36:02,887 INFO L226 Difference]: Without dead ends: 1664 [2019-11-19 22:36:02,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=18925, Invalid=20081, Unknown=0, NotChecked=0, Total=39006 [2019-11-19 22:36:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-11-19 22:36:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1189. [2019-11-19 22:36:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1189 states. [2019-11-19 22:36:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1197 transitions. [2019-11-19 22:36:02,904 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1197 transitions. Word has length 394 [2019-11-19 22:36:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:36:02,905 INFO L462 AbstractCegarLoop]: Abstraction has 1189 states and 1197 transitions. [2019-11-19 22:36:02,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 197 states. [2019-11-19 22:36:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1197 transitions. [2019-11-19 22:36:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-11-19 22:36:02,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:36:02,909 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 95, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:36:03,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:36:03,113 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:36:03,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:36:03,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1473874622, now seen corresponding path program 5 times [2019-11-19 22:36:03,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:36:03,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029468717] [2019-11-19 22:36:03,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:36:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:36:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18830 backedges. 0 proven. 18830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:36:17,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029468717] [2019-11-19 22:36:17,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789762576] [2019-11-19 22:36:17,587 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:36:17,981 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 100 check-sat command(s) [2019-11-19 22:36:17,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:36:17,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 200 conjunts are in the unsatisfiable core [2019-11-19 22:36:17,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:36:18,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:36:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18830 backedges. 0 proven. 18830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:36:18,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:36:18,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 197] total 198 [2019-11-19 22:36:18,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053277499] [2019-11-19 22:36:18,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 198 states [2019-11-19 22:36:18,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:36:18,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2019-11-19 22:36:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19115, Invalid=19891, Unknown=0, NotChecked=0, Total=39006 [2019-11-19 22:36:18,334 INFO L87 Difference]: Start difference. First operand 1189 states and 1197 transitions. Second operand 198 states. [2019-11-19 22:36:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:36:27,832 INFO L93 Difference]: Finished difference Result 1681 states and 1788 transitions. [2019-11-19 22:36:27,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2019-11-19 22:36:27,832 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 396 [2019-11-19 22:36:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:36:27,839 INFO L225 Difference]: With dead ends: 1681 [2019-11-19 22:36:27,839 INFO L226 Difference]: Without dead ends: 1476 [2019-11-19 22:36:27,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=19120, Invalid=20282, Unknown=0, NotChecked=0, Total=39402 [2019-11-19 22:36:27,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2019-11-19 22:36:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1191. [2019-11-19 22:36:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1191 states. [2019-11-19 22:36:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1199 transitions. [2019-11-19 22:36:27,856 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1199 transitions. Word has length 396 [2019-11-19 22:36:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:36:27,857 INFO L462 AbstractCegarLoop]: Abstraction has 1191 states and 1199 transitions. [2019-11-19 22:36:27,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 198 states. [2019-11-19 22:36:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1199 transitions. [2019-11-19 22:36:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2019-11-19 22:36:27,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:36:27,861 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 96, 95, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:36:28,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:36:28,067 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:36:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:36:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash 607345859, now seen corresponding path program 6 times [2019-11-19 22:36:28,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:36:28,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146600552] [2019-11-19 22:36:28,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:36:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:36:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19020 backedges. 0 proven. 19020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:36:42,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146600552] [2019-11-19 22:36:42,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755203766] [2019-11-19 22:36:42,549 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:36:42,952 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2019-11-19 22:36:42,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:36:42,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 201 conjunts are in the unsatisfiable core [2019-11-19 22:36:42,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:36:42,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:36:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19020 backedges. 0 proven. 19020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:36:43,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:36:43,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198] total 199 [2019-11-19 22:36:43,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433436681] [2019-11-19 22:36:43,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 199 states [2019-11-19 22:36:43,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:36:43,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2019-11-19 22:36:43,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19311, Invalid=20091, Unknown=0, NotChecked=0, Total=39402 [2019-11-19 22:36:43,218 INFO L87 Difference]: Start difference. First operand 1191 states and 1199 transitions. Second operand 199 states. [2019-11-19 22:36:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:36:49,789 INFO L93 Difference]: Finished difference Result 1491 states and 1597 transitions. [2019-11-19 22:36:49,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2019-11-19 22:36:49,789 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 398 [2019-11-19 22:36:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:36:49,794 INFO L225 Difference]: With dead ends: 1491 [2019-11-19 22:36:49,794 INFO L226 Difference]: Without dead ends: 1286 [2019-11-19 22:36:49,795 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=19316, Invalid=20484, Unknown=0, NotChecked=0, Total=39800 [2019-11-19 22:36:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2019-11-19 22:36:49,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 998. [2019-11-19 22:36:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 998 states. [2019-11-19 22:36:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1004 transitions. [2019-11-19 22:36:49,809 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1004 transitions. Word has length 398 [2019-11-19 22:36:49,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:36:49,810 INFO L462 AbstractCegarLoop]: Abstraction has 998 states and 1004 transitions. [2019-11-19 22:36:49,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 199 states. [2019-11-19 22:36:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1004 transitions. [2019-11-19 22:36:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2019-11-19 22:36:49,813 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:36:49,813 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 97, 96, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:36:50,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:36:50,019 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:36:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:36:50,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1096860040, now seen corresponding path program 7 times [2019-11-19 22:36:50,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:36:50,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350556091] [2019-11-19 22:36:50,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:36:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:37:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 19212 backedges. 0 proven. 19212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:37:04,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350556091] [2019-11-19 22:37:04,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718650639] [2019-11-19 22:37:04,691 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:37:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:37:04,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 202 conjunts are in the unsatisfiable core [2019-11-19 22:37:04,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:37:04,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:37:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 19212 backedges. 0 proven. 19212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:37:05,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:37:05,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [199, 199] total 200 [2019-11-19 22:37:05,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424169100] [2019-11-19 22:37:05,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 200 states [2019-11-19 22:37:05,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:37:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2019-11-19 22:37:05,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19508, Invalid=20292, Unknown=0, NotChecked=0, Total=39800 [2019-11-19 22:37:05,206 INFO L87 Difference]: Start difference. First operand 998 states and 1004 transitions. Second operand 200 states. [2019-11-19 22:37:13,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:37:13,955 INFO L93 Difference]: Finished difference Result 1299 states and 1403 transitions. [2019-11-19 22:37:13,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2019-11-19 22:37:13,956 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 400 [2019-11-19 22:37:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:37:13,961 INFO L225 Difference]: With dead ends: 1299 [2019-11-19 22:37:13,962 INFO L226 Difference]: Without dead ends: 1094 [2019-11-19 22:37:13,963 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=19513, Invalid=20687, Unknown=0, NotChecked=0, Total=40200 [2019-11-19 22:37:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2019-11-19 22:37:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 803. [2019-11-19 22:37:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2019-11-19 22:37:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 807 transitions. [2019-11-19 22:37:13,975 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 807 transitions. Word has length 400 [2019-11-19 22:37:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:37:13,976 INFO L462 AbstractCegarLoop]: Abstraction has 803 states and 807 transitions. [2019-11-19 22:37:13,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 200 states. [2019-11-19 22:37:13,976 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 807 transitions. [2019-11-19 22:37:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2019-11-19 22:37:13,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:37:13,979 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 98, 97, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:37:14,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:37:14,192 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:37:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:37:14,192 INFO L82 PathProgramCache]: Analyzing trace with hash -926414579, now seen corresponding path program 8 times [2019-11-19 22:37:14,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:37:14,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020547651] [2019-11-19 22:37:14,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:37:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:37:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 19406 backedges. 0 proven. 19406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:37:28,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020547651] [2019-11-19 22:37:28,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657127095] [2019-11-19 22:37:28,966 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:37:29,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:37:29,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:37:29,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 203 conjunts are in the unsatisfiable core [2019-11-19 22:37:29,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:37:29,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:37:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19406 backedges. 0 proven. 19406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:37:29,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:37:29,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [200, 200] total 201 [2019-11-19 22:37:29,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266650971] [2019-11-19 22:37:29,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 201 states [2019-11-19 22:37:29,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:37:29,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2019-11-19 22:37:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19706, Invalid=20494, Unknown=0, NotChecked=0, Total=40200 [2019-11-19 22:37:29,437 INFO L87 Difference]: Start difference. First operand 803 states and 807 transitions. Second operand 201 states. [2019-11-19 22:37:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:37:35,237 INFO L93 Difference]: Finished difference Result 1105 states and 1207 transitions. [2019-11-19 22:37:35,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2019-11-19 22:37:35,238 INFO L78 Accepts]: Start accepts. Automaton has 201 states. Word has length 402 [2019-11-19 22:37:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:37:35,241 INFO L225 Difference]: With dead ends: 1105 [2019-11-19 22:37:35,241 INFO L226 Difference]: Without dead ends: 900 [2019-11-19 22:37:35,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=19711, Invalid=20891, Unknown=0, NotChecked=0, Total=40602 [2019-11-19 22:37:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2019-11-19 22:37:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 606. [2019-11-19 22:37:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2019-11-19 22:37:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 608 transitions. [2019-11-19 22:37:35,249 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 608 transitions. Word has length 402 [2019-11-19 22:37:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:37:35,249 INFO L462 AbstractCegarLoop]: Abstraction has 606 states and 608 transitions. [2019-11-19 22:37:35,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 201 states. [2019-11-19 22:37:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 608 transitions. [2019-11-19 22:37:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2019-11-19 22:37:35,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:37:35,252 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 99, 98, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:37:35,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:37:35,457 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:37:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:37:35,457 INFO L82 PathProgramCache]: Analyzing trace with hash 326861650, now seen corresponding path program 9 times [2019-11-19 22:37:35,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:37:35,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473422967] [2019-11-19 22:37:35,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:37:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:37:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 19602 backedges. 0 proven. 19602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:37:50,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473422967] [2019-11-19 22:37:50,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526998004] [2019-11-19 22:37:50,374 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:37:50,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2019-11-19 22:37:50,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:37:50,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 204 conjunts are in the unsatisfiable core [2019-11-19 22:37:50,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:37:50,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:37:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 19602 backedges. 0 proven. 19602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:37:51,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:37:51,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [201, 201] total 202 [2019-11-19 22:37:51,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283190921] [2019-11-19 22:37:51,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 202 states [2019-11-19 22:37:51,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:37:51,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2019-11-19 22:37:51,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19905, Invalid=20697, Unknown=0, NotChecked=0, Total=40602 [2019-11-19 22:37:51,080 INFO L87 Difference]: Start difference. First operand 606 states and 608 transitions. Second operand 202 states. [2019-11-19 22:37:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:37:57,558 INFO L93 Difference]: Finished difference Result 909 states and 1009 transitions. [2019-11-19 22:37:57,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2019-11-19 22:37:57,559 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 404 [2019-11-19 22:37:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:37:57,562 INFO L225 Difference]: With dead ends: 909 [2019-11-19 22:37:57,562 INFO L226 Difference]: Without dead ends: 704 [2019-11-19 22:37:57,564 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=19910, Invalid=21096, Unknown=0, NotChecked=0, Total=41006 [2019-11-19 22:37:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-11-19 22:37:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 407. [2019-11-19 22:37:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2019-11-19 22:37:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2019-11-19 22:37:57,570 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 404 [2019-11-19 22:37:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:37:57,570 INFO L462 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2019-11-19 22:37:57,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 202 states. [2019-11-19 22:37:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2019-11-19 22:37:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2019-11-19 22:37:57,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:37:57,573 INFO L410 BasicCegarLoop]: trace histogram [100, 100, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:37:57,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:37:57,779 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:37:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:37:57,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2134474839, now seen corresponding path program 10 times [2019-11-19 22:37:57,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:37:57,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908980642] [2019-11-19 22:37:57,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:37:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:38:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 19800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:38:12,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908980642] [2019-11-19 22:38:12,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752002693] [2019-11-19 22:38:12,806 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/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 [2019-11-19 22:38:13,006 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:38:13,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:38:13,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 205 conjunts are in the unsatisfiable core [2019-11-19 22:38:13,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:38:13,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:38:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 19800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:38:13,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:38:13,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202] total 203 [2019-11-19 22:38:13,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246053367] [2019-11-19 22:38:13,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 203 states [2019-11-19 22:38:13,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:38:13,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2019-11-19 22:38:13,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20105, Invalid=20901, Unknown=0, NotChecked=0, Total=41006 [2019-11-19 22:38:13,344 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand 203 states. [2019-11-19 22:38:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:38:20,503 INFO L93 Difference]: Finished difference Result 707 states and 807 transitions. [2019-11-19 22:38:20,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2019-11-19 22:38:20,504 INFO L78 Accepts]: Start accepts. Automaton has 203 states. Word has length 406 [2019-11-19 22:38:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:38:20,504 INFO L225 Difference]: With dead ends: 707 [2019-11-19 22:38:20,504 INFO L226 Difference]: Without dead ends: 0 [2019-11-19 22:38:20,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=20110, Invalid=21302, Unknown=0, NotChecked=0, Total=41412 [2019-11-19 22:38:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-19 22:38:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-19 22:38:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-19 22:38:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-19 22:38:20,506 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 406 [2019-11-19 22:38:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:38:20,506 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:38:20,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 203 states. [2019-11-19 22:38:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-19 22:38:20,506 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-19 22:38:20,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:38:20,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-19 22:38:20,730 INFO L447 ceAbstractionStarter]: At program point L27(lines 10 28) the Hoare annotation is: true [2019-11-19 22:38:20,730 INFO L444 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-19 22:38:20,730 INFO L444 ceAbstractionStarter]: For program point L15-2(lines 14 17) no Hoare annotation was computed. [2019-11-19 22:38:20,731 INFO L444 ceAbstractionStarter]: For program point L15-3(lines 10 28) no Hoare annotation was computed. [2019-11-19 22:38:20,731 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-19 22:38:20,731 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-19 22:38:20,731 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-19 22:38:20,731 INFO L444 ceAbstractionStarter]: For program point L12(lines 12 13) no Hoare annotation was computed. [2019-11-19 22:38:20,731 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-19 22:38:20,731 INFO L447 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-11-19 22:38:20,731 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-19 22:38:20,731 INFO L447 ceAbstractionStarter]: At program point L25(lines 10 28) the Hoare annotation is: true [2019-11-19 22:38:20,731 INFO L444 ceAbstractionStarter]: For program point L21(lines 21 24) no Hoare annotation was computed. [2019-11-19 22:38:20,731 INFO L444 ceAbstractionStarter]: For program point L21-2(lines 20 24) no Hoare annotation was computed. [2019-11-19 22:38:20,732 INFO L444 ceAbstractionStarter]: For program point L21-3(lines 10 28) no Hoare annotation was computed. [2019-11-19 22:38:20,732 INFO L444 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-19 22:38:20,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 10:38:20 BoogieIcfgContainer [2019-11-19 22:38:20,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 22:38:20,739 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:38:20,739 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:38:20,739 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:38:20,740 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:33:42" (3/4) ... [2019-11-19 22:38:20,742 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-19 22:38:20,752 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-19 22:38:20,752 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-19 22:38:20,816 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a39c685c-bcdb-4443-8ac1-d486087e66cf/bin/uautomizer/witness.graphml [2019-11-19 22:38:20,816 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:38:20,819 INFO L168 Benchmark]: Toolchain (without parser) took 279048.82 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 385.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -189.2 MB). Peak memory consumption was 196.7 MB. Max. memory is 11.5 GB. [2019-11-19 22:38:20,819 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:38:20,820 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -185.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:38:20,820 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.13 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. [2019-11-19 22:38:20,820 INFO L168 Benchmark]: Boogie Preprocessor took 30.03 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-19 22:38:20,821 INFO L168 Benchmark]: RCFGBuilder took 259.65 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: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2019-11-19 22:38:20,821 INFO L168 Benchmark]: TraceAbstraction took 278340.44 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 253.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -28.9 MB). Peak memory consumption was 224.9 MB. Max. memory is 11.5 GB. [2019-11-19 22:38:20,822 INFO L168 Benchmark]: Witness Printer took 77.48 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. [2019-11-19 22:38:20,823 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 297.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -185.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.13 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 30.03 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 259.65 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: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 278340.44 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 253.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -28.9 MB). Peak memory consumption was 224.9 MB. Max. memory is 11.5 GB. * Witness Printer took 77.48 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 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: 278.2s, OverallIterations: 19, TraceHistogramMax: 191, AutomataDifference: 99.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 318 SDtfs, 8884 SDslu, 7131 SDs, 0 SdLazy, 12246 SolverSat, 4897 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6950 GetRequests, 4399 SyntacticMatches, 0 SemanticMatches, 2551 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10270 ImplicationChecksByTransitivity, 174.9s 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: 0.2s 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: 0.6s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 167.4s 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...