./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --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_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 980109aaf5797fcdc56688cd1127831babfd66a2 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 00:17:11,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 00:17:11,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 00:17:11,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 00:17:11,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 00:17:11,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 00:17:11,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 00:17:11,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 00:17:11,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 00:17:11,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 00:17:11,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 00:17:11,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 00:17:11,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 00:17:11,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 00:17:11,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 00:17:11,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 00:17:11,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 00:17:11,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 00:17:11,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 00:17:11,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 00:17:11,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 00:17:11,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 00:17:11,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 00:17:11,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 00:17:11,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 00:17:11,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 00:17:11,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 00:17:11,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 00:17:11,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 00:17:11,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 00:17:11,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 00:17:11,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 00:17:11,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 00:17:11,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 00:17:11,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 00:17:11,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 00:17:11,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 00:17:11,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 00:17:11,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 00:17:11,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 00:17:11,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 00:17:11,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 00:17:11,150 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 00:17:11,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 00:17:11,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 00:17:11,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 00:17:11,152 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 00:17:11,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 00:17:11,152 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 00:17:11,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 00:17:11,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 00:17:11,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 00:17:11,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 00:17:11,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 00:17:11,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 00:17:11,153 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 00:17:11,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 00:17:11,154 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 00:17:11,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 00:17:11,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 00:17:11,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 00:17:11,155 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 00:17:11,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 00:17:11,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 00:17:11,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 00:17:11,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 00:17:11,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 00:17:11,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 00:17:11,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 00:17:11,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 00:17:11,157 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_dc78e168-5463-4208-81c2-a59f1bf2598e/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 -> 980109aaf5797fcdc56688cd1127831babfd66a2 [2019-11-20 00:17:11,347 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 00:17:11,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 00:17:11,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 00:17:11,370 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 00:17:11,370 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 00:17:11,372 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2019-11-20 00:17:11,440 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/data/405472fc1/9b61105d573741b89b713415f519b968/FLAG758af9ccf [2019-11-20 00:17:11,881 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 00:17:11,881 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2019-11-20 00:17:11,888 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/data/405472fc1/9b61105d573741b89b713415f519b968/FLAG758af9ccf [2019-11-20 00:17:12,302 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/data/405472fc1/9b61105d573741b89b713415f519b968 [2019-11-20 00:17:12,305 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 00:17:12,307 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 00:17:12,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 00:17:12,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 00:17:12,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 00:17:12,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:17:12" (1/1) ... [2019-11-20 00:17:12,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190f8562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12, skipping insertion in model container [2019-11-20 00:17:12,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:17:12" (1/1) ... [2019-11-20 00:17:12,325 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 00:17:12,341 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 00:17:12,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:17:12,552 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 00:17:12,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:17:12,708 INFO L192 MainTranslator]: Completed translation [2019-11-20 00:17:12,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12 WrapperNode [2019-11-20 00:17:12,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 00:17:12,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 00:17:12,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 00:17:12,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 00:17:12,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12" (1/1) ... [2019-11-20 00:17:12,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12" (1/1) ... [2019-11-20 00:17:12,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 00:17:12,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 00:17:12,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 00:17:12,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 00:17:12,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12" (1/1) ... [2019-11-20 00:17:12,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12" (1/1) ... [2019-11-20 00:17:12,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12" (1/1) ... [2019-11-20 00:17:12,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12" (1/1) ... [2019-11-20 00:17:12,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12" (1/1) ... [2019-11-20 00:17:12,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12" (1/1) ... [2019-11-20 00:17:12,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12" (1/1) ... [2019-11-20 00:17:12,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 00:17:12,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 00:17:12,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 00:17:12,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 00:17:12,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:12,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 00:17:12,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 00:17:12,823 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-20 00:17:12,823 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-20 00:17:12,987 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 00:17:12,987 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 00:17:12,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:17:12 BoogieIcfgContainer [2019-11-20 00:17:12,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 00:17:12,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 00:17:12,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 00:17:12,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 00:17:12,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:17:12" (1/3) ... [2019-11-20 00:17:12,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7811b2be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:17:12, skipping insertion in model container [2019-11-20 00:17:12,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:17:12" (2/3) ... [2019-11-20 00:17:12,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7811b2be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:17:12, skipping insertion in model container [2019-11-20 00:17:12,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:17:12" (3/3) ... [2019-11-20 00:17:12,998 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2019-11-20 00:17:13,009 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 00:17:13,016 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 00:17:13,028 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 00:17:13,056 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 00:17:13,056 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 00:17:13,057 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 00:17:13,057 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 00:17:13,057 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 00:17:13,057 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 00:17:13,057 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 00:17:13,057 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 00:17:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-20 00:17:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 00:17:13,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:13,083 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:13,083 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:13,089 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-20 00:17:13,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:13,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419355639] [2019-11-20 00:17:13,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:17:13,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419355639] [2019-11-20 00:17:13,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:17:13,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 00:17:13,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640552091] [2019-11-20 00:17:13,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 00:17:13,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 00:17:13,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 00:17:13,332 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-20 00:17:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:13,432 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-20 00:17:13,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 00:17:13,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-20 00:17:13,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:13,446 INFO L225 Difference]: With dead ends: 24 [2019-11-20 00:17:13,446 INFO L226 Difference]: Without dead ends: 14 [2019-11-20 00:17:13,450 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 00:17:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-20 00:17:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-20 00:17:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 00:17:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-20 00:17:13,489 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-20 00:17:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:13,489 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-20 00:17:13,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 00:17:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-20 00:17:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 00:17:13,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:13,495 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:13,496 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:13,496 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-20 00:17:13,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:13,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056920595] [2019-11-20 00:17:13,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 00:17:13,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056920595] [2019-11-20 00:17:13,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166601577] [2019-11-20 00:17:13,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:13,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 00:17:13,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 00:17:13,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:13,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-11-20 00:17:13,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763642082] [2019-11-20 00:17:13,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 00:17:13,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:13,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 00:17:13,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 00:17:13,747 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-20 00:17:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:13,813 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-20 00:17:13,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 00:17:13,813 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-20 00:17:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:13,814 INFO L225 Difference]: With dead ends: 21 [2019-11-20 00:17:13,814 INFO L226 Difference]: Without dead ends: 17 [2019-11-20 00:17:13,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-20 00:17:13,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-20 00:17:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-20 00:17:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 00:17:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-20 00:17:13,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-20 00:17:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:13,821 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-20 00:17:13,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 00:17:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-20 00:17:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 00:17:13,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:13,822 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:14,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:14,028 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:14,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-20 00:17:14,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:14,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454320956] [2019-11-20 00:17:14,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 00:17:14,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454320956] [2019-11-20 00:17:14,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059086362] [2019-11-20 00:17:14,188 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:14,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:17:14,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:14,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 00:17:14,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 00:17:14,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:14,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-20 00:17:14,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964741528] [2019-11-20 00:17:14,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 00:17:14,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:14,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 00:17:14,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 00:17:14,280 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2019-11-20 00:17:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:14,352 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-20 00:17:14,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 00:17:14,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-20 00:17:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:14,354 INFO L225 Difference]: With dead ends: 24 [2019-11-20 00:17:14,354 INFO L226 Difference]: Without dead ends: 20 [2019-11-20 00:17:14,355 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-11-20 00:17:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-20 00:17:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-20 00:17:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 00:17:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-20 00:17:14,360 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-20 00:17:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:14,360 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-20 00:17:14,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 00:17:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-20 00:17:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 00:17:14,361 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:14,361 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:14,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:14,565 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:14,565 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-20 00:17:14,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:14,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615630543] [2019-11-20 00:17:14,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 00:17:14,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615630543] [2019-11-20 00:17:14,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209099669] [2019-11-20 00:17:14,713 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:14,750 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-20 00:17:14,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:14,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 00:17:14,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 00:17:14,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:14,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-11-20 00:17:14,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620927003] [2019-11-20 00:17:14,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 00:17:14,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:14,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 00:17:14,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 00:17:14,808 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2019-11-20 00:17:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:14,922 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-20 00:17:14,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 00:17:14,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-20 00:17:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:14,924 INFO L225 Difference]: With dead ends: 27 [2019-11-20 00:17:14,924 INFO L226 Difference]: Without dead ends: 23 [2019-11-20 00:17:14,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-20 00:17:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-20 00:17:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-20 00:17:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 00:17:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-20 00:17:14,931 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-20 00:17:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:14,932 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-20 00:17:14,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 00:17:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-20 00:17:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 00:17:14,933 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:14,934 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:15,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:15,135 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:15,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-20 00:17:15,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:15,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259727751] [2019-11-20 00:17:15,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 00:17:15,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259727751] [2019-11-20 00:17:15,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669982387] [2019-11-20 00:17:15,355 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:15,394 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 00:17:15,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:15,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 00:17:15,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 00:17:15,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:15,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-11-20 00:17:15,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552859662] [2019-11-20 00:17:15,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 00:17:15,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:15,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 00:17:15,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-20 00:17:15,440 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2019-11-20 00:17:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:15,553 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-20 00:17:15,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 00:17:15,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-11-20 00:17:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:15,555 INFO L225 Difference]: With dead ends: 30 [2019-11-20 00:17:15,555 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 00:17:15,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:17:15,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 00:17:15,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-20 00:17:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 00:17:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-20 00:17:15,562 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-20 00:17:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:15,563 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-20 00:17:15,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 00:17:15,563 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-20 00:17:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 00:17:15,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:15,565 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:15,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:15,774 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-20 00:17:15,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:15,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547301138] [2019-11-20 00:17:15,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-20 00:17:16,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547301138] [2019-11-20 00:17:16,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548065952] [2019-11-20 00:17:16,029 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:16,070 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-20 00:17:16,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:16,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 00:17:16,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-20 00:17:16,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:16,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2019-11-20 00:17:16,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987849518] [2019-11-20 00:17:16,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 00:17:16,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:16,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 00:17:16,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-20 00:17:16,130 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2019-11-20 00:17:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:16,237 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-20 00:17:16,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 00:17:16,238 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-11-20 00:17:16,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:16,239 INFO L225 Difference]: With dead ends: 33 [2019-11-20 00:17:16,240 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 00:17:16,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-11-20 00:17:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 00:17:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-20 00:17:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 00:17:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-20 00:17:16,247 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-20 00:17:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:16,248 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-20 00:17:16,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 00:17:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-20 00:17:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-20 00:17:16,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:16,250 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:16,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:16,454 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:16,455 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-20 00:17:16,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:16,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216945906] [2019-11-20 00:17:16,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 00:17:16,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216945906] [2019-11-20 00:17:16,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735479797] [2019-11-20 00:17:16,774 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:16,830 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-20 00:17:16,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:16,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 00:17:16,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 00:17:16,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:16,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2019-11-20 00:17:16,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730218932] [2019-11-20 00:17:16,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 00:17:16,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:16,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 00:17:16,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-20 00:17:16,895 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2019-11-20 00:17:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:17,018 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-20 00:17:17,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 00:17:17,019 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-11-20 00:17:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:17,021 INFO L225 Difference]: With dead ends: 36 [2019-11-20 00:17:17,021 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 00:17:17,022 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-11-20 00:17:17,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 00:17:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-20 00:17:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-20 00:17:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-20 00:17:17,027 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-20 00:17:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:17,028 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-20 00:17:17,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 00:17:17,028 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-20 00:17:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 00:17:17,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:17,030 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:17,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:17,234 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-20 00:17:17,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:17,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325938765] [2019-11-20 00:17:17,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-20 00:17:17,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325938765] [2019-11-20 00:17:17,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089604898] [2019-11-20 00:17:17,476 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:17,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 00:17:17,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-20 00:17:17,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:17,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2019-11-20 00:17:17,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045642304] [2019-11-20 00:17:17,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 00:17:17,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:17,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 00:17:17,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-20 00:17:17,598 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-11-20 00:17:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:17,769 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-20 00:17:17,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 00:17:17,770 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2019-11-20 00:17:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:17,771 INFO L225 Difference]: With dead ends: 39 [2019-11-20 00:17:17,771 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 00:17:17,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-11-20 00:17:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 00:17:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-20 00:17:17,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 00:17:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-20 00:17:17,775 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-20 00:17:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:17,776 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-20 00:17:17,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 00:17:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-20 00:17:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-20 00:17:17,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:17,780 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:17,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:17,981 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:17,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-20 00:17:17,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:17,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505815660] [2019-11-20 00:17:17,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-20 00:17:18,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505815660] [2019-11-20 00:17:18,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308265614] [2019-11-20 00:17:18,296 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:18,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:17:18,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:18,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 00:17:18,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-20 00:17:18,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:18,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-20 00:17:18,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457716969] [2019-11-20 00:17:18,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 00:17:18,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:18,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 00:17:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-20 00:17:18,421 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 15 states. [2019-11-20 00:17:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:18,590 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-20 00:17:18,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 00:17:18,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-11-20 00:17:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:18,592 INFO L225 Difference]: With dead ends: 42 [2019-11-20 00:17:18,592 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 00:17:18,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2019-11-20 00:17:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 00:17:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-20 00:17:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 00:17:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-20 00:17:18,606 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-20 00:17:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:18,607 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-20 00:17:18,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 00:17:18,607 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-20 00:17:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-20 00:17:18,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:18,610 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:18,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:18,813 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:18,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-20 00:17:18,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:18,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604202634] [2019-11-20 00:17:18,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-20 00:17:19,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604202634] [2019-11-20 00:17:19,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82311343] [2019-11-20 00:17:19,101 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:19,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-20 00:17:19,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:19,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 00:17:19,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-20 00:17:19,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:19,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2019-11-20 00:17:19,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495394051] [2019-11-20 00:17:19,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 00:17:19,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:19,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 00:17:19,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:17:19,244 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2019-11-20 00:17:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:19,400 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-20 00:17:19,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 00:17:19,402 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2019-11-20 00:17:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:19,403 INFO L225 Difference]: With dead ends: 45 [2019-11-20 00:17:19,403 INFO L226 Difference]: Without dead ends: 41 [2019-11-20 00:17:19,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2019-11-20 00:17:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-20 00:17:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-20 00:17:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-20 00:17:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-20 00:17:19,414 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-20 00:17:19,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:19,414 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-20 00:17:19,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 00:17:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-20 00:17:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-20 00:17:19,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:19,418 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:19,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:19,619 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:19,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:19,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-20 00:17:19,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:19,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337349538] [2019-11-20 00:17:19,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-20 00:17:19,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337349538] [2019-11-20 00:17:19,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989408862] [2019-11-20 00:17:19,939 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:19,992 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 00:17:19,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:19,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 00:17:19,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-20 00:17:20,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:20,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2019-11-20 00:17:20,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816496609] [2019-11-20 00:17:20,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 00:17:20,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 00:17:20,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-11-20 00:17:20,076 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2019-11-20 00:17:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:20,265 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-20 00:17:20,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 00:17:20,265 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2019-11-20 00:17:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:20,267 INFO L225 Difference]: With dead ends: 48 [2019-11-20 00:17:20,267 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 00:17:20,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2019-11-20 00:17:20,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 00:17:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-20 00:17:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 00:17:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-20 00:17:20,274 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-20 00:17:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:20,275 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-20 00:17:20,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 00:17:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-20 00:17:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-20 00:17:20,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:20,276 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:20,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:20,477 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:20,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-20 00:17:20,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:20,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631642101] [2019-11-20 00:17:20,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-20 00:17:20,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631642101] [2019-11-20 00:17:20,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038693296] [2019-11-20 00:17:20,809 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:20,889 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-20 00:17:20,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:20,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-20 00:17:20,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-20 00:17:20,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:20,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-11-20 00:17:20,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828145204] [2019-11-20 00:17:20,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 00:17:20,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:20,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 00:17:20,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-11-20 00:17:20,967 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 18 states. [2019-11-20 00:17:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:21,150 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-20 00:17:21,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 00:17:21,151 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2019-11-20 00:17:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:21,152 INFO L225 Difference]: With dead ends: 51 [2019-11-20 00:17:21,152 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 00:17:21,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2019-11-20 00:17:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 00:17:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-20 00:17:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 00:17:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-20 00:17:21,162 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-20 00:17:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:21,163 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-20 00:17:21,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 00:17:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-20 00:17:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-20 00:17:21,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:21,165 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:21,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:21,369 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-20 00:17:21,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:21,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114250843] [2019-11-20 00:17:21,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-20 00:17:21,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114250843] [2019-11-20 00:17:21,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217395565] [2019-11-20 00:17:21,806 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:21,881 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-20 00:17:21,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:21,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 00:17:21,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-20 00:17:21,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:21,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2019-11-20 00:17:21,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124354538] [2019-11-20 00:17:21,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 00:17:21,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:21,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 00:17:21,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-11-20 00:17:21,974 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2019-11-20 00:17:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:22,210 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-20 00:17:22,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 00:17:22,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2019-11-20 00:17:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:22,212 INFO L225 Difference]: With dead ends: 54 [2019-11-20 00:17:22,212 INFO L226 Difference]: Without dead ends: 50 [2019-11-20 00:17:22,213 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2019-11-20 00:17:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-20 00:17:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-20 00:17:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-20 00:17:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-20 00:17:22,219 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-20 00:17:22,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:22,219 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-20 00:17:22,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 00:17:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-20 00:17:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-20 00:17:22,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:22,227 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:22,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:22,428 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:22,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-20 00:17:22,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:22,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218757139] [2019-11-20 00:17:22,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-20 00:17:22,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218757139] [2019-11-20 00:17:22,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935769521] [2019-11-20 00:17:22,837 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:22,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-20 00:17:22,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-20 00:17:22,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:22,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2019-11-20 00:17:22,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438080811] [2019-11-20 00:17:22,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 00:17:22,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:22,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 00:17:22,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-11-20 00:17:22,956 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 20 states. [2019-11-20 00:17:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:23,185 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-20 00:17:23,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 00:17:23,187 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2019-11-20 00:17:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:23,188 INFO L225 Difference]: With dead ends: 57 [2019-11-20 00:17:23,188 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 00:17:23,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2019-11-20 00:17:23,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 00:17:23,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-20 00:17:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 00:17:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-20 00:17:23,198 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-20 00:17:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:23,199 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-20 00:17:23,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 00:17:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-20 00:17:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-20 00:17:23,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:23,204 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:23,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:23,408 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:23,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-20 00:17:23,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:23,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713685401] [2019-11-20 00:17:23,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-20 00:17:23,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713685401] [2019-11-20 00:17:23,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655931789] [2019-11-20 00:17:23,894 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:23,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:17:23,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:23,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-20 00:17:23,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-20 00:17:24,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:24,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2019-11-20 00:17:24,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117633957] [2019-11-20 00:17:24,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 00:17:24,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 00:17:24,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2019-11-20 00:17:24,021 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2019-11-20 00:17:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:24,277 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-20 00:17:24,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 00:17:24,277 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2019-11-20 00:17:24,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:24,278 INFO L225 Difference]: With dead ends: 60 [2019-11-20 00:17:24,278 INFO L226 Difference]: Without dead ends: 56 [2019-11-20 00:17:24,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2019-11-20 00:17:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-20 00:17:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-20 00:17:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-20 00:17:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-20 00:17:24,289 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-20 00:17:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:24,289 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-20 00:17:24,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 00:17:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-20 00:17:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-20 00:17:24,295 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:24,295 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:24,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:24,496 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-20 00:17:24,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:24,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409214677] [2019-11-20 00:17:24,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-20 00:17:25,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409214677] [2019-11-20 00:17:25,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984085579] [2019-11-20 00:17:25,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:25,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-20 00:17:25,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:25,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-20 00:17:25,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-20 00:17:25,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:25,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2019-11-20 00:17:25,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597522974] [2019-11-20 00:17:25,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 00:17:25,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:25,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 00:17:25,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2019-11-20 00:17:25,177 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 22 states. [2019-11-20 00:17:25,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:25,435 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-11-20 00:17:25,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 00:17:25,436 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2019-11-20 00:17:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:25,437 INFO L225 Difference]: With dead ends: 63 [2019-11-20 00:17:25,437 INFO L226 Difference]: Without dead ends: 59 [2019-11-20 00:17:25,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2019-11-20 00:17:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-20 00:17:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-20 00:17:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-20 00:17:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-20 00:17:25,448 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-11-20 00:17:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:25,449 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-20 00:17:25,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 00:17:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-20 00:17:25,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-20 00:17:25,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:25,451 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:25,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:25,666 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:25,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-11-20 00:17:25,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:25,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774079208] [2019-11-20 00:17:25,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-20 00:17:26,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774079208] [2019-11-20 00:17:26,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415531834] [2019-11-20 00:17:26,397 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/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 [2019-11-20 00:17:26,465 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 00:17:26,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:26,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 00:17:26,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-20 00:17:26,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:26,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2019-11-20 00:17:26,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132837860] [2019-11-20 00:17:26,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-20 00:17:26,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:26,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 00:17:26,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2019-11-20 00:17:26,560 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 23 states. [2019-11-20 00:17:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:26,873 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-11-20 00:17:26,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 00:17:26,874 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2019-11-20 00:17:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:26,875 INFO L225 Difference]: With dead ends: 66 [2019-11-20 00:17:26,875 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 00:17:26,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2019-11-20 00:17:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 00:17:26,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-20 00:17:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 00:17:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-20 00:17:26,889 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-11-20 00:17:26,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:26,889 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-20 00:17:26,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-20 00:17:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-20 00:17:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-20 00:17:26,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:26,891 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:27,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:27,092 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:27,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-11-20 00:17:27,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:27,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786657205] [2019-11-20 00:17:27,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-20 00:17:27,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786657205] [2019-11-20 00:17:27,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213881929] [2019-11-20 00:17:27,815 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:27,889 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-20 00:17:27,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:27,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-20 00:17:27,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-20 00:17:27,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:27,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2019-11-20 00:17:27,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023093978] [2019-11-20 00:17:27,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 00:17:27,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:27,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 00:17:27,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2019-11-20 00:17:27,975 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 24 states. [2019-11-20 00:17:28,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:28,263 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-20 00:17:28,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 00:17:28,264 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2019-11-20 00:17:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:28,265 INFO L225 Difference]: With dead ends: 69 [2019-11-20 00:17:28,265 INFO L226 Difference]: Without dead ends: 65 [2019-11-20 00:17:28,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 00:17:28,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-20 00:17:28,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-20 00:17:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-20 00:17:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-20 00:17:28,272 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-11-20 00:17:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:28,272 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-20 00:17:28,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 00:17:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-20 00:17:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-20 00:17:28,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:28,276 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:28,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:28,479 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:28,480 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-11-20 00:17:28,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:28,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132567434] [2019-11-20 00:17:28,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-20 00:17:29,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132567434] [2019-11-20 00:17:29,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533923712] [2019-11-20 00:17:29,183 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:29,246 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-20 00:17:29,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:29,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-20 00:17:29,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-20 00:17:29,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:29,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2019-11-20 00:17:29,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602731070] [2019-11-20 00:17:29,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 00:17:29,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:29,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 00:17:29,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2019-11-20 00:17:29,379 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 25 states. [2019-11-20 00:17:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:29,709 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-11-20 00:17:29,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 00:17:29,710 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2019-11-20 00:17:29,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:29,711 INFO L225 Difference]: With dead ends: 72 [2019-11-20 00:17:29,711 INFO L226 Difference]: Without dead ends: 68 [2019-11-20 00:17:29,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2019-11-20 00:17:29,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-20 00:17:29,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-20 00:17:29,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-20 00:17:29,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-11-20 00:17:29,717 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-11-20 00:17:29,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:29,718 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-11-20 00:17:29,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 00:17:29,718 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-11-20 00:17:29,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-20 00:17:29,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:29,719 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:29,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:29,920 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:29,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-11-20 00:17:29,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:29,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499242752] [2019-11-20 00:17:29,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-20 00:17:30,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499242752] [2019-11-20 00:17:30,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541077067] [2019-11-20 00:17:30,643 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:30,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 00:17:30,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-20 00:17:30,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:30,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2019-11-20 00:17:30,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513574094] [2019-11-20 00:17:30,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 00:17:30,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:30,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 00:17:30,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2019-11-20 00:17:30,810 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 26 states. [2019-11-20 00:17:31,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:31,154 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-11-20 00:17:31,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 00:17:31,161 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2019-11-20 00:17:31,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:31,162 INFO L225 Difference]: With dead ends: 75 [2019-11-20 00:17:31,162 INFO L226 Difference]: Without dead ends: 71 [2019-11-20 00:17:31,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2019-11-20 00:17:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-20 00:17:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-20 00:17:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-20 00:17:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-11-20 00:17:31,170 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-11-20 00:17:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:31,170 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-11-20 00:17:31,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 00:17:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-11-20 00:17:31,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-20 00:17:31,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:31,172 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:31,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:31,373 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:31,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-11-20 00:17:31,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:31,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233018411] [2019-11-20 00:17:31,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-20 00:17:32,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233018411] [2019-11-20 00:17:32,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730145358] [2019-11-20 00:17:32,289 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:32,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:17:32,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:32,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-20 00:17:32,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-20 00:17:32,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:32,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2019-11-20 00:17:32,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081015353] [2019-11-20 00:17:32,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-20 00:17:32,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:32,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-20 00:17:32,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2019-11-20 00:17:32,434 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 27 states. [2019-11-20 00:17:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:32,797 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2019-11-20 00:17:32,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-20 00:17:32,797 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 129 [2019-11-20 00:17:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:32,798 INFO L225 Difference]: With dead ends: 78 [2019-11-20 00:17:32,798 INFO L226 Difference]: Without dead ends: 74 [2019-11-20 00:17:32,799 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2019-11-20 00:17:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-20 00:17:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-20 00:17:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-20 00:17:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-11-20 00:17:32,804 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2019-11-20 00:17:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:32,804 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-11-20 00:17:32,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-20 00:17:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-11-20 00:17:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-20 00:17:32,805 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:32,805 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:33,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:33,006 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:33,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:33,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2019-11-20 00:17:33,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:33,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694526046] [2019-11-20 00:17:33,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-20 00:17:33,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694526046] [2019-11-20 00:17:33,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029367442] [2019-11-20 00:17:33,858 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:33,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-20 00:17:33,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:33,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-20 00:17:33,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-20 00:17:34,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:34,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2019-11-20 00:17:34,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574921936] [2019-11-20 00:17:34,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-20 00:17:34,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:34,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-20 00:17:34,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2019-11-20 00:17:34,026 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 28 states. [2019-11-20 00:17:34,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:34,353 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2019-11-20 00:17:34,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-20 00:17:34,355 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 135 [2019-11-20 00:17:34,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:34,356 INFO L225 Difference]: With dead ends: 81 [2019-11-20 00:17:34,356 INFO L226 Difference]: Without dead ends: 77 [2019-11-20 00:17:34,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=880, Invalid=1570, Unknown=0, NotChecked=0, Total=2450 [2019-11-20 00:17:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-20 00:17:34,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-11-20 00:17:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-20 00:17:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2019-11-20 00:17:34,361 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 135 [2019-11-20 00:17:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:34,362 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2019-11-20 00:17:34,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-20 00:17:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2019-11-20 00:17:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-20 00:17:34,363 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:34,363 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:34,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:34,564 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:34,564 INFO L82 PathProgramCache]: Analyzing trace with hash -555819607, now seen corresponding path program 22 times [2019-11-20 00:17:34,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:34,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887901328] [2019-11-20 00:17:34,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-11-20 00:17:35,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887901328] [2019-11-20 00:17:35,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308413730] [2019-11-20 00:17:35,501 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:35,565 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 00:17:35,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:35,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-20 00:17:35,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-11-20 00:17:35,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:35,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2019-11-20 00:17:35,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124119698] [2019-11-20 00:17:35,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 00:17:35,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 00:17:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2019-11-20 00:17:35,650 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 29 states. [2019-11-20 00:17:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:35,940 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2019-11-20 00:17:35,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-20 00:17:35,940 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 141 [2019-11-20 00:17:35,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:35,941 INFO L225 Difference]: With dead ends: 84 [2019-11-20 00:17:35,941 INFO L226 Difference]: Without dead ends: 80 [2019-11-20 00:17:35,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2019-11-20 00:17:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-20 00:17:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-20 00:17:35,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-20 00:17:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2019-11-20 00:17:35,946 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 141 [2019-11-20 00:17:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:35,947 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2019-11-20 00:17:35,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 00:17:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2019-11-20 00:17:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-20 00:17:35,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:35,948 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:36,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:36,152 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:36,152 INFO L82 PathProgramCache]: Analyzing trace with hash -945685357, now seen corresponding path program 23 times [2019-11-20 00:17:36,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:36,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532601300] [2019-11-20 00:17:36,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-11-20 00:17:37,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532601300] [2019-11-20 00:17:37,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236458816] [2019-11-20 00:17:37,134 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:37,221 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-20 00:17:37,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:37,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-20 00:17:37,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-11-20 00:17:37,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:37,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2019-11-20 00:17:37,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029613393] [2019-11-20 00:17:37,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-20 00:17:37,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:37,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-20 00:17:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2019-11-20 00:17:37,324 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 30 states. [2019-11-20 00:17:37,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:37,605 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2019-11-20 00:17:37,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 00:17:37,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2019-11-20 00:17:37,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:37,606 INFO L225 Difference]: With dead ends: 87 [2019-11-20 00:17:37,606 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 00:17:37,607 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1031, Invalid=1831, Unknown=0, NotChecked=0, Total=2862 [2019-11-20 00:17:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 00:17:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-20 00:17:37,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-20 00:17:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2019-11-20 00:17:37,611 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 147 [2019-11-20 00:17:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:37,612 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2019-11-20 00:17:37,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-20 00:17:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2019-11-20 00:17:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-20 00:17:37,613 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:37,613 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:37,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:37,816 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:37,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1588806697, now seen corresponding path program 24 times [2019-11-20 00:17:37,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:37,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998474448] [2019-11-20 00:17:37,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-11-20 00:17:39,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998474448] [2019-11-20 00:17:39,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116536795] [2019-11-20 00:17:39,074 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:39,156 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-20 00:17:39,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:39,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 52 conjunts are in the unsatisfiable core [2019-11-20 00:17:39,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-11-20 00:17:39,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:39,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2019-11-20 00:17:39,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787847252] [2019-11-20 00:17:39,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-20 00:17:39,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:39,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-20 00:17:39,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2019-11-20 00:17:39,236 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 31 states. [2019-11-20 00:17:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:39,599 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2019-11-20 00:17:39,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-20 00:17:39,599 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 153 [2019-11-20 00:17:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:39,600 INFO L225 Difference]: With dead ends: 90 [2019-11-20 00:17:39,600 INFO L226 Difference]: Without dead ends: 86 [2019-11-20 00:17:39,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2019-11-20 00:17:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-20 00:17:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-11-20 00:17:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-20 00:17:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2019-11-20 00:17:39,606 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 153 [2019-11-20 00:17:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:39,606 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2019-11-20 00:17:39,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-20 00:17:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2019-11-20 00:17:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-20 00:17:39,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:39,608 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:39,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:39,811 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:39,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:39,811 INFO L82 PathProgramCache]: Analyzing trace with hash 959677331, now seen corresponding path program 25 times [2019-11-20 00:17:39,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:39,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266380251] [2019-11-20 00:17:39,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-11-20 00:17:42,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266380251] [2019-11-20 00:17:42,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572228367] [2019-11-20 00:17:42,973 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:43,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-20 00:17:43,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-11-20 00:17:43,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:17:43,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2019-11-20 00:17:43,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084952531] [2019-11-20 00:17:43,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-20 00:17:43,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:43,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-20 00:17:43,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-11-20 00:17:43,156 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 55 states. [2019-11-20 00:17:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:44,236 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2019-11-20 00:17:44,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-20 00:17:44,237 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 159 [2019-11-20 00:17:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:44,238 INFO L225 Difference]: With dead ends: 93 [2019-11-20 00:17:44,238 INFO L226 Difference]: Without dead ends: 89 [2019-11-20 00:17:44,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-11-20 00:17:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-20 00:17:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-11-20 00:17:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 00:17:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2019-11-20 00:17:44,244 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 159 [2019-11-20 00:17:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:44,244 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2019-11-20 00:17:44,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-20 00:17:44,245 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2019-11-20 00:17:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-20 00:17:44,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:17:44,246 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:17:44,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:44,446 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:17:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:17:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1468417367, now seen corresponding path program 26 times [2019-11-20 00:17:44,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:17:44,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249293520] [2019-11-20 00:17:44,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:17:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:17:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-11-20 00:17:45,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249293520] [2019-11-20 00:17:45,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436515937] [2019-11-20 00:17:45,738 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:45,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:17:45,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:17:45,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 56 conjunts are in the unsatisfiable core [2019-11-20 00:17:45,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:17:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-11-20 00:17:45,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 00:17:45,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 33 [2019-11-20 00:17:45,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230424770] [2019-11-20 00:17:45,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-20 00:17:45,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:17:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-20 00:17:45,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 00:17:45,965 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 31 states. [2019-11-20 00:17:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:17:46,697 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2019-11-20 00:17:46,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-20 00:17:46,698 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 165 [2019-11-20 00:17:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:17:46,698 INFO L225 Difference]: With dead ends: 89 [2019-11-20 00:17:46,699 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 00:17:46,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1226, Invalid=2314, Unknown=0, NotChecked=0, Total=3540 [2019-11-20 00:17:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 00:17:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 00:17:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 00:17:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 00:17:46,701 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 165 [2019-11-20 00:17:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:17:46,701 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 00:17:46,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-20 00:17:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 00:17:46,701 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 00:17:46,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:17:46,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 00:17:46,926 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 00:17:46,926 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 00:17:46,926 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 00:17:46,926 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-11-20 00:17:46,926 INFO L444 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2019-11-20 00:17:46,926 INFO L444 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-11-20 00:17:46,926 INFO L440 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= ULTIMATE.start_main_~input~0 25) (<= 25 ULTIMATE.start_main_~input~0)) [2019-11-20 00:17:46,926 INFO L444 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-11-20 00:17:46,927 INFO L444 ceAbstractionStarter]: For program point L9(lines 9 15) no Hoare annotation was computed. [2019-11-20 00:17:46,927 INFO L444 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-11-20 00:17:46,927 INFO L444 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-11-20 00:17:46,927 INFO L447 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-11-20 00:17:46,927 INFO L440 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2019-11-20 00:17:46,927 INFO L444 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-20 00:17:46,927 INFO L444 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-11-20 00:17:46,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 12:17:46 BoogieIcfgContainer [2019-11-20 00:17:46,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 00:17:46,930 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 00:17:46,930 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 00:17:46,930 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 00:17:46,930 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:17:12" (3/4) ... [2019-11-20 00:17:46,933 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 00:17:46,941 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-20 00:17:46,945 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 00:17:46,946 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 00:17:46,985 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dc78e168-5463-4208-81c2-a59f1bf2598e/bin/uautomizer/witness.graphml [2019-11-20 00:17:46,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 00:17:46,988 INFO L168 Benchmark]: Toolchain (without parser) took 34680.29 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 621.3 MB). Free memory was 948.8 MB in the beginning and 1.4 GB in the end (delta: -477.6 MB). Peak memory consumption was 143.7 MB. Max. memory is 11.5 GB. [2019-11-20 00:17:46,988 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:17:46,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 185.6 MB). Free memory was 948.8 MB in the beginning and 1.2 GB in the end (delta: -231.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-20 00:17:46,989 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:17:46,989 INFO L168 Benchmark]: Boogie Preprocessor took 18.44 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:17:46,990 INFO L168 Benchmark]: RCFGBuilder took 223.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-20 00:17:46,990 INFO L168 Benchmark]: TraceAbstraction took 33939.82 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 435.7 MB). Free memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: -269.1 MB). Peak memory consumption was 166.6 MB. Max. memory is 11.5 GB. [2019-11-20 00:17:46,990 INFO L168 Benchmark]: Witness Printer took 55.79 ms. Allocated memory is still 1.7 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 11.5 GB. [2019-11-20 00:17:46,993 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 401.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 185.6 MB). Free memory was 948.8 MB in the beginning and 1.2 GB in the end (delta: -231.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.44 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 223.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 33939.82 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 435.7 MB). Free memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: -269.1 MB). Peak memory consumption was 166.6 MB. Max. memory is 11.5 GB. * Witness Printer took 55.79 ms. Allocated memory is still 1.7 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 33.8s, OverallIterations: 27, TraceHistogramMax: 27, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 346 SDtfs, 1217 SDslu, 3985 SDs, 0 SdLazy, 3250 SolverSat, 280 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3881 GetRequests, 3020 SyntacticMatches, 2 SemanticMatches, 859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5551 ImplicationChecksByTransitivity, 14.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 18.4s InterpolantComputationTime, 4689 NumberOfCodeBlocks, 4689 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 4636 ConstructedInterpolants, 0 QuantifiedInterpolants, 1419088 SizeOfPredicates, 377 NumberOfNonLiveVariables, 5512 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 53 InterpolantComputations, 2 PerfectInterpolantSequences, 20956/37908 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...