./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/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 0dad9539bf2db149292212fcb1359717a79b79e5 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:01:54,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:01:54,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:01:54,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:01:54,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:01:54,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:01:54,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:01:54,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:01:54,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:01:54,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:01:54,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:01:54,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:01:54,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:01:54,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:01:54,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:01:54,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:01:54,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:01:54,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:01:54,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:01:54,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:01:54,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:01:54,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:01:54,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:01:54,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:01:54,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:01:54,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:01:54,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:01:54,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:01:54,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:01:54,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:01:54,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:01:54,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:01:54,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:01:54,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:01:54,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:01:54,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:01:54,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:01:54,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:01:54,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:01:54,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:01:54,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:01:54,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:01:54,078 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:01:54,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:01:54,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:01:54,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:01:54,080 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:01:54,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:01:54,080 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:01:54,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:01:54,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:01:54,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:01:54,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:01:54,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:01:54,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:01:54,081 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:01:54,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:01:54,082 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:01:54,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:01:54,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:01:54,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:01:54,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:01:54,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:01:54,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:01:54,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:01:54,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:01:54,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:01:54,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:01:54,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:01:54,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:01:54,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:01:54,083 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_743c345d-bef4-4551-883e-3243897e7a58/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 -> 0dad9539bf2db149292212fcb1359717a79b79e5 [2019-12-07 18:01:54,192 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:01:54,200 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:01:54,202 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:01:54,203 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:01:54,203 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:01:54,204 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/../../sv-benchmarks/c/pthread/stack-1.i [2019-12-07 18:01:54,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/data/8193ef18e/307b22bd4eb242ff8954d1a31e32c428/FLAGd39ae500d [2019-12-07 18:01:54,709 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:01:54,709 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/sv-benchmarks/c/pthread/stack-1.i [2019-12-07 18:01:54,720 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/data/8193ef18e/307b22bd4eb242ff8954d1a31e32c428/FLAGd39ae500d [2019-12-07 18:01:55,224 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/data/8193ef18e/307b22bd4eb242ff8954d1a31e32c428 [2019-12-07 18:01:55,227 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:01:55,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:01:55,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:01:55,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:01:55,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:01:55,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:01:55" (1/1) ... [2019-12-07 18:01:55,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7066884f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55, skipping insertion in model container [2019-12-07 18:01:55,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:01:55" (1/1) ... [2019-12-07 18:01:55,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:01:55,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:01:55,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:01:55,560 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:01:55,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:01:55,671 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:01:55,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55 WrapperNode [2019-12-07 18:01:55,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:01:55,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:01:55,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:01:55,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:01:55,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55" (1/1) ... [2019-12-07 18:01:55,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55" (1/1) ... [2019-12-07 18:01:55,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:01:55,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:01:55,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:01:55,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:01:55,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55" (1/1) ... [2019-12-07 18:01:55,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55" (1/1) ... [2019-12-07 18:01:55,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55" (1/1) ... [2019-12-07 18:01:55,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55" (1/1) ... [2019-12-07 18:01:55,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55" (1/1) ... [2019-12-07 18:01:55,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55" (1/1) ... [2019-12-07 18:01:55,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55" (1/1) ... [2019-12-07 18:01:55,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:01:55,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:01:55,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:01:55,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:01:55,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:01:55,781 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-07 18:01:55,782 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-07 18:01:55,782 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-07 18:01:55,782 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-07 18:01:55,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 18:01:55,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 18:01:55,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 18:01:55,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 18:01:55,783 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2019-12-07 18:01:55,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-12-07 18:01:55,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:01:55,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:01:55,784 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-07 18:01:56,041 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:01:56,042 INFO L287 CfgBuilder]: Removed 22 assume(true) statements. [2019-12-07 18:01:56,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:01:56 BoogieIcfgContainer [2019-12-07 18:01:56,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:01:56,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:01:56,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:01:56,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:01:56,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:01:55" (1/3) ... [2019-12-07 18:01:56,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c20c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:01:56, skipping insertion in model container [2019-12-07 18:01:56,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:01:55" (2/3) ... [2019-12-07 18:01:56,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c20c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:01:56, skipping insertion in model container [2019-12-07 18:01:56,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:01:56" (3/3) ... [2019-12-07 18:01:56,047 INFO L109 eAbstractionObserver]: Analyzing ICFG stack-1.i [2019-12-07 18:01:56,053 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-07 18:01:56,054 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:01:56,058 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-12-07 18:01:56,059 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-07 18:01:56,081 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,081 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,081 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,081 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,081 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,081 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,081 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,081 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,082 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,082 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,082 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,082 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,082 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,082 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,082 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,082 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,082 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,083 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,083 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,083 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,083 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,083 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,083 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,083 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,083 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,083 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,083 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,084 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,084 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,084 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,084 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,084 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,084 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,084 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,084 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,084 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,084 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,085 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,085 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,085 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,085 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,085 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,085 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,085 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,085 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,085 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,086 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,086 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,086 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,086 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,086 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,086 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,086 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,086 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,086 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,087 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,087 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,087 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,087 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,087 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,087 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,087 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,088 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,088 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,088 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,088 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,088 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,088 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,089 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,089 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,089 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,089 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,089 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,089 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,089 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,089 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,090 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,090 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,090 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,090 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,090 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,090 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,090 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~nondet37| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,090 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,090 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,090 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,091 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,091 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,091 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,091 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,091 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,091 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~nondet37| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,091 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,091 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,091 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,091 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,092 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,092 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,092 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,092 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,092 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,092 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,092 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,093 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,093 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,093 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,093 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,093 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,093 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,093 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,093 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,093 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,094 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,094 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,094 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,094 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,094 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:01:56,110 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-12-07 18:01:56,123 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:01:56,123 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:01:56,123 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:01:56,123 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:01:56,123 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:01:56,123 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:01:56,123 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:01:56,123 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:01:56,133 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 137 transitions [2019-12-07 18:01:56,134 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 133 places, 137 transitions [2019-12-07 18:01:56,175 INFO L134 PetriNetUnfolder]: 10/137 cut-off events. [2019-12-07 18:01:56,175 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 18:01:56,182 INFO L76 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 137 events. 10/137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 397 event pairs. 19/145 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2019-12-07 18:01:56,188 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 133 places, 137 transitions [2019-12-07 18:01:56,207 INFO L134 PetriNetUnfolder]: 10/137 cut-off events. [2019-12-07 18:01:56,207 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 18:01:56,209 INFO L76 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 137 events. 10/137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 397 event pairs. 19/145 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2019-12-07 18:01:56,213 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 5224 [2019-12-07 18:01:56,214 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-07 18:01:57,883 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2019-12-07 18:01:58,446 WARN L192 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 121 [2019-12-07 18:01:58,677 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-12-07 18:01:58,686 INFO L206 etLargeBlockEncoding]: Checked pairs total: 7527 [2019-12-07 18:01:58,686 INFO L214 etLargeBlockEncoding]: Total number of compositions: 115 [2019-12-07 18:01:58,689 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 40 transitions [2019-12-07 18:01:58,710 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 331 states. [2019-12-07 18:01:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states. [2019-12-07 18:01:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 18:01:58,716 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:01:58,716 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 18:01:58,716 INFO L410 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:01:58,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:01:58,720 INFO L82 PathProgramCache]: Analyzing trace with hash -729513012, now seen corresponding path program 1 times [2019-12-07 18:01:58,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:01:58,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122387261] [2019-12-07 18:01:58,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:01:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:01:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:01:58,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122387261] [2019-12-07 18:01:58,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:01:58,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 18:01:58,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78117680] [2019-12-07 18:01:58,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 18:01:58,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:01:58,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 18:01:58,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:01:58,872 INFO L87 Difference]: Start difference. First operand 331 states. Second operand 3 states. [2019-12-07 18:01:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:01:58,918 INFO L93 Difference]: Finished difference Result 504 states and 1247 transitions. [2019-12-07 18:01:58,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 18:01:58,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 18:01:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:01:58,932 INFO L225 Difference]: With dead ends: 504 [2019-12-07 18:01:58,932 INFO L226 Difference]: Without dead ends: 460 [2019-12-07 18:01:58,933 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:01:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-07 18:01:58,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 420. [2019-12-07 18:01:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-12-07 18:01:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1095 transitions. [2019-12-07 18:01:58,984 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1095 transitions. Word has length 6 [2019-12-07 18:01:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:01:58,985 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 1095 transitions. [2019-12-07 18:01:58,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 18:01:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1095 transitions. [2019-12-07 18:01:58,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 18:01:58,985 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:01:58,986 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:01:58,986 INFO L410 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:01:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:01:58,986 INFO L82 PathProgramCache]: Analyzing trace with hash 268083260, now seen corresponding path program 1 times [2019-12-07 18:01:58,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:01:58,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828003101] [2019-12-07 18:01:58,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:01:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:01:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:01:59,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828003101] [2019-12-07 18:01:59,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:01:59,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 18:01:59,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997719561] [2019-12-07 18:01:59,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 18:01:59,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:01:59,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 18:01:59,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:01:59,034 INFO L87 Difference]: Start difference. First operand 420 states and 1095 transitions. Second operand 3 states. [2019-12-07 18:01:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:01:59,043 INFO L93 Difference]: Finished difference Result 464 states and 1205 transitions. [2019-12-07 18:01:59,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 18:01:59,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-12-07 18:01:59,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:01:59,047 INFO L225 Difference]: With dead ends: 464 [2019-12-07 18:01:59,047 INFO L226 Difference]: Without dead ends: 464 [2019-12-07 18:01:59,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:01:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-12-07 18:01:59,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2019-12-07 18:01:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-12-07 18:01:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1205 transitions. [2019-12-07 18:01:59,065 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1205 transitions. Word has length 10 [2019-12-07 18:01:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:01:59,065 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 1205 transitions. [2019-12-07 18:01:59,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 18:01:59,065 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1205 transitions. [2019-12-07 18:01:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 18:01:59,066 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:01:59,066 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:01:59,066 INFO L410 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:01:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:01:59,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2125897783, now seen corresponding path program 1 times [2019-12-07 18:01:59,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:01:59,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176998713] [2019-12-07 18:01:59,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:01:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:01:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:01:59,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176998713] [2019-12-07 18:01:59,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921579708] [2019-12-07 18:01:59,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:01:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:01:59,164 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 18:01:59,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:01:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:01:59,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:01:59,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-12-07 18:01:59,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355939298] [2019-12-07 18:01:59,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:01:59,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:01:59,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:01:59,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:01:59,195 INFO L87 Difference]: Start difference. First operand 464 states and 1205 transitions. Second operand 7 states. [2019-12-07 18:01:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:01:59,266 INFO L93 Difference]: Finished difference Result 866 states and 2152 transitions. [2019-12-07 18:01:59,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:01:59,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-12-07 18:01:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:01:59,272 INFO L225 Difference]: With dead ends: 866 [2019-12-07 18:01:59,272 INFO L226 Difference]: Without dead ends: 851 [2019-12-07 18:01:59,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:01:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2019-12-07 18:01:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 575. [2019-12-07 18:01:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2019-12-07 18:01:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1484 transitions. [2019-12-07 18:01:59,293 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1484 transitions. Word has length 13 [2019-12-07 18:01:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:01:59,294 INFO L462 AbstractCegarLoop]: Abstraction has 575 states and 1484 transitions. [2019-12-07 18:01:59,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:01:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1484 transitions. [2019-12-07 18:01:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 18:01:59,295 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:01:59,295 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:01:59,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:01:59,496 INFO L410 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:01:59,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:01:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash -221777397, now seen corresponding path program 1 times [2019-12-07 18:01:59,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:01:59,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777121834] [2019-12-07 18:01:59,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:01:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:01:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:01:59,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777121834] [2019-12-07 18:01:59,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:01:59,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:01:59,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468647798] [2019-12-07 18:01:59,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 18:01:59,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:01:59,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 18:01:59,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:01:59,565 INFO L87 Difference]: Start difference. First operand 575 states and 1484 transitions. Second operand 3 states. [2019-12-07 18:01:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:01:59,591 INFO L93 Difference]: Finished difference Result 304 states and 670 transitions. [2019-12-07 18:01:59,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 18:01:59,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-12-07 18:01:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:01:59,596 INFO L225 Difference]: With dead ends: 304 [2019-12-07 18:01:59,596 INFO L226 Difference]: Without dead ends: 304 [2019-12-07 18:01:59,596 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:01:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-12-07 18:01:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 294. [2019-12-07 18:01:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-12-07 18:01:59,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 643 transitions. [2019-12-07 18:01:59,612 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 643 transitions. Word has length 16 [2019-12-07 18:01:59,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:01:59,613 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 643 transitions. [2019-12-07 18:01:59,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 18:01:59,613 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 643 transitions. [2019-12-07 18:01:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 18:01:59,617 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:01:59,617 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:01:59,618 INFO L410 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:01:59,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:01:59,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2073289252, now seen corresponding path program 1 times [2019-12-07 18:01:59,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:01:59,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135112800] [2019-12-07 18:01:59,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:01:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:01:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:01:59,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135112800] [2019-12-07 18:01:59,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:01:59,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:01:59,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032806007] [2019-12-07 18:01:59,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 18:01:59,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:01:59,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 18:01:59,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:01:59,671 INFO L87 Difference]: Start difference. First operand 294 states and 643 transitions. Second operand 3 states. [2019-12-07 18:01:59,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:01:59,699 INFO L93 Difference]: Finished difference Result 372 states and 811 transitions. [2019-12-07 18:01:59,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 18:01:59,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-12-07 18:01:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:01:59,702 INFO L225 Difference]: With dead ends: 372 [2019-12-07 18:01:59,702 INFO L226 Difference]: Without dead ends: 372 [2019-12-07 18:01:59,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:01:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-12-07 18:01:59,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 295. [2019-12-07 18:01:59,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2019-12-07 18:01:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2019-12-07 18:01:59,711 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 17 [2019-12-07 18:01:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:01:59,712 INFO L462 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2019-12-07 18:01:59,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 18:01:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2019-12-07 18:01:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 18:01:59,714 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:01:59,714 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 18:01:59,714 INFO L410 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:01:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:01:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1682621804, now seen corresponding path program 2 times [2019-12-07 18:01:59,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:01:59,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388128782] [2019-12-07 18:01:59,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:01:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:01:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:01:59,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388128782] [2019-12-07 18:01:59,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944630260] [2019-12-07 18:01:59,777 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:01:59,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:01:59,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:01:59,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:01:59,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:01:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:01:59,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:01:59,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-12-07 18:01:59,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772822170] [2019-12-07 18:01:59,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 18:01:59,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:01:59,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 18:01:59,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:01:59,845 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand 9 states. [2019-12-07 18:01:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:01:59,916 INFO L93 Difference]: Finished difference Result 542 states and 1156 transitions. [2019-12-07 18:01:59,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:01:59,916 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-12-07 18:01:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:01:59,919 INFO L225 Difference]: With dead ends: 542 [2019-12-07 18:01:59,919 INFO L226 Difference]: Without dead ends: 542 [2019-12-07 18:01:59,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:01:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2019-12-07 18:01:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 372. [2019-12-07 18:01:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-12-07 18:01:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 816 transitions. [2019-12-07 18:01:59,927 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 816 transitions. Word has length 20 [2019-12-07 18:01:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:01:59,927 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 816 transitions. [2019-12-07 18:01:59,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 18:01:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 816 transitions. [2019-12-07 18:01:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 18:01:59,928 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:01:59,928 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:02:00,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:00,128 INFO L410 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:02:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:02:00,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1113859110, now seen corresponding path program 1 times [2019-12-07 18:02:00,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:02:00,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530263079] [2019-12-07 18:02:00,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:02:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:02:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:02:00,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530263079] [2019-12-07 18:02:00,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:02:00,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2019-12-07 18:02:00,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135897120] [2019-12-07 18:02:00,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 18:02:00,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:02:00,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 18:02:00,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:02:00,601 INFO L87 Difference]: Start difference. First operand 372 states and 816 transitions. Second operand 17 states. [2019-12-07 18:02:01,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:02:01,402 INFO L93 Difference]: Finished difference Result 586 states and 1242 transitions. [2019-12-07 18:02:01,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 18:02:01,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2019-12-07 18:02:01,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:02:01,407 INFO L225 Difference]: With dead ends: 586 [2019-12-07 18:02:01,407 INFO L226 Difference]: Without dead ends: 529 [2019-12-07 18:02:01,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2019-12-07 18:02:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2019-12-07 18:02:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 408. [2019-12-07 18:02:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2019-12-07 18:02:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 890 transitions. [2019-12-07 18:02:01,420 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 890 transitions. Word has length 21 [2019-12-07 18:02:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:02:01,421 INFO L462 AbstractCegarLoop]: Abstraction has 408 states and 890 transitions. [2019-12-07 18:02:01,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 18:02:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 890 transitions. [2019-12-07 18:02:01,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 18:02:01,422 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:02:01,422 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2019-12-07 18:02:01,422 INFO L410 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:02:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:02:01,423 INFO L82 PathProgramCache]: Analyzing trace with hash -581875049, now seen corresponding path program 3 times [2019-12-07 18:02:01,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:02:01,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481334335] [2019-12-07 18:02:01,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:02:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:02:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:02:01,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481334335] [2019-12-07 18:02:01,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297424178] [2019-12-07 18:02:01,493 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:01,560 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 18:02:01,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:02:01,561 INFO L264 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 18:02:01,562 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:02:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:02:01,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:02:01,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-12-07 18:02:01,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598239080] [2019-12-07 18:02:01,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 18:02:01,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:02:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 18:02:01,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:02:01,578 INFO L87 Difference]: Start difference. First operand 408 states and 890 transitions. Second operand 11 states. [2019-12-07 18:02:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:02:01,653 INFO L93 Difference]: Finished difference Result 686 states and 1454 transitions. [2019-12-07 18:02:01,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:02:01,653 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-12-07 18:02:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:02:01,656 INFO L225 Difference]: With dead ends: 686 [2019-12-07 18:02:01,656 INFO L226 Difference]: Without dead ends: 686 [2019-12-07 18:02:01,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:02:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2019-12-07 18:02:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 485. [2019-12-07 18:02:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2019-12-07 18:02:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1059 transitions. [2019-12-07 18:02:01,665 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1059 transitions. Word has length 27 [2019-12-07 18:02:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:02:01,665 INFO L462 AbstractCegarLoop]: Abstraction has 485 states and 1059 transitions. [2019-12-07 18:02:01,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 18:02:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1059 transitions. [2019-12-07 18:02:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 18:02:01,666 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:02:01,666 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:02:01,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:01,867 INFO L410 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:02:01,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:02:01,867 INFO L82 PathProgramCache]: Analyzing trace with hash 485601655, now seen corresponding path program 2 times [2019-12-07 18:02:01,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:02:01,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981538822] [2019-12-07 18:02:01,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:02:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:02:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:02:02,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981538822] [2019-12-07 18:02:02,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539339291] [2019-12-07 18:02:02,224 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:02,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 18:02:02,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:02:02,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-07 18:02:02,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:02:02,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:02,411 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-12-07 18:02:02,412 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:02:02,420 INFO L614 ElimStorePlain]: treesize reduction 5, result has 79.2 percent of original size [2019-12-07 18:02:02,420 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:02,420 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2019-12-07 18:02:02,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:02,793 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 23 [2019-12-07 18:02:02,793 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:02,808 INFO L614 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2019-12-07 18:02:02,809 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2019-12-07 18:02:02,810 INFO L534 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:02,815 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:02:02,815 INFO L534 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:02,815 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:109, output treesize:16 [2019-12-07 18:02:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:02:02,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:02:02,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 27 [2019-12-07 18:02:02,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803593375] [2019-12-07 18:02:02,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 18:02:02,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:02:02,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 18:02:02,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2019-12-07 18:02:02,860 INFO L87 Difference]: Start difference. First operand 485 states and 1059 transitions. Second operand 14 states. [2019-12-07 18:02:07,724 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-12-07 18:02:12,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:02:12,865 INFO L93 Difference]: Finished difference Result 802 states and 1724 transitions. [2019-12-07 18:02:12,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 18:02:12,866 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2019-12-07 18:02:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:02:12,869 INFO L225 Difference]: With dead ends: 802 [2019-12-07 18:02:12,869 INFO L226 Difference]: Without dead ends: 802 [2019-12-07 18:02:12,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=234, Invalid=1928, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 18:02:12,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2019-12-07 18:02:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 549. [2019-12-07 18:02:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2019-12-07 18:02:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1205 transitions. [2019-12-07 18:02:12,879 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1205 transitions. Word has length 28 [2019-12-07 18:02:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:02:12,879 INFO L462 AbstractCegarLoop]: Abstraction has 549 states and 1205 transitions. [2019-12-07 18:02:12,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 18:02:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1205 transitions. [2019-12-07 18:02:12,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 18:02:12,880 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:02:12,881 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:02:13,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:13,084 INFO L410 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:02:13,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:02:13,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1110098162, now seen corresponding path program 1 times [2019-12-07 18:02:13,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:02:13,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21909773] [2019-12-07 18:02:13,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:02:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:02:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:02:13,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21909773] [2019-12-07 18:02:13,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507631042] [2019-12-07 18:02:13,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:02:13,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 18:02:13,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:02:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:02:13,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:02:13,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-12-07 18:02:13,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087377813] [2019-12-07 18:02:13,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:02:13,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:02:13,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:02:13,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:02:13,225 INFO L87 Difference]: Start difference. First operand 549 states and 1205 transitions. Second operand 10 states. [2019-12-07 18:02:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:02:13,313 INFO L93 Difference]: Finished difference Result 839 states and 1785 transitions. [2019-12-07 18:02:13,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:02:13,313 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-12-07 18:02:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:02:13,317 INFO L225 Difference]: With dead ends: 839 [2019-12-07 18:02:13,318 INFO L226 Difference]: Without dead ends: 839 [2019-12-07 18:02:13,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:02:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-12-07 18:02:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 593. [2019-12-07 18:02:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2019-12-07 18:02:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1329 transitions. [2019-12-07 18:02:13,332 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1329 transitions. Word has length 31 [2019-12-07 18:02:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:02:13,332 INFO L462 AbstractCegarLoop]: Abstraction has 593 states and 1329 transitions. [2019-12-07 18:02:13,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:02:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1329 transitions. [2019-12-07 18:02:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 18:02:13,333 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:02:13,334 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2019-12-07 18:02:13,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:13,534 INFO L410 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:02:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:02:13,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1062359284, now seen corresponding path program 4 times [2019-12-07 18:02:13,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:02:13,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122482904] [2019-12-07 18:02:13,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:02:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:02:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:02:13,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122482904] [2019-12-07 18:02:13,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802850104] [2019-12-07 18:02:13,667 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:13,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:02:13,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:02:13,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 18:02:13,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:02:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:02:13,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:02:13,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2019-12-07 18:02:13,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040218665] [2019-12-07 18:02:13,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 18:02:13,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:02:13,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 18:02:13,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:02:13,756 INFO L87 Difference]: Start difference. First operand 593 states and 1329 transitions. Second operand 13 states. [2019-12-07 18:02:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:02:13,884 INFO L93 Difference]: Finished difference Result 946 states and 2034 transitions. [2019-12-07 18:02:13,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:02:13,884 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2019-12-07 18:02:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:02:13,888 INFO L225 Difference]: With dead ends: 946 [2019-12-07 18:02:13,888 INFO L226 Difference]: Without dead ends: 946 [2019-12-07 18:02:13,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:02:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2019-12-07 18:02:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 670. [2019-12-07 18:02:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2019-12-07 18:02:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1498 transitions. [2019-12-07 18:02:13,899 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1498 transitions. Word has length 34 [2019-12-07 18:02:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:02:13,899 INFO L462 AbstractCegarLoop]: Abstraction has 670 states and 1498 transitions. [2019-12-07 18:02:13,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 18:02:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1498 transitions. [2019-12-07 18:02:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 18:02:13,900 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:02:13,900 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:02:14,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:14,101 INFO L410 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:02:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:02:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1591752392, now seen corresponding path program 1 times [2019-12-07 18:02:14,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:02:14,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671752893] [2019-12-07 18:02:14,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:02:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:02:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:02:14,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671752893] [2019-12-07 18:02:14,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424098232] [2019-12-07 18:02:14,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:02:14,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 54 conjunts are in the unsatisfiable core [2019-12-07 18:02:14,564 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:02:14,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:14,695 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-12-07 18:02:14,695 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:02:14,705 INFO L614 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2019-12-07 18:02:14,705 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:14,705 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:22 [2019-12-07 18:02:14,949 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:02:14,950 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 64 [2019-12-07 18:02:14,950 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:02:14,977 INFO L614 ElimStorePlain]: treesize reduction 24, result has 70.0 percent of original size [2019-12-07 18:02:14,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:14,982 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-12-07 18:02:14,982 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:48, output treesize:35 [2019-12-07 18:02:15,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:15,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:15,156 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:15,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:15,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:15,478 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:02:15,478 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2019-12-07 18:02:15,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:15,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:15,479 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:15,505 INFO L614 ElimStorePlain]: treesize reduction 77, result has 26.0 percent of original size [2019-12-07 18:02:15,505 INFO L502 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2019-12-07 18:02:15,506 INFO L534 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:15,506 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 12 variables, input treesize:115, output treesize:11 [2019-12-07 18:02:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:02:15,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:02:15,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2019-12-07 18:02:15,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112003671] [2019-12-07 18:02:15,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-07 18:02:15,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:02:15,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-07 18:02:15,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 18:02:15,559 INFO L87 Difference]: Start difference. First operand 670 states and 1498 transitions. Second operand 40 states. [2019-12-07 18:02:20,182 WARN L192 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2019-12-07 18:02:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:02:37,631 INFO L93 Difference]: Finished difference Result 2201 states and 4674 transitions. [2019-12-07 18:02:37,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-12-07 18:02:37,632 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 36 [2019-12-07 18:02:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:02:37,639 INFO L225 Difference]: With dead ends: 2201 [2019-12-07 18:02:37,639 INFO L226 Difference]: Without dead ends: 1889 [2019-12-07 18:02:37,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3286 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=1378, Invalid=9960, Unknown=4, NotChecked=0, Total=11342 [2019-12-07 18:02:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2019-12-07 18:02:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 856. [2019-12-07 18:02:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2019-12-07 18:02:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1917 transitions. [2019-12-07 18:02:37,660 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1917 transitions. Word has length 36 [2019-12-07 18:02:37,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:02:37,660 INFO L462 AbstractCegarLoop]: Abstraction has 856 states and 1917 transitions. [2019-12-07 18:02:37,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-07 18:02:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1917 transitions. [2019-12-07 18:02:37,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-07 18:02:37,662 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:02:37,662 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:02:37,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:37,863 INFO L410 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:02:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:02:37,863 INFO L82 PathProgramCache]: Analyzing trace with hash -734267825, now seen corresponding path program 2 times [2019-12-07 18:02:37,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:02:37,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729519138] [2019-12-07 18:02:37,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:02:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:02:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:02:37,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729519138] [2019-12-07 18:02:37,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5773839] [2019-12-07 18:02:37,931 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:37,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:02:37,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:02:38,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 18:02:38,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:02:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:02:38,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:02:38,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-12-07 18:02:38,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984279640] [2019-12-07 18:02:38,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:02:38,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:02:38,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:02:38,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:02:38,016 INFO L87 Difference]: Start difference. First operand 856 states and 1917 transitions. Second operand 12 states. [2019-12-07 18:02:38,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:02:38,119 INFO L93 Difference]: Finished difference Result 1357 states and 2912 transitions. [2019-12-07 18:02:38,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 18:02:38,119 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2019-12-07 18:02:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:02:38,124 INFO L225 Difference]: With dead ends: 1357 [2019-12-07 18:02:38,124 INFO L226 Difference]: Without dead ends: 1357 [2019-12-07 18:02:38,125 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-12-07 18:02:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2019-12-07 18:02:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 856. [2019-12-07 18:02:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2019-12-07 18:02:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1917 transitions. [2019-12-07 18:02:38,138 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1917 transitions. Word has length 38 [2019-12-07 18:02:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:02:38,138 INFO L462 AbstractCegarLoop]: Abstraction has 856 states and 1917 transitions. [2019-12-07 18:02:38,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:02:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1917 transitions. [2019-12-07 18:02:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-07 18:02:38,139 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:02:38,139 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2019-12-07 18:02:38,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:38,340 INFO L410 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:02:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:02:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash 222448887, now seen corresponding path program 5 times [2019-12-07 18:02:38,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:02:38,341 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10118126] [2019-12-07 18:02:38,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:02:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:02:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:02:38,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10118126] [2019-12-07 18:02:38,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863336437] [2019-12-07 18:02:38,391 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:38,473 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 18:02:38,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:02:38,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 18:02:38,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:02:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:02:38,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:02:38,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2019-12-07 18:02:38,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060365669] [2019-12-07 18:02:38,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:02:38,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:02:38,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:02:38,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:02:38,484 INFO L87 Difference]: Start difference. First operand 856 states and 1917 transitions. Second operand 8 states. [2019-12-07 18:02:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:02:38,509 INFO L93 Difference]: Finished difference Result 2059 states and 4411 transitions. [2019-12-07 18:02:38,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 18:02:38,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-12-07 18:02:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:02:38,514 INFO L225 Difference]: With dead ends: 2059 [2019-12-07 18:02:38,514 INFO L226 Difference]: Without dead ends: 1037 [2019-12-07 18:02:38,514 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:02:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2019-12-07 18:02:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 845. [2019-12-07 18:02:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 845 states. [2019-12-07 18:02:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1712 transitions. [2019-12-07 18:02:38,529 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1712 transitions. Word has length 41 [2019-12-07 18:02:38,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:02:38,530 INFO L462 AbstractCegarLoop]: Abstraction has 845 states and 1712 transitions. [2019-12-07 18:02:38,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:02:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1712 transitions. [2019-12-07 18:02:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-07 18:02:38,532 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:02:38,532 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:02:38,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:38,732 INFO L410 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:02:38,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:02:38,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2130367371, now seen corresponding path program 2 times [2019-12-07 18:02:38,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:02:38,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579920454] [2019-12-07 18:02:38,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:02:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:02:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:02:39,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579920454] [2019-12-07 18:02:39,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131999484] [2019-12-07 18:02:39,256 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:02:39,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:02:39,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:02:39,318 INFO L264 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 58 conjunts are in the unsatisfiable core [2019-12-07 18:02:39,319 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:02:39,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:39,433 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-12-07 18:02:39,434 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:02:39,441 INFO L614 ElimStorePlain]: treesize reduction 5, result has 79.2 percent of original size [2019-12-07 18:02:39,441 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:39,441 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2019-12-07 18:02:39,686 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:02:39,687 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2019-12-07 18:02:39,687 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:02:39,694 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:02:39,695 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:39,695 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:20 [2019-12-07 18:02:40,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:02:40,192 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 23 [2019-12-07 18:02:40,193 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:40,206 INFO L614 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2019-12-07 18:02:40,208 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2019-12-07 18:02:40,208 INFO L534 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:40,212 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:02:40,213 INFO L534 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:02:40,213 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:109, output treesize:16 [2019-12-07 18:02:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:02:40,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:02:40,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2019-12-07 18:02:40,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558360202] [2019-12-07 18:02:40,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-07 18:02:40,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:02:40,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-07 18:02:40,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 18:02:40,285 INFO L87 Difference]: Start difference. First operand 845 states and 1712 transitions. Second operand 38 states. [2019-12-07 18:02:47,211 WARN L192 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-12-07 18:02:49,399 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2019-12-07 18:02:51,424 WARN L192 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 40 [2019-12-07 18:02:54,089 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2019-12-07 18:03:02,800 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2019-12-07 18:03:04,190 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2019-12-07 18:03:04,972 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2019-12-07 18:03:07,131 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2019-12-07 18:03:09,227 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2019-12-07 18:03:12,862 WARN L192 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2019-12-07 18:03:13,281 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2019-12-07 18:03:15,531 WARN L192 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-12-07 18:03:18,010 WARN L192 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-12-07 18:03:18,251 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2019-12-07 18:03:20,849 WARN L192 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2019-12-07 18:03:27,460 WARN L192 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2019-12-07 18:03:29,964 WARN L192 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2019-12-07 18:03:30,628 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2019-12-07 18:03:35,127 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2019-12-07 18:03:35,591 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2019-12-07 18:03:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:03:41,779 INFO L93 Difference]: Finished difference Result 1860 states and 3759 transitions. [2019-12-07 18:03:41,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-12-07 18:03:41,781 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2019-12-07 18:03:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:03:41,787 INFO L225 Difference]: With dead ends: 1860 [2019-12-07 18:03:41,787 INFO L226 Difference]: Without dead ends: 1760 [2019-12-07 18:03:41,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5040 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=1725, Invalid=15303, Unknown=2, NotChecked=0, Total=17030 [2019-12-07 18:03:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2019-12-07 18:03:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1003. [2019-12-07 18:03:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2019-12-07 18:03:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 2059 transitions. [2019-12-07 18:03:41,806 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 2059 transitions. Word has length 43 [2019-12-07 18:03:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:03:41,806 INFO L462 AbstractCegarLoop]: Abstraction has 1003 states and 2059 transitions. [2019-12-07 18:03:41,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-07 18:03:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 2059 transitions. [2019-12-07 18:03:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 18:03:41,807 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:03:41,807 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:03:42,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:03:42,008 INFO L410 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:03:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:03:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1478651474, now seen corresponding path program 3 times [2019-12-07 18:03:42,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:03:42,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931942465] [2019-12-07 18:03:42,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:03:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:03:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:03:42,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931942465] [2019-12-07 18:03:42,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310171506] [2019-12-07 18:03:42,107 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:03:42,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 18:03:42,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:03:42,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 18:03:42,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:03:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-12-07 18:03:42,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:03:42,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2019-12-07 18:03:42,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891332203] [2019-12-07 18:03:42,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:03:42,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:03:42,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:03:42,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:03:42,196 INFO L87 Difference]: Start difference. First operand 1003 states and 2059 transitions. Second operand 6 states. [2019-12-07 18:03:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:03:42,265 INFO L93 Difference]: Finished difference Result 1261 states and 2552 transitions. [2019-12-07 18:03:42,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 18:03:42,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-12-07 18:03:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:03:42,270 INFO L225 Difference]: With dead ends: 1261 [2019-12-07 18:03:42,270 INFO L226 Difference]: Without dead ends: 1251 [2019-12-07 18:03:42,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2019-12-07 18:03:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-12-07 18:03:42,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 999. [2019-12-07 18:03:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2019-12-07 18:03:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 2043 transitions. [2019-12-07 18:03:42,282 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 2043 transitions. Word has length 45 [2019-12-07 18:03:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:03:42,282 INFO L462 AbstractCegarLoop]: Abstraction has 999 states and 2043 transitions. [2019-12-07 18:03:42,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:03:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 2043 transitions. [2019-12-07 18:03:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 18:03:42,283 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:03:42,283 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:03:42,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:03:42,484 INFO L410 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:03:42,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:03:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash 917951124, now seen corresponding path program 4 times [2019-12-07 18:03:42,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:03:42,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576521864] [2019-12-07 18:03:42,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:03:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:03:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:03:42,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576521864] [2019-12-07 18:03:42,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930879906] [2019-12-07 18:03:42,574 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:03:42,633 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:03:42,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:03:42,634 INFO L264 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 18:03:42,635 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:03:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 18:03:42,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:03:42,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2019-12-07 18:03:42,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123127218] [2019-12-07 18:03:42,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:03:42,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:03:42,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:03:42,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:03:42,640 INFO L87 Difference]: Start difference. First operand 999 states and 2043 transitions. Second operand 12 states. [2019-12-07 18:03:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:03:42,723 INFO L93 Difference]: Finished difference Result 1147 states and 2297 transitions. [2019-12-07 18:03:42,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 18:03:42,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-12-07 18:03:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:03:42,727 INFO L225 Difference]: With dead ends: 1147 [2019-12-07 18:03:42,727 INFO L226 Difference]: Without dead ends: 1032 [2019-12-07 18:03:42,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:03:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2019-12-07 18:03:42,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 876. [2019-12-07 18:03:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2019-12-07 18:03:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1771 transitions. [2019-12-07 18:03:42,737 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1771 transitions. Word has length 45 [2019-12-07 18:03:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:03:42,737 INFO L462 AbstractCegarLoop]: Abstraction has 876 states and 1771 transitions. [2019-12-07 18:03:42,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:03:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1771 transitions. [2019-12-07 18:03:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 18:03:42,738 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:03:42,738 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:03:42,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:03:42,939 INFO L410 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:03:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:03:42,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1409287388, now seen corresponding path program 3 times [2019-12-07 18:03:42,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:03:42,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598302380] [2019-12-07 18:03:42,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:03:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:03:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:03:43,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598302380] [2019-12-07 18:03:43,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407134330] [2019-12-07 18:03:43,862 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:03:43,939 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 18:03:43,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:03:43,941 INFO L264 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 75 conjunts are in the unsatisfiable core [2019-12-07 18:03:43,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:03:43,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:03:44,070 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-12-07 18:03:44,071 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:03:44,078 INFO L614 ElimStorePlain]: treesize reduction 5, result has 79.2 percent of original size [2019-12-07 18:03:44,079 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:03:44,079 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2019-12-07 18:03:44,385 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:03:44,385 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2019-12-07 18:03:44,386 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:03:44,394 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:03:44,395 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:03:44,395 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:20 [2019-12-07 18:03:44,642 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:03:44,642 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2019-12-07 18:03:44,642 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:03:44,650 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:03:44,651 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:03:44,651 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:20 [2019-12-07 18:03:45,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:03:45,339 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 21 [2019-12-07 18:03:45,339 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:03:45,352 INFO L614 ElimStorePlain]: treesize reduction 61, result has 20.8 percent of original size [2019-12-07 18:03:45,352 INFO L502 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2019-12-07 18:03:45,352 INFO L534 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:03:45,353 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:109, output treesize:16 [2019-12-07 18:03:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:03:45,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:03:45,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 46 [2019-12-07 18:03:45,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51923553] [2019-12-07 18:03:45,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-12-07 18:03:45,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:03:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-12-07 18:03:45,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2023, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 18:03:45,441 INFO L87 Difference]: Start difference. First operand 876 states and 1771 transitions. Second operand 47 states. [2019-12-07 18:04:03,981 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-12-07 18:04:05,108 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2019-12-07 18:04:18,663 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2019-12-07 18:04:19,391 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2019-12-07 18:04:21,866 WARN L192 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2019-12-07 18:04:27,022 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2019-12-07 18:04:30,845 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2019-12-07 18:04:38,840 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-12-07 18:04:44,545 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2019-12-07 18:04:48,813 WARN L192 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2019-12-07 18:04:50,016 WARN L192 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-12-07 18:04:50,632 WARN L192 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2019-12-07 18:04:53,206 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2019-12-07 18:05:00,177 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2019-12-07 18:05:01,178 WARN L192 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2019-12-07 18:05:01,501 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2019-12-07 18:05:01,900 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2019-12-07 18:05:07,720 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2019-12-07 18:05:10,417 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2019-12-07 18:05:10,683 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2019-12-07 18:05:15,486 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2019-12-07 18:05:17,588 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2019-12-07 18:05:21,198 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2019-12-07 18:05:21,535 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2019-12-07 18:05:24,882 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2019-12-07 18:05:26,451 WARN L192 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-12-07 18:05:27,361 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2019-12-07 18:05:33,071 WARN L192 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2019-12-07 18:05:34,604 WARN L192 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-12-07 18:05:47,827 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2019-12-07 18:05:48,180 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2019-12-07 18:05:48,769 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2019-12-07 18:05:49,741 WARN L192 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2019-12-07 18:05:50,129 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2019-12-07 18:05:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:05:54,264 INFO L93 Difference]: Finished difference Result 1920 states and 3829 transitions. [2019-12-07 18:05:54,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-12-07 18:05:54,264 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 51 [2019-12-07 18:05:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:05:54,268 INFO L225 Difference]: With dead ends: 1920 [2019-12-07 18:05:54,268 INFO L226 Difference]: Without dead ends: 1025 [2019-12-07 18:05:54,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6607 ImplicationChecksByTransitivity, 60.3s TimeCoverageRelationStatistics Valid=1994, Invalid=19752, Unknown=10, NotChecked=0, Total=21756 [2019-12-07 18:05:54,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2019-12-07 18:05:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 685. [2019-12-07 18:05:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-12-07 18:05:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1377 transitions. [2019-12-07 18:05:54,282 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1377 transitions. Word has length 51 [2019-12-07 18:05:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:05:54,283 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1377 transitions. [2019-12-07 18:05:54,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-12-07 18:05:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1377 transitions. [2019-12-07 18:05:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-12-07 18:05:54,283 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:05:54,283 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:05:54,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:05:54,484 INFO L410 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:05:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:05:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash -709149855, now seen corresponding path program 5 times [2019-12-07 18:05:54,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:05:54,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104509117] [2019-12-07 18:05:54,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:05:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:05:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:05:54,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104509117] [2019-12-07 18:05:54,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309208276] [2019-12-07 18:05:54,583 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:05:54,685 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-07 18:05:54,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:05:54,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 18:05:54,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:05:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:05:54,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:05:54,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2019-12-07 18:05:54,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156468361] [2019-12-07 18:05:54,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 18:05:54,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:05:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 18:05:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:05:54,709 INFO L87 Difference]: Start difference. First operand 685 states and 1377 transitions. Second operand 15 states. [2019-12-07 18:05:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:05:54,828 INFO L93 Difference]: Finished difference Result 1044 states and 2036 transitions. [2019-12-07 18:05:54,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 18:05:54,829 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2019-12-07 18:05:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:05:54,833 INFO L225 Difference]: With dead ends: 1044 [2019-12-07 18:05:54,833 INFO L226 Difference]: Without dead ends: 1034 [2019-12-07 18:05:54,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2019-12-07 18:05:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2019-12-07 18:05:54,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 659. [2019-12-07 18:05:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 659 states. [2019-12-07 18:05:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1317 transitions. [2019-12-07 18:05:54,841 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1317 transitions. Word has length 53 [2019-12-07 18:05:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:05:54,842 INFO L462 AbstractCegarLoop]: Abstraction has 659 states and 1317 transitions. [2019-12-07 18:05:54,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 18:05:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1317 transitions. [2019-12-07 18:05:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-12-07 18:05:54,842 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:05:54,843 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:05:55,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:05:55,043 INFO L410 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:05:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:05:55,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1984945800, now seen corresponding path program 4 times [2019-12-07 18:05:55,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:05:55,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622776107] [2019-12-07 18:05:55,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:05:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:05:56,137 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2019-12-07 18:05:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:05:57,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622776107] [2019-12-07 18:05:57,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96260855] [2019-12-07 18:05:57,326 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:05:57,400 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:05:57,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:05:57,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 83 conjunts are in the unsatisfiable core [2019-12-07 18:05:57,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:05:57,408 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2019-12-07 18:05:57,409 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 18:05:57,434 INFO L614 ElimStorePlain]: treesize reduction 29, result has 42.0 percent of original size [2019-12-07 18:05:57,434 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:05:57,434 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:23, output treesize:4 [2019-12-07 18:05:57,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:05:57,649 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-12-07 18:05:57,649 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:05:57,658 INFO L614 ElimStorePlain]: treesize reduction 5, result has 82.1 percent of original size [2019-12-07 18:05:57,658 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:05:57,658 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2019-12-07 18:05:57,999 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:05:58,000 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2019-12-07 18:05:58,000 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:05:58,010 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:05:58,010 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:05:58,011 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:24 [2019-12-07 18:05:58,513 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:05:58,514 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2019-12-07 18:05:58,514 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:05:58,523 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:05:58,524 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:05:58,524 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:24 [2019-12-07 18:05:58,611 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2019-12-07 18:05:58,611 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:05:58,618 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:05:58,618 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 18:05:58,618 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2019-12-07 18:05:59,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:05:59,927 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 19 [2019-12-07 18:05:59,927 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:05:59,930 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 21 [2019-12-07 18:05:59,930 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 18:05:59,942 INFO L614 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2019-12-07 18:05:59,943 INFO L534 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:05:59,943 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:11 [2019-12-07 18:06:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-07 18:06:00,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:06:00,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 27] total 60 [2019-12-07 18:06:00,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12421066] [2019-12-07 18:06:00,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-12-07 18:06:00,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:06:00,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-12-07 18:06:00,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3623, Unknown=0, NotChecked=0, Total=3782 [2019-12-07 18:06:00,107 INFO L87 Difference]: Start difference. First operand 659 states and 1317 transitions. Second operand 62 states. [2019-12-07 18:06:07,298 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2019-12-07 18:06:09,075 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2019-12-07 18:06:16,049 WARN L192 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-12-07 18:06:17,315 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2019-12-07 18:06:17,992 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 82 [2019-12-07 18:06:18,576 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2019-12-07 18:06:25,492 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2019-12-07 18:06:26,014 WARN L192 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2019-12-07 18:06:27,052 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2019-12-07 18:06:27,403 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2019-12-07 18:06:27,655 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-12-07 18:06:28,295 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2019-12-07 18:06:29,192 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2019-12-07 18:06:30,149 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 74 [2019-12-07 18:06:30,657 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2019-12-07 18:06:30,966 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2019-12-07 18:06:31,690 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2019-12-07 18:06:32,518 WARN L192 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 96 [2019-12-07 18:06:32,889 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2019-12-07 18:06:37,021 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2019-12-07 18:06:38,329 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2019-12-07 18:06:40,441 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2019-12-07 18:06:41,121 WARN L192 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2019-12-07 18:06:41,604 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2019-12-07 18:06:43,933 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2019-12-07 18:06:45,653 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2019-12-07 18:06:49,060 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 64 [2019-12-07 18:06:49,772 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2019-12-07 18:06:50,064 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2019-12-07 18:06:53,092 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 57 [2019-12-07 18:06:53,394 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2019-12-07 18:06:54,878 WARN L192 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 117 DAG size of output: 75 [2019-12-07 18:06:55,370 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 69 [2019-12-07 18:06:55,914 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 76 [2019-12-07 18:06:56,213 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2019-12-07 18:06:57,159 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2019-12-07 18:06:58,191 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 80 [2019-12-07 18:06:58,693 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2019-12-07 18:06:59,673 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-12-07 18:07:00,491 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 81 [2019-12-07 18:07:01,782 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2019-12-07 18:07:06,994 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2019-12-07 18:07:07,874 WARN L192 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2019-12-07 18:07:08,590 WARN L192 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 95 [2019-12-07 18:07:09,119 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-12-07 18:07:09,640 WARN L192 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2019-12-07 18:07:10,082 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2019-12-07 18:07:11,486 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 92 [2019-12-07 18:07:12,826 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2019-12-07 18:07:17,099 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 71 [2019-12-07 18:07:18,479 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2019-12-07 18:07:19,332 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2019-12-07 18:07:22,721 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 76 [2019-12-07 18:07:23,187 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 90 [2019-12-07 18:07:26,301 WARN L192 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 86 [2019-12-07 18:07:27,570 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2019-12-07 18:07:28,440 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2019-12-07 18:07:28,849 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2019-12-07 18:07:29,406 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2019-12-07 18:07:31,275 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2019-12-07 18:07:31,913 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2019-12-07 18:07:32,602 WARN L192 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 97 [2019-12-07 18:07:33,054 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2019-12-07 18:07:34,053 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 86 [2019-12-07 18:07:34,446 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2019-12-07 18:07:35,720 WARN L192 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 86 [2019-12-07 18:07:36,560 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 84 [2019-12-07 18:07:39,032 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2019-12-07 18:07:39,429 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2019-12-07 18:07:39,953 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2019-12-07 18:07:42,413 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2019-12-07 18:07:42,791 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-12-07 18:07:48,705 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2019-12-07 18:07:49,436 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 71 [2019-12-07 18:07:51,757 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 72 [2019-12-07 18:07:52,182 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2019-12-07 18:07:52,844 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2019-12-07 18:07:55,774 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2019-12-07 18:07:58,475 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2019-12-07 18:07:59,245 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 82 [2019-12-07 18:08:01,740 WARN L192 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 83 [2019-12-07 18:08:07,610 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2019-12-07 18:08:08,167 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2019-12-07 18:08:08,597 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-12-07 18:08:08,917 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2019-12-07 18:08:10,095 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2019-12-07 18:08:11,133 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2019-12-07 18:08:13,759 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2019-12-07 18:08:16,044 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2019-12-07 18:08:16,335 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2019-12-07 18:08:20,745 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2019-12-07 18:08:26,621 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2019-12-07 18:08:27,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:08:27,017 INFO L93 Difference]: Finished difference Result 2456 states and 4832 transitions. [2019-12-07 18:08:27,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2019-12-07 18:08:27,018 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 65 [2019-12-07 18:08:27,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:08:27,027 INFO L225 Difference]: With dead ends: 2456 [2019-12-07 18:08:27,027 INFO L226 Difference]: Without dead ends: 2456 [2019-12-07 18:08:27,029 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19382 ImplicationChecksByTransitivity, 96.7s TimeCoverageRelationStatistics Valid=4976, Invalid=56768, Unknown=8, NotChecked=0, Total=61752 [2019-12-07 18:08:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2019-12-07 18:08:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 644. [2019-12-07 18:08:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2019-12-07 18:08:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1286 transitions. [2019-12-07 18:08:27,043 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1286 transitions. Word has length 65 [2019-12-07 18:08:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:08:27,043 INFO L462 AbstractCegarLoop]: Abstraction has 644 states and 1286 transitions. [2019-12-07 18:08:27,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-12-07 18:08:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1286 transitions. [2019-12-07 18:08:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-12-07 18:08:27,044 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:08:27,044 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:08:27,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:08:27,245 INFO L410 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:08:27,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:08:27,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1580135158, now seen corresponding path program 5 times [2019-12-07 18:08:27,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:08:27,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94332885] [2019-12-07 18:08:27,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:08:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:08:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:08:28,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94332885] [2019-12-07 18:08:28,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181098603] [2019-12-07 18:08:28,039 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:08:28,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-07 18:08:28,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:08:28,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 109 conjunts are in the unsatisfiable core [2019-12-07 18:08:28,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:08:28,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:08:28,154 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 18:08:28,154 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:08:28,160 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:28,161 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:08:28,161 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2019-12-07 18:08:28,285 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:08:28,286 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2019-12-07 18:08:28,287 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:08:28,307 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:28,307 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:08:28,307 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:26 [2019-12-07 18:08:28,498 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:08:28,499 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2019-12-07 18:08:28,499 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:08:28,523 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:28,523 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:08:28,524 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:26 [2019-12-07 18:08:28,661 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:08:28,662 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2019-12-07 18:08:28,663 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:08:28,677 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:28,678 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:08:28,678 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:26 [2019-12-07 18:08:28,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:08:28,853 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:08:28,854 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:08:28,854 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2019-12-07 18:08:28,854 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:08:28,857 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:08:28,858 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:28,858 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2019-12-07 18:08:28,858 INFO L534 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:08:28,876 INFO L614 ElimStorePlain]: treesize reduction 31, result has 36.7 percent of original size [2019-12-07 18:08:28,876 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:08:28,876 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:12 [2019-12-07 18:08:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:08:28,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:08:28,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 39 [2019-12-07 18:08:28,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812347041] [2019-12-07 18:08:28,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-07 18:08:28,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:08:28,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-07 18:08:28,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 18:08:28,961 INFO L87 Difference]: Start difference. First operand 644 states and 1286 transitions. Second operand 41 states. [2019-12-07 18:08:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:08:33,106 INFO L93 Difference]: Finished difference Result 1047 states and 2036 transitions. [2019-12-07 18:08:33,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-12-07 18:08:33,106 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 66 [2019-12-07 18:08:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:08:33,109 INFO L225 Difference]: With dead ends: 1047 [2019-12-07 18:08:33,109 INFO L226 Difference]: Without dead ends: 618 [2019-12-07 18:08:33,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=810, Invalid=6330, Unknown=0, NotChecked=0, Total=7140 [2019-12-07 18:08:33,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-12-07 18:08:33,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 598. [2019-12-07 18:08:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-12-07 18:08:33,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1141 transitions. [2019-12-07 18:08:33,117 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1141 transitions. Word has length 66 [2019-12-07 18:08:33,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:08:33,117 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 1141 transitions. [2019-12-07 18:08:33,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-07 18:08:33,117 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1141 transitions. [2019-12-07 18:08:33,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-12-07 18:08:33,118 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:08:33,118 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:08:33,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:08:33,319 INFO L410 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:08:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:08:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash -540855667, now seen corresponding path program 6 times [2019-12-07 18:08:33,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:08:33,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493058391] [2019-12-07 18:08:33,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:08:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:08:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:08:34,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493058391] [2019-12-07 18:08:34,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875491279] [2019-12-07 18:08:34,276 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/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 [2019-12-07 18:08:34,401 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-07 18:08:34,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:08:34,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 100 conjunts are in the unsatisfiable core [2019-12-07 18:08:34,405 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:08:34,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:08:34,443 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 18:08:34,443 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:08:34,449 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:34,450 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:08:34,450 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2019-12-07 18:08:34,554 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:08:34,555 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2019-12-07 18:08:34,555 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:08:34,565 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:34,566 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:08:34,566 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:24 [2019-12-07 18:08:34,668 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:08:34,669 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2019-12-07 18:08:34,669 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:08:34,679 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:34,679 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:08:34,679 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:26 [2019-12-07 18:08:34,796 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:08:34,796 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2019-12-07 18:08:34,796 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:08:34,807 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:34,807 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:08:34,807 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:24 [2019-12-07 18:08:34,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:08:34,892 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:08:34,892 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:08:34,893 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2019-12-07 18:08:34,893 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:08:34,896 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:08:34,897 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:34,897 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2019-12-07 18:08:34,897 INFO L534 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:08:34,915 INFO L614 ElimStorePlain]: treesize reduction 31, result has 36.7 percent of original size [2019-12-07 18:08:34,916 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:08:34,916 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:12 [2019-12-07 18:08:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:08:35,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:08:35,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 38 [2019-12-07 18:08:35,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702944403] [2019-12-07 18:08:35,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-07 18:08:35,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:08:35,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-07 18:08:35,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1461, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 18:08:35,009 INFO L87 Difference]: Start difference. First operand 598 states and 1141 transitions. Second operand 40 states. [2019-12-07 18:08:41,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:08:41,535 INFO L93 Difference]: Finished difference Result 916 states and 1765 transitions. [2019-12-07 18:08:41,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-07 18:08:41,535 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 73 [2019-12-07 18:08:41,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:08:41,536 INFO L225 Difference]: With dead ends: 916 [2019-12-07 18:08:41,536 INFO L226 Difference]: Without dead ends: 916 [2019-12-07 18:08:41,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 59 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=402, Invalid=5450, Unknown=0, NotChecked=0, Total=5852 [2019-12-07 18:08:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2019-12-07 18:08:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 666. [2019-12-07 18:08:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-12-07 18:08:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1271 transitions. [2019-12-07 18:08:41,544 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1271 transitions. Word has length 73 [2019-12-07 18:08:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:08:41,544 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1271 transitions. [2019-12-07 18:08:41,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-07 18:08:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1271 transitions. [2019-12-07 18:08:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-12-07 18:08:41,545 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:08:41,545 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:08:41,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:08:41,746 INFO L410 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:08:41,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:08:41,746 INFO L82 PathProgramCache]: Analyzing trace with hash -92126754, now seen corresponding path program 7 times [2019-12-07 18:08:41,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:08:41,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586263807] [2019-12-07 18:08:41,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:08:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:08:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 52 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:08:43,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586263807] [2019-12-07 18:08:43,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519629730] [2019-12-07 18:08:43,529 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/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 [2019-12-07 18:08:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:08:43,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 109 conjunts are in the unsatisfiable core [2019-12-07 18:08:43,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:08:43,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:08:43,835 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-12-07 18:08:43,835 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:08:43,845 INFO L614 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2019-12-07 18:08:43,845 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:08:43,845 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:22 [2019-12-07 18:08:44,182 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-12-07 18:08:44,183 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2019-12-07 18:08:44,183 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:08:44,189 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:44,189 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:08:44,189 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:23 [2019-12-07 18:08:44,496 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:08:44,497 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2019-12-07 18:08:44,497 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:08:44,511 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:08:44,511 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:08:44,511 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:23 [2019-12-07 18:09:03,146 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:09:03,147 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 68 [2019-12-07 18:09:03,147 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:09:03,176 INFO L614 ElimStorePlain]: treesize reduction 26, result has 69.0 percent of original size [2019-12-07 18:09:03,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:03,177 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-12-07 18:09:03,178 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:49, output treesize:36 [2019-12-07 18:09:03,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:03,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:03,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:03,825 INFO L430 ElimStorePlain]: Different costs {0=[|v_#memory_int_103|], 2=[v_prenex_23]} [2019-12-07 18:09:03,828 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 18:09:03,828 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:09:03,850 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:09:03,863 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:09:03,863 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 68 [2019-12-07 18:09:03,863 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 18:09:03,908 INFO L614 ElimStorePlain]: treesize reduction 26, result has 75.5 percent of original size [2019-12-07 18:09:03,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:03,909 INFO L534 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2019-12-07 18:09:03,910 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:75, output treesize:39 [2019-12-07 18:09:04,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:04,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:04,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:04,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:04,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:04,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:04,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:04,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:09,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:09,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:12,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:12,257 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:09:12,257 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 35 [2019-12-07 18:09:12,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:12,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:12,258 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:09:12,283 INFO L614 ElimStorePlain]: treesize reduction 64, result has 41.8 percent of original size [2019-12-07 18:09:12,287 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:09:12,287 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2019-12-07 18:09:12,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:12,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:12,288 INFO L534 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:09:12,307 INFO L614 ElimStorePlain]: treesize reduction 14, result has 67.4 percent of original size [2019-12-07 18:09:12,307 INFO L534 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:09:12,307 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 12 variables, input treesize:121, output treesize:11 [2019-12-07 18:09:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 64 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:09:12,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:09:12,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37] total 76 [2019-12-07 18:09:12,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421160841] [2019-12-07 18:09:12,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-12-07 18:09:12,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:09:12,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-12-07 18:09:12,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=5428, Unknown=12, NotChecked=0, Total=6006 [2019-12-07 18:09:12,423 INFO L87 Difference]: Start difference. First operand 666 states and 1271 transitions. Second operand 78 states. [2019-12-07 18:09:19,662 WARN L192 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2019-12-07 18:09:22,703 WARN L192 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2019-12-07 18:09:26,406 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2019-12-07 18:09:30,207 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2019-12-07 18:09:38,007 WARN L192 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 47 [2019-12-07 18:09:42,284 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2019-12-07 18:09:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:09:47,000 INFO L93 Difference]: Finished difference Result 2030 states and 3911 transitions. [2019-12-07 18:09:47,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-12-07 18:09:47,001 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 81 [2019-12-07 18:09:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:09:47,002 INFO L225 Difference]: With dead ends: 2030 [2019-12-07 18:09:47,002 INFO L226 Difference]: Without dead ends: 1369 [2019-12-07 18:09:47,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6182 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=1946, Invalid=18346, Unknown=14, NotChecked=0, Total=20306 [2019-12-07 18:09:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2019-12-07 18:09:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1158. [2019-12-07 18:09:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1158 states. [2019-12-07 18:09:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 2206 transitions. [2019-12-07 18:09:47,015 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 2206 transitions. Word has length 81 [2019-12-07 18:09:47,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:09:47,015 INFO L462 AbstractCegarLoop]: Abstraction has 1158 states and 2206 transitions. [2019-12-07 18:09:47,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-12-07 18:09:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 2206 transitions. [2019-12-07 18:09:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-12-07 18:09:47,016 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:09:47,017 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:09:47,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:09:47,217 INFO L410 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:09:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:09:47,218 INFO L82 PathProgramCache]: Analyzing trace with hash -366763430, now seen corresponding path program 8 times [2019-12-07 18:09:47,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:09:47,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721320350] [2019-12-07 18:09:47,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:09:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:09:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 10 proven. 137 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 18:09:49,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721320350] [2019-12-07 18:09:49,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855250942] [2019-12-07 18:09:49,423 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/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 [2019-12-07 18:09:49,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:09:49,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:09:49,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 109 conjunts are in the unsatisfiable core [2019-12-07 18:09:49,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:09:49,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:49,697 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-12-07 18:09:49,697 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:09:49,705 INFO L614 ElimStorePlain]: treesize reduction 5, result has 79.2 percent of original size [2019-12-07 18:09:49,705 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:09:49,705 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2019-12-07 18:09:50,122 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:09:50,122 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2019-12-07 18:09:50,123 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:09:50,130 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:09:50,131 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:09:50,131 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:20 [2019-12-07 18:09:50,754 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:09:50,755 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2019-12-07 18:09:50,755 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:09:50,775 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:09:50,776 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:09:50,776 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:20 [2019-12-07 18:09:51,259 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:09:51,260 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2019-12-07 18:09:51,260 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:09:51,268 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:09:51,268 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:09:51,269 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:20 [2019-12-07 18:09:51,711 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:09:51,711 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2019-12-07 18:09:51,712 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:09:51,720 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:09:51,720 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:09:51,720 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:20 [2019-12-07 18:09:52,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:09:52,495 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2019-12-07 18:09:52,495 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:09:52,509 INFO L614 ElimStorePlain]: treesize reduction 32, result has 50.0 percent of original size [2019-12-07 18:09:52,511 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-12-07 18:09:52,511 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 18:09:52,514 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:09:52,514 INFO L534 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:09:52,514 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:93, output treesize:11 [2019-12-07 18:09:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 4 proven. 131 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 18:09:52,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:09:52,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28] total 64 [2019-12-07 18:09:52,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489062588] [2019-12-07 18:09:52,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-12-07 18:09:52,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:09:52,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-12-07 18:09:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=3924, Unknown=0, NotChecked=0, Total=4160 [2019-12-07 18:09:52,642 INFO L87 Difference]: Start difference. First operand 1158 states and 2206 transitions. Second operand 65 states. [2019-12-07 18:09:58,101 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2019-12-07 18:10:01,074 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2019-12-07 18:10:05,491 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2019-12-07 18:10:06,430 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-12-07 18:10:06,920 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2019-12-07 18:10:07,672 WARN L192 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2019-12-07 18:10:08,714 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2019-12-07 18:10:09,961 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-12-07 18:10:12,568 WARN L192 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2019-12-07 18:10:22,405 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2019-12-07 18:10:22,982 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2019-12-07 18:10:24,629 WARN L192 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2019-12-07 18:10:25,814 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2019-12-07 18:10:29,166 WARN L192 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2019-12-07 18:10:29,640 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2019-12-07 18:10:30,355 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2019-12-07 18:10:30,884 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2019-12-07 18:10:32,814 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2019-12-07 18:10:34,054 WARN L192 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2019-12-07 18:10:35,260 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2019-12-07 18:10:36,366 WARN L192 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2019-12-07 18:10:36,857 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2019-12-07 18:10:38,737 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2019-12-07 18:10:39,377 WARN L192 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2019-12-07 18:10:41,715 WARN L192 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2019-12-07 18:10:43,083 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2019-12-07 18:10:46,079 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2019-12-07 18:10:47,342 WARN L192 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2019-12-07 18:10:47,828 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2019-12-07 18:10:49,387 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2019-12-07 18:10:49,960 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2019-12-07 18:10:51,070 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-12-07 18:10:51,469 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2019-12-07 18:10:53,790 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2019-12-07 18:10:56,646 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2019-12-07 18:10:57,541 WARN L192 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2019-12-07 18:10:59,670 WARN L192 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-12-07 18:11:09,003 WARN L192 SmtUtils]: Spent 5.06 s on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2019-12-07 18:11:09,843 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2019-12-07 18:11:10,231 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2019-12-07 18:11:17,395 WARN L192 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2019-12-07 18:11:21,050 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2019-12-07 18:11:24,457 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2019-12-07 18:11:27,112 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2019-12-07 18:11:32,330 WARN L192 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2019-12-07 18:11:32,835 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2019-12-07 18:11:33,780 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2019-12-07 18:11:39,135 WARN L192 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2019-12-07 18:11:40,046 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2019-12-07 18:11:40,526 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2019-12-07 18:11:41,472 WARN L192 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2019-12-07 18:11:43,745 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2019-12-07 18:11:44,402 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2019-12-07 18:11:46,931 WARN L192 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2019-12-07 18:11:47,488 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2019-12-07 18:11:47,996 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2019-12-07 18:11:48,990 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2019-12-07 18:11:50,042 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2019-12-07 18:11:51,720 WARN L192 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2019-12-07 18:11:52,923 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2019-12-07 18:11:58,767 WARN L192 SmtUtils]: Spent 3.31 s on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2019-12-07 18:12:07,236 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2019-12-07 18:12:09,858 WARN L192 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2019-12-07 18:12:14,834 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2019-12-07 18:12:16,778 WARN L192 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2019-12-07 18:12:25,336 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2019-12-07 18:12:25,922 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2019-12-07 18:12:26,912 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2019-12-07 18:12:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:12:37,192 INFO L93 Difference]: Finished difference Result 2101 states and 3994 transitions. [2019-12-07 18:12:37,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2019-12-07 18:12:37,192 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 81 [2019-12-07 18:12:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:12:37,194 INFO L225 Difference]: With dead ends: 2101 [2019-12-07 18:12:37,194 INFO L226 Difference]: Without dead ends: 1489 [2019-12-07 18:12:37,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8706 ImplicationChecksByTransitivity, 102.9s TimeCoverageRelationStatistics Valid=2634, Invalid=29577, Unknown=9, NotChecked=0, Total=32220 [2019-12-07 18:12:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2019-12-07 18:12:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 924. [2019-12-07 18:12:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2019-12-07 18:12:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1760 transitions. [2019-12-07 18:12:37,206 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1760 transitions. Word has length 81 [2019-12-07 18:12:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:12:37,206 INFO L462 AbstractCegarLoop]: Abstraction has 924 states and 1760 transitions. [2019-12-07 18:12:37,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-12-07 18:12:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1760 transitions. [2019-12-07 18:12:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-12-07 18:12:37,207 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:12:37,207 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:12:37,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:12:37,408 INFO L410 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:12:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:12:37,408 INFO L82 PathProgramCache]: Analyzing trace with hash -159913190, now seen corresponding path program 9 times [2019-12-07 18:12:37,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:12:37,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229846030] [2019-12-07 18:12:37,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:12:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:12:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 52 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:12:39,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229846030] [2019-12-07 18:12:39,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273133307] [2019-12-07 18:12:39,886 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/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 [2019-12-07 18:12:40,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 18:12:40,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:12:40,030 INFO L264 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 130 conjunts are in the unsatisfiable core [2019-12-07 18:12:40,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:12:40,036 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2019-12-07 18:12:40,036 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 18:12:40,060 INFO L614 ElimStorePlain]: treesize reduction 30, result has 47.4 percent of original size [2019-12-07 18:12:40,061 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:12:40,061 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:30, output treesize:11 [2019-12-07 18:12:40,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:12:40,298 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-12-07 18:12:40,298 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:12:40,313 INFO L614 ElimStorePlain]: treesize reduction 5, result has 85.3 percent of original size [2019-12-07 18:12:40,313 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:12:40,313 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2019-12-07 18:12:40,642 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:12:40,643 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2019-12-07 18:12:40,643 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:12:40,653 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:12:40,654 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:12:40,654 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:25 [2019-12-07 18:12:40,918 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:12:40,918 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2019-12-07 18:12:40,918 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:12:40,926 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:12:40,927 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:12:40,927 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:25 [2019-12-07 18:12:40,990 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2019-12-07 18:12:40,990 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:12:40,998 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:12:40,999 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 18:12:40,999 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:36, output treesize:32 [2019-12-07 18:12:41,330 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:12:41,331 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2019-12-07 18:12:41,331 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:12:41,344 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:12:41,345 INFO L534 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 18:12:41,345 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:32 [2019-12-07 18:12:41,810 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 18:12:41,811 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2019-12-07 18:12:41,811 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:12:41,827 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:12:41,827 INFO L534 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 18:12:41,827 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:32 [2019-12-07 18:12:43,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:12:43,746 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:12:43,748 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:12:43,748 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2019-12-07 18:12:43,749 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:12:43,751 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:12:43,752 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2019-12-07 18:12:43,752 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 18:12:43,771 INFO L614 ElimStorePlain]: treesize reduction 36, result has 39.0 percent of original size [2019-12-07 18:12:43,771 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:12:43,771 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:115, output treesize:11 [2019-12-07 18:12:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 56 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:12:43,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:12:43,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2019-12-07 18:12:43,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221816472] [2019-12-07 18:12:43,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-12-07 18:12:43,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:12:43,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-12-07 18:12:43,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=6290, Unknown=0, NotChecked=0, Total=6642 [2019-12-07 18:12:43,921 INFO L87 Difference]: Start difference. First operand 924 states and 1760 transitions. Second operand 82 states. [2019-12-07 18:12:50,212 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2019-12-07 18:12:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:12:55,714 INFO L93 Difference]: Finished difference Result 1348 states and 2558 transitions. [2019-12-07 18:12:55,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-12-07 18:12:55,715 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2019-12-07 18:12:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:12:55,716 INFO L225 Difference]: With dead ends: 1348 [2019-12-07 18:12:55,716 INFO L226 Difference]: Without dead ends: 1015 [2019-12-07 18:12:55,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5568 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1409, Invalid=17223, Unknown=0, NotChecked=0, Total=18632 [2019-12-07 18:12:55,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2019-12-07 18:12:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 897. [2019-12-07 18:12:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2019-12-07 18:12:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1696 transitions. [2019-12-07 18:12:55,726 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1696 transitions. Word has length 81 [2019-12-07 18:12:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:12:55,726 INFO L462 AbstractCegarLoop]: Abstraction has 897 states and 1696 transitions. [2019-12-07 18:12:55,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-12-07 18:12:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1696 transitions. [2019-12-07 18:12:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-12-07 18:12:55,727 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:12:55,727 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:12:55,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:12:55,928 INFO L410 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:12:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:12:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash 116347881, now seen corresponding path program 10 times [2019-12-07 18:12:55,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:12:55,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584624611] [2019-12-07 18:12:55,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:12:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:12:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 126 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 18:12:56,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584624611] [2019-12-07 18:12:56,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305990387] [2019-12-07 18:12:56,071 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/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 [2019-12-07 18:12:56,168 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:12:56,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:12:56,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 18:12:56,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:12:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 126 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 18:12:56,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:12:56,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-12-07 18:12:56,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564045876] [2019-12-07 18:12:56,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 18:12:56,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:12:56,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 18:12:56,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:12:56,195 INFO L87 Difference]: Start difference. First operand 897 states and 1696 transitions. Second operand 17 states. [2019-12-07 18:12:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:12:56,316 INFO L93 Difference]: Finished difference Result 806 states and 1500 transitions. [2019-12-07 18:12:56,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 18:12:56,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 89 [2019-12-07 18:12:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:12:56,317 INFO L225 Difference]: With dead ends: 806 [2019-12-07 18:12:56,317 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 18:12:56,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2019-12-07 18:12:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 18:12:56,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 18:12:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 18:12:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 18:12:56,317 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 89 [2019-12-07 18:12:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:12:56,317 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 18:12:56,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 18:12:56,318 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 18:12:56,318 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 18:12:56,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:12:56,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:12:56 BasicIcfg [2019-12-07 18:12:56,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:12:56,521 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:12:56,521 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:12:56,521 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:12:56,521 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:01:56" (3/4) ... [2019-12-07 18:12:56,524 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 18:12:56,528 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-12-07 18:12:56,528 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-12-07 18:12:56,530 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2019-12-07 18:12:56,530 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-12-07 18:12:56,531 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 18:12:56,554 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_743c345d-bef4-4551-883e-3243897e7a58/bin/uautomizer/witness.graphml [2019-12-07 18:12:56,554 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:12:56,555 INFO L168 Benchmark]: Toolchain (without parser) took 661327.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 942.5 MB in the beginning and 1.0 GB in the end (delta: -75.6 MB). Peak memory consumption was 53.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:12:56,555 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:12:56,555 INFO L168 Benchmark]: CACSL2BoogieTranslator took 443.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.6 MB). Free memory was 942.5 MB in the beginning and 1.0 GB in the end (delta: -95.7 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:12:56,555 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.22 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:12:56,555 INFO L168 Benchmark]: Boogie Preprocessor took 22.42 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:12:56,555 INFO L168 Benchmark]: RCFGBuilder took 308.83 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 38.0 MB). Peak memory consumption was 38.0 MB. Max. memory is 11.5 GB. [2019-12-07 18:12:56,555 INFO L168 Benchmark]: TraceAbstraction took 660477.40 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 30.4 MB). Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: -20.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:12:56,556 INFO L168 Benchmark]: Witness Printer took 32.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 18:12:56,556 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 443.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.6 MB). Free memory was 942.5 MB in the beginning and 1.0 GB in the end (delta: -95.7 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 39.22 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.42 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 308.83 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 38.0 MB). Peak memory consumption was 38.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 660477.40 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 30.4 MB). Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: -20.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 11.5 GB. * Witness Printer took 32.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.5s, 133 ProgramPointsBefore, 39 ProgramPointsAfterwards, 137 TransitionsBefore, 40 TransitionsAfterwards, 5224 CoEnabledTransitionPairs, 7 FixpointIterations, 30 TrivialSequentialCompositions, 65 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 4 ChoiceCompositions, 2885 VarBasedMoverChecksPositive, 58 VarBasedMoverChecksNegative, 23 SemBasedMoverChecksPositive, 62 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 0 MoverChecksTotal, 7527 CheckedPairsTotal, 115 TotalNumberOfCompositions - PositiveResult [Line: 919]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 919]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 127 locations, 2 error locations. Result: SAFE, OverallTime: 660.3s, OverallIterations: 26, TraceHistogramMax: 6, AutomataDifference: 592.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 2108 SDtfs, 9929 SDslu, 39207 SDs, 0 SdLazy, 54392 SolverSat, 1929 SolverUnsat, 39 SolverUnknown, 0 SolverNotchecked, 241.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2440 GetRequests, 931 SyntacticMatches, 36 SemanticMatches, 1473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59142 ImplicationChecksByTransitivity, 393.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1158occurred in iteration=23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 26 MinimizatonAttempts, 8252 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 57.6s InterpolantComputationTime, 2152 NumberOfCodeBlocks, 2122 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 2105 ConstructedInterpolants, 379 QuantifiedInterpolants, 2178480 SizeOfPredicates, 477 NumberOfNonLiveVariables, 6453 ConjunctsInSsa, 980 ConjunctsInUnsatCore, 47 InterpolantComputations, 8 PerfectInterpolantSequences, 962/2872 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...