./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9b4637dc8cec016362b73cb3abfcfe80e3e63b6e ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:11:25,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:11:25,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:11:26,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:11:26,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:11:26,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:11:26,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:11:26,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:11:26,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:11:26,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:11:26,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:11:26,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:11:26,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:11:26,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:11:26,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:11:26,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:11:26,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:11:26,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:11:26,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:11:26,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:11:26,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:11:26,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:11:26,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:11:26,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:11:26,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:11:26,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:11:26,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:11:26,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:11:26,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:11:26,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:11:26,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:11:26,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:11:26,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:11:26,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:11:26,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:11:26,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:11:26,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:11:26,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:11:26,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:11:26,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:11:26,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:11:26,094 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:11:26,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:11:26,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:11:26,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:11:26,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:11:26,133 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:11:26,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:11:26,133 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:11:26,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:11:26,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:11:26,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:11:26,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:11:26,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:11:26,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:11:26,135 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:11:26,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:11:26,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:11:26,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:11:26,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:11:26,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:11:26,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:11:26,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:11:26,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:11:26,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:11:26,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:11:26,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:11:26,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:11:26,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:11:26,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:11:26,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:11:26,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b4637dc8cec016362b73cb3abfcfe80e3e63b6e [2020-11-28 03:11:26,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:11:26,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:11:26,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:11:26,476 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:11:26,477 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:11:26,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-1.i [2020-11-28 03:11:26,573 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/data/349f1bb9d/d77190cc60a64cc1b480b7205c2add29/FLAG08f2aa016 [2020-11-28 03:11:27,222 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:11:27,222 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/sv-benchmarks/c/pthread/triangular-1.i [2020-11-28 03:11:27,241 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/data/349f1bb9d/d77190cc60a64cc1b480b7205c2add29/FLAG08f2aa016 [2020-11-28 03:11:27,515 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/data/349f1bb9d/d77190cc60a64cc1b480b7205c2add29 [2020-11-28 03:11:27,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:11:27,519 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:11:27,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:11:27,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:11:27,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:11:27,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:27" (1/1) ... [2020-11-28 03:11:27,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be34c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:27, skipping insertion in model container [2020-11-28 03:11:27,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:27" (1/1) ... [2020-11-28 03:11:27,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:11:27,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:11:27,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:11:27,965 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:11:28,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:11:28,079 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:11:28,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28 WrapperNode [2020-11-28 03:11:28,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:11:28,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:11:28,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:11:28,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:11:28,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28" (1/1) ... [2020-11-28 03:11:28,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28" (1/1) ... [2020-11-28 03:11:28,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:11:28,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:11:28,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:11:28,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:11:28,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28" (1/1) ... [2020-11-28 03:11:28,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28" (1/1) ... [2020-11-28 03:11:28,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28" (1/1) ... [2020-11-28 03:11:28,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28" (1/1) ... [2020-11-28 03:11:28,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28" (1/1) ... [2020-11-28 03:11:28,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28" (1/1) ... [2020-11-28 03:11:28,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28" (1/1) ... [2020-11-28 03:11:28,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:11:28,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:11:28,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:11:28,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:11:28,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:28,219 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-28 03:11:28,219 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-28 03:11:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-28 03:11:28,220 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-28 03:11:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:11:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-28 03:11:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:11:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:11:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:11:28,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-28 03:11:28,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:11:28,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:11:28,223 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-28 03:11:28,635 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:11:28,635 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-28 03:11:28,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:28 BoogieIcfgContainer [2020-11-28 03:11:28,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:11:28,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:11:28,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:11:28,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:11:28,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:11:27" (1/3) ... [2020-11-28 03:11:28,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e416666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:11:28, skipping insertion in model container [2020-11-28 03:11:28,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28" (2/3) ... [2020-11-28 03:11:28,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e416666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:11:28, skipping insertion in model container [2020-11-28 03:11:28,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:28" (3/3) ... [2020-11-28 03:11:28,659 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-11-28 03:11:28,671 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-28 03:11:28,671 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:11:28,675 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:11:28,676 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-28 03:11:28,715 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,715 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,715 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,715 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,717 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,720 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,721 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,721 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,722 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,722 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,722 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,723 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,723 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,725 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,725 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,725 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,726 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,728 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,728 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,729 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,729 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,729 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,729 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,734 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,734 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,734 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,734 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,735 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,735 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 03:11:28,744 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-28 03:11:28,756 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-28 03:11:28,778 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:11:28,778 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:11:28,778 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:11:28,778 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:11:28,779 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:11:28,779 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:11:28,779 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:11:28,779 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:11:28,790 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-28 03:11:28,792 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-28 03:11:28,795 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-28 03:11:28,797 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-28 03:11:28,833 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-28 03:11:28,833 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-28 03:11:28,838 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-28 03:11:28,840 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-28 03:11:30,298 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-28 03:11:30,743 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-11-28 03:11:30,918 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-28 03:11:30,930 INFO L131 LiptonReduction]: Checked pairs total: 1062 [2020-11-28 03:11:30,930 INFO L133 LiptonReduction]: Total number of compositions: 60 [2020-11-28 03:11:30,936 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-28 03:11:30,945 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-28 03:11:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-28 03:11:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 03:11:30,954 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:30,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 03:11:30,955 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:30,961 INFO L82 PathProgramCache]: Analyzing trace with hash -720017533, now seen corresponding path program 1 times [2020-11-28 03:11:30,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:30,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274081574] [2020-11-28 03:11:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:31,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274081574] [2020-11-28 03:11:31,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:31,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:11:31,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166917636] [2020-11-28 03:11:31,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:11:31,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:31,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:11:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:11:31,259 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-28 03:11:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:31,336 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-28 03:11:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:11:31,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 03:11:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:31,347 INFO L225 Difference]: With dead ends: 75 [2020-11-28 03:11:31,347 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 03:11:31,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:11:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 03:11:31,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-28 03:11:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 03:11:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-28 03:11:31,389 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-28 03:11:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:31,389 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-28 03:11:31,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:11:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-28 03:11:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:11:31,392 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:31,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:31,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:11:31,393 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:31,393 INFO L82 PathProgramCache]: Analyzing trace with hash -447013893, now seen corresponding path program 1 times [2020-11-28 03:11:31,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:31,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903816568] [2020-11-28 03:11:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:31,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903816568] [2020-11-28 03:11:31,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:31,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:11:31,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110122368] [2020-11-28 03:11:31,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:11:31,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:31,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:11:31,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:11:31,534 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-28 03:11:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:31,580 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-28 03:11:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:11:31,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-28 03:11:31,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:31,582 INFO L225 Difference]: With dead ends: 56 [2020-11-28 03:11:31,582 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 03:11:31,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 03:11:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-28 03:11:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 03:11:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-28 03:11:31,590 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-28 03:11:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:31,591 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-28 03:11:31,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:11:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-28 03:11:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:11:31,593 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:31,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:31,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:11:31,593 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:31,594 INFO L82 PathProgramCache]: Analyzing trace with hash -190894617, now seen corresponding path program 1 times [2020-11-28 03:11:31,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:31,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878480274] [2020-11-28 03:11:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:31,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878480274] [2020-11-28 03:11:31,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:31,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:11:31,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577465440] [2020-11-28 03:11:31,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:11:31,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:31,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:11:31,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:31,739 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-28 03:11:31,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:31,827 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-28 03:11:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:11:31,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 03:11:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:31,829 INFO L225 Difference]: With dead ends: 54 [2020-11-28 03:11:31,829 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 03:11:31,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:11:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 03:11:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-28 03:11:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:11:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-28 03:11:31,842 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-28 03:11:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:31,843 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-28 03:11:31,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:11:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-28 03:11:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:11:31,847 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:31,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:31,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:11:31,847 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:31,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:31,849 INFO L82 PathProgramCache]: Analyzing trace with hash -83647017, now seen corresponding path program 2 times [2020-11-28 03:11:31,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:31,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963721431] [2020-11-28 03:11:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:31,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963721431] [2020-11-28 03:11:31,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:31,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:11:31,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494599137] [2020-11-28 03:11:31,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:11:31,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:31,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:11:31,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:31,957 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-28 03:11:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:32,036 INFO L93 Difference]: Finished difference Result 84 states and 192 transitions. [2020-11-28 03:11:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:11:32,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 03:11:32,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:32,041 INFO L225 Difference]: With dead ends: 84 [2020-11-28 03:11:32,041 INFO L226 Difference]: Without dead ends: 77 [2020-11-28 03:11:32,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:11:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-28 03:11:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-11-28 03:11:32,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 03:11:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-28 03:11:32,050 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 10 [2020-11-28 03:11:32,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:32,050 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-28 03:11:32,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:11:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-28 03:11:32,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:11:32,051 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:32,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:32,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:11:32,052 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:32,052 INFO L82 PathProgramCache]: Analyzing trace with hash -83970657, now seen corresponding path program 3 times [2020-11-28 03:11:32,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:32,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130670567] [2020-11-28 03:11:32,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:32,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130670567] [2020-11-28 03:11:32,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:32,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:11:32,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44632753] [2020-11-28 03:11:32,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:11:32,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:32,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:11:32,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:32,142 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 6 states. [2020-11-28 03:11:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:32,228 INFO L93 Difference]: Finished difference Result 61 states and 139 transitions. [2020-11-28 03:11:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:11:32,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 03:11:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:32,230 INFO L225 Difference]: With dead ends: 61 [2020-11-28 03:11:32,230 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 03:11:32,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:11:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 03:11:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-28 03:11:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 03:11:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 96 transitions. [2020-11-28 03:11:32,240 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 96 transitions. Word has length 10 [2020-11-28 03:11:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:32,241 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 96 transitions. [2020-11-28 03:11:32,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:11:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 96 transitions. [2020-11-28 03:11:32,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:11:32,242 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:32,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:32,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:11:32,242 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:32,243 INFO L82 PathProgramCache]: Analyzing trace with hash -118912617, now seen corresponding path program 4 times [2020-11-28 03:11:32,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:32,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94608246] [2020-11-28 03:11:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:32,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94608246] [2020-11-28 03:11:32,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:32,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:11:32,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488813993] [2020-11-28 03:11:32,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:11:32,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:32,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:11:32,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:32,317 INFO L87 Difference]: Start difference. First operand 40 states and 96 transitions. Second operand 6 states. [2020-11-28 03:11:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:32,422 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-11-28 03:11:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:11:32,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 03:11:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:32,428 INFO L225 Difference]: With dead ends: 55 [2020-11-28 03:11:32,428 INFO L226 Difference]: Without dead ends: 49 [2020-11-28 03:11:32,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:11:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-28 03:11:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-28 03:11:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 03:11:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-28 03:11:32,434 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-28 03:11:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:32,434 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-28 03:11:32,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:11:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-28 03:11:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:11:32,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:32,435 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:32,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:11:32,435 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:32,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1691902418, now seen corresponding path program 5 times [2020-11-28 03:11:32,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:32,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437842917] [2020-11-28 03:11:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:32,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437842917] [2020-11-28 03:11:32,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545221534] [2020-11-28 03:11:32,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:32,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:11:32,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:32,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:11:32,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:32,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:32,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:32,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-28 03:11:32,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497777792] [2020-11-28 03:11:32,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:11:32,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:32,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:11:32,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:11:32,769 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-11-28 03:11:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:32,972 INFO L93 Difference]: Finished difference Result 55 states and 131 transitions. [2020-11-28 03:11:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:11:32,973 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-28 03:11:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:32,974 INFO L225 Difference]: With dead ends: 55 [2020-11-28 03:11:32,974 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 03:11:32,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:11:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 03:11:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-28 03:11:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 03:11:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-11-28 03:11:32,979 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-11-28 03:11:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:32,980 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-11-28 03:11:32,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:11:32,980 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-11-28 03:11:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:11:32,980 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:32,980 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:33,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-28 03:11:33,204 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:33,204 INFO L82 PathProgramCache]: Analyzing trace with hash 608698775, now seen corresponding path program 6 times [2020-11-28 03:11:33,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:33,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278746631] [2020-11-28 03:11:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:33,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278746631] [2020-11-28 03:11:33,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979032124] [2020-11-28 03:11:33,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:33,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-28 03:11:33,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:33,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:11:33,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:33,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 03:11:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:33,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:33,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-28 03:11:33,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710986921] [2020-11-28 03:11:33,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:11:33,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:33,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:11:33,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:11:33,442 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-11-28 03:11:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:33,640 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-28 03:11:33,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:11:33,641 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-28 03:11:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:33,641 INFO L225 Difference]: With dead ends: 64 [2020-11-28 03:11:33,641 INFO L226 Difference]: Without dead ends: 55 [2020-11-28 03:11:33,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:11:33,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-28 03:11:33,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-11-28 03:11:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 03:11:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-28 03:11:33,647 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-28 03:11:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:33,647 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-28 03:11:33,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:11:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-28 03:11:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:11:33,648 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:33,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:33,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:33,860 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:33,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1233878826, now seen corresponding path program 7 times [2020-11-28 03:11:33,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:33,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278679527] [2020-11-28 03:11:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:33,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278679527] [2020-11-28 03:11:33,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111201244] [2020-11-28 03:11:33,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:34,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:11:34,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:34,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:34,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:34,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-28 03:11:34,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17184802] [2020-11-28 03:11:34,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:11:34,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:34,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:11:34,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:11:34,088 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-11-28 03:11:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:34,235 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-28 03:11:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:11:34,236 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-28 03:11:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:34,237 INFO L225 Difference]: With dead ends: 56 [2020-11-28 03:11:34,237 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 03:11:34,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:11:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 03:11:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-28 03:11:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-28 03:11:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-28 03:11:34,242 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-28 03:11:34,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:34,243 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-28 03:11:34,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:11:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-28 03:11:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:11:34,244 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:34,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:34,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:34,445 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:34,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1219607322, now seen corresponding path program 8 times [2020-11-28 03:11:34,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:34,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297812218] [2020-11-28 03:11:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:34,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297812218] [2020-11-28 03:11:34,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345083841] [2020-11-28 03:11:34,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:34,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:11:34,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:34,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:11:34,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:34,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:34,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-28 03:11:34,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982456625] [2020-11-28 03:11:34,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:11:34,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:34,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:11:34,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:11:34,653 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 8 states. [2020-11-28 03:11:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:34,777 INFO L93 Difference]: Finished difference Result 72 states and 163 transitions. [2020-11-28 03:11:34,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:11:34,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-28 03:11:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:34,780 INFO L225 Difference]: With dead ends: 72 [2020-11-28 03:11:34,780 INFO L226 Difference]: Without dead ends: 66 [2020-11-28 03:11:34,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:11:34,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-28 03:11:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-11-28 03:11:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-28 03:11:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-28 03:11:34,794 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-28 03:11:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:34,795 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-28 03:11:34,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:11:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-28 03:11:34,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:11:34,796 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:34,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:35,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:35,012 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:35,012 INFO L82 PathProgramCache]: Analyzing trace with hash 909390012, now seen corresponding path program 9 times [2020-11-28 03:11:35,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:35,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047546728] [2020-11-28 03:11:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:35,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047546728] [2020-11-28 03:11:35,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333884300] [2020-11-28 03:11:35,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:35,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 03:11:35,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:35,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:11:35,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:35,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 03:11:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:35,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:35,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-28 03:11:35,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647434562] [2020-11-28 03:11:35,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:11:35,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:35,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:11:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:11:35,244 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-11-28 03:11:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:35,528 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-11-28 03:11:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:11:35,528 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-28 03:11:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:35,529 INFO L225 Difference]: With dead ends: 68 [2020-11-28 03:11:35,529 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 03:11:35,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:11:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 03:11:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2020-11-28 03:11:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 03:11:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-11-28 03:11:35,533 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 12 [2020-11-28 03:11:35,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:35,533 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-11-28 03:11:35,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:11:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-11-28 03:11:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:11:35,534 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:35,534 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:35,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-28 03:11:35,744 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1689818330, now seen corresponding path program 10 times [2020-11-28 03:11:35,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:35,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225835557] [2020-11-28 03:11:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:35,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225835557] [2020-11-28 03:11:35,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625241402] [2020-11-28 03:11:35,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:35,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:11:35,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:11:35,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:35,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:35,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:35,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-28 03:11:35,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523920596] [2020-11-28 03:11:35,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:11:35,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:35,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:11:35,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:11:35,933 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 9 states. [2020-11-28 03:11:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:36,159 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-11-28 03:11:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:11:36,160 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-28 03:11:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:36,160 INFO L225 Difference]: With dead ends: 63 [2020-11-28 03:11:36,160 INFO L226 Difference]: Without dead ends: 58 [2020-11-28 03:11:36,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:11:36,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-28 03:11:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-11-28 03:11:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 03:11:36,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-28 03:11:36,163 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-11-28 03:11:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:36,164 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-28 03:11:36,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:11:36,164 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-28 03:11:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 03:11:36,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:36,165 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:36,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:36,376 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:36,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1873655211, now seen corresponding path program 11 times [2020-11-28 03:11:36,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:36,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019878299] [2020-11-28 03:11:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:36,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019878299] [2020-11-28 03:11:36,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626770867] [2020-11-28 03:11:36,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:36,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-28 03:11:36,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:36,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:11:36,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:36,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:36,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:36,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-28 03:11:36,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346859515] [2020-11-28 03:11:36,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:11:36,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:36,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:11:36,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:11:36,583 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-11-28 03:11:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:36,807 INFO L93 Difference]: Finished difference Result 63 states and 151 transitions. [2020-11-28 03:11:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:11:36,808 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-28 03:11:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:36,808 INFO L225 Difference]: With dead ends: 63 [2020-11-28 03:11:36,808 INFO L226 Difference]: Without dead ends: 58 [2020-11-28 03:11:36,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:11:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-28 03:11:36,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-11-28 03:11:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 03:11:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-11-28 03:11:36,813 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-11-28 03:11:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:36,813 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-11-28 03:11:36,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:11:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-11-28 03:11:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 03:11:36,814 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:36,814 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:37,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:37,024 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:37,024 INFO L82 PathProgramCache]: Analyzing trace with hash 844783284, now seen corresponding path program 12 times [2020-11-28 03:11:37,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:37,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214018241] [2020-11-28 03:11:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:37,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214018241] [2020-11-28 03:11:37,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469270422] [2020-11-28 03:11:37,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:37,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-28 03:11:37,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:37,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:11:37,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:37,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:37,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-28 03:11:37,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797725486] [2020-11-28 03:11:37,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:11:37,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:37,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:11:37,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:11:37,273 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 10 states. [2020-11-28 03:11:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:37,557 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-28 03:11:37,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:11:37,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-28 03:11:37,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:37,558 INFO L225 Difference]: With dead ends: 73 [2020-11-28 03:11:37,558 INFO L226 Difference]: Without dead ends: 64 [2020-11-28 03:11:37,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:11:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-28 03:11:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-11-28 03:11:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 03:11:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-28 03:11:37,563 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-28 03:11:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:37,563 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-28 03:11:37,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:11:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-28 03:11:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:11:37,564 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:37,564 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:37,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-28 03:11:37,776 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:37,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:37,776 INFO L82 PathProgramCache]: Analyzing trace with hash 346590125, now seen corresponding path program 13 times [2020-11-28 03:11:37,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:37,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308805101] [2020-11-28 03:11:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:37,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308805101] [2020-11-28 03:11:37,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065182664] [2020-11-28 03:11:37,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:37,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:11:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:37,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:37,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:37,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-28 03:11:37,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163984493] [2020-11-28 03:11:37,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:11:37,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:37,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:11:37,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:11:37,989 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-11-28 03:11:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:38,202 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-28 03:11:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:11:38,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-28 03:11:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:38,204 INFO L225 Difference]: With dead ends: 64 [2020-11-28 03:11:38,204 INFO L226 Difference]: Without dead ends: 58 [2020-11-28 03:11:38,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:11:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-28 03:11:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-28 03:11:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-28 03:11:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-28 03:11:38,208 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-28 03:11:38,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:38,208 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-28 03:11:38,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:11:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-28 03:11:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:11:38,209 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:38,209 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:38,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-28 03:11:38,428 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:38,428 INFO L82 PathProgramCache]: Analyzing trace with hash -483423331, now seen corresponding path program 14 times [2020-11-28 03:11:38,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:38,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819249067] [2020-11-28 03:11:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:38,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819249067] [2020-11-28 03:11:38,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977408791] [2020-11-28 03:11:38,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:38,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:11:38,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:38,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:11:38,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:38,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:38,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-28 03:11:38,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086833207] [2020-11-28 03:11:38,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:11:38,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:38,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:11:38,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:11:38,657 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 10 states. [2020-11-28 03:11:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:38,804 INFO L93 Difference]: Finished difference Result 84 states and 191 transitions. [2020-11-28 03:11:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:11:38,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-28 03:11:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:38,806 INFO L225 Difference]: With dead ends: 84 [2020-11-28 03:11:38,806 INFO L226 Difference]: Without dead ends: 78 [2020-11-28 03:11:38,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:11:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-28 03:11:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 52. [2020-11-28 03:11:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-28 03:11:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-28 03:11:38,810 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-28 03:11:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:38,810 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-28 03:11:38,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:11:38,810 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-28 03:11:38,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:11:38,811 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:38,811 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:39,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-28 03:11:39,020 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:39,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2046253209, now seen corresponding path program 15 times [2020-11-28 03:11:39,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:39,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969469959] [2020-11-28 03:11:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:39,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969469959] [2020-11-28 03:11:39,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879050823] [2020-11-28 03:11:39,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:39,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-28 03:11:39,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:39,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:11:39,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:39,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:39,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-28 03:11:39,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640274989] [2020-11-28 03:11:39,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:11:39,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:39,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:11:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:11:39,234 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-11-28 03:11:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:39,554 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-11-28 03:11:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:11:39,555 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-28 03:11:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:39,555 INFO L225 Difference]: With dead ends: 78 [2020-11-28 03:11:39,555 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 03:11:39,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:11:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 03:11:39,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2020-11-28 03:11:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 03:11:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-11-28 03:11:39,560 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 14 [2020-11-28 03:11:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:39,560 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-11-28 03:11:39,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:11:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-11-28 03:11:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:11:39,563 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:39,563 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:39,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-28 03:11:39,776 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:39,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:39,776 INFO L82 PathProgramCache]: Analyzing trace with hash 418503517, now seen corresponding path program 16 times [2020-11-28 03:11:39,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:39,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870852760] [2020-11-28 03:11:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:39,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870852760] [2020-11-28 03:11:39,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069511211] [2020-11-28 03:11:39,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:39,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:11:39,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:39,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:11:39,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:39,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:40,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:40,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-28 03:11:40,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080374045] [2020-11-28 03:11:40,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:11:40,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:40,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:11:40,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:11:40,004 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 11 states. [2020-11-28 03:11:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:40,320 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-28 03:11:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 03:11:40,320 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-28 03:11:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:40,321 INFO L225 Difference]: With dead ends: 73 [2020-11-28 03:11:40,321 INFO L226 Difference]: Without dead ends: 68 [2020-11-28 03:11:40,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-28 03:11:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-28 03:11:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2020-11-28 03:11:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-28 03:11:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-11-28 03:11:40,330 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-11-28 03:11:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:40,330 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-11-28 03:11:40,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:11:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-11-28 03:11:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:11:40,331 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:40,331 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:40,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 03:11:40,544 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:40,544 INFO L82 PathProgramCache]: Analyzing trace with hash -990634472, now seen corresponding path program 17 times [2020-11-28 03:11:40,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:40,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215857787] [2020-11-28 03:11:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:40,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215857787] [2020-11-28 03:11:40,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665916886] [2020-11-28 03:11:40,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:40,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-28 03:11:40,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:11:40,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:40,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:40,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:40,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-28 03:11:40,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735401693] [2020-11-28 03:11:40,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:11:40,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:40,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:11:40,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:11:40,835 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-11-28 03:11:41,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:41,223 INFO L93 Difference]: Finished difference Result 71 states and 171 transitions. [2020-11-28 03:11:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 03:11:41,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-28 03:11:41,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:41,224 INFO L225 Difference]: With dead ends: 71 [2020-11-28 03:11:41,224 INFO L226 Difference]: Without dead ends: 66 [2020-11-28 03:11:41,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-11-28 03:11:41,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-28 03:11:41,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2020-11-28 03:11:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-28 03:11:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-11-28 03:11:41,227 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-11-28 03:11:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:41,227 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-11-28 03:11:41,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:11:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-11-28 03:11:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:11:41,228 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:41,228 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:41,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:41,440 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:41,440 INFO L82 PathProgramCache]: Analyzing trace with hash 88729745, now seen corresponding path program 18 times [2020-11-28 03:11:41,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:41,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503419132] [2020-11-28 03:11:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:41,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503419132] [2020-11-28 03:11:41,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382464413] [2020-11-28 03:11:41,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:41,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-28 03:11:41,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:41,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:11:41,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:41,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 03:11:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:41,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:41,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-28 03:11:41,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550958810] [2020-11-28 03:11:41,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:11:41,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:41,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:11:41,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:11:41,683 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 12 states. [2020-11-28 03:11:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:42,036 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-28 03:11:42,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-28 03:11:42,044 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-28 03:11:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:42,045 INFO L225 Difference]: With dead ends: 83 [2020-11-28 03:11:42,045 INFO L226 Difference]: Without dead ends: 74 [2020-11-28 03:11:42,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-11-28 03:11:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-28 03:11:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-11-28 03:11:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-28 03:11:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-28 03:11:42,049 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-28 03:11:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:42,049 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-28 03:11:42,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:11:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-28 03:11:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:11:42,050 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:42,050 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:42,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:42,251 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:42,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:42,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1934326928, now seen corresponding path program 19 times [2020-11-28 03:11:42,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:42,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538371998] [2020-11-28 03:11:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:42,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538371998] [2020-11-28 03:11:42,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240917351] [2020-11-28 03:11:42,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:42,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 03:11:42,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:42,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:42,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:42,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-28 03:11:42,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118035876] [2020-11-28 03:11:42,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:11:42,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:42,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:11:42,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:11:42,492 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-11-28 03:11:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:42,684 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-28 03:11:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:11:42,685 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-28 03:11:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:42,686 INFO L225 Difference]: With dead ends: 72 [2020-11-28 03:11:42,686 INFO L226 Difference]: Without dead ends: 66 [2020-11-28 03:11:42,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:11:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-28 03:11:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-28 03:11:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-28 03:11:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-28 03:11:42,689 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-28 03:11:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:42,689 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-28 03:11:42,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:11:42,689 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-28 03:11:42,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:11:42,690 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:42,690 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:42,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-28 03:11:42,896 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:42,896 INFO L82 PathProgramCache]: Analyzing trace with hash -713341088, now seen corresponding path program 20 times [2020-11-28 03:11:42,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:42,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995555820] [2020-11-28 03:11:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:43,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995555820] [2020-11-28 03:11:43,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723281852] [2020-11-28 03:11:43,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:43,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:11:43,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:43,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:11:43,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:43,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:43,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-28 03:11:43,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890445057] [2020-11-28 03:11:43,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:11:43,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:11:43,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:11:43,140 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 12 states. [2020-11-28 03:11:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:43,322 INFO L93 Difference]: Finished difference Result 96 states and 219 transitions. [2020-11-28 03:11:43,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 03:11:43,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-28 03:11:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:43,324 INFO L225 Difference]: With dead ends: 96 [2020-11-28 03:11:43,324 INFO L226 Difference]: Without dead ends: 90 [2020-11-28 03:11:43,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:11:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-28 03:11:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-11-28 03:11:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-28 03:11:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-28 03:11:43,327 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-28 03:11:43,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:43,329 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-28 03:11:43,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:11:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-28 03:11:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:11:43,330 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:43,330 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:43,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:43,540 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:43,540 INFO L82 PathProgramCache]: Analyzing trace with hash -644874954, now seen corresponding path program 21 times [2020-11-28 03:11:43,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:43,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596564551] [2020-11-28 03:11:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:43,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596564551] [2020-11-28 03:11:43,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594740503] [2020-11-28 03:11:43,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:43,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-28 03:11:43,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:43,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 03:11:43,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:43,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:43,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-28 03:11:43,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998526851] [2020-11-28 03:11:43,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:11:43,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:43,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:11:43,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:11:43,820 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-11-28 03:11:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:44,220 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-11-28 03:11:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-28 03:11:44,220 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-28 03:11:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:44,221 INFO L225 Difference]: With dead ends: 88 [2020-11-28 03:11:44,221 INFO L226 Difference]: Without dead ends: 79 [2020-11-28 03:11:44,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-11-28 03:11:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-28 03:11:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2020-11-28 03:11:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-28 03:11:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 123 transitions. [2020-11-28 03:11:44,224 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 123 transitions. Word has length 16 [2020-11-28 03:11:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:44,225 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 123 transitions. [2020-11-28 03:11:44,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:11:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 123 transitions. [2020-11-28 03:11:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:11:44,226 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:44,226 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:44,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-28 03:11:44,436 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:44,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1544319712, now seen corresponding path program 22 times [2020-11-28 03:11:44,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:44,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089228513] [2020-11-28 03:11:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:44,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089228513] [2020-11-28 03:11:44,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93573767] [2020-11-28 03:11:44,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:44,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:11:44,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:44,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:11:44,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:44,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:44,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:44,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-28 03:11:44,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481233229] [2020-11-28 03:11:44,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:11:44,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:44,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:11:44,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:11:44,711 INFO L87 Difference]: Start difference. First operand 51 states and 123 transitions. Second operand 13 states. [2020-11-28 03:11:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:45,091 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-28 03:11:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-28 03:11:45,092 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-28 03:11:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:45,092 INFO L225 Difference]: With dead ends: 83 [2020-11-28 03:11:45,092 INFO L226 Difference]: Without dead ends: 78 [2020-11-28 03:11:45,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-28 03:11:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-28 03:11:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2020-11-28 03:11:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-28 03:11:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-11-28 03:11:45,095 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-11-28 03:11:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:45,095 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-11-28 03:11:45,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:11:45,096 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-11-28 03:11:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 03:11:45,096 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:45,096 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:45,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-28 03:11:45,297 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:45,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1483738395, now seen corresponding path program 23 times [2020-11-28 03:11:45,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:45,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644001127] [2020-11-28 03:11:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:45,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644001127] [2020-11-28 03:11:45,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336879559] [2020-11-28 03:11:45,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:45,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-28 03:11:45,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:45,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 03:11:45,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:45,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:45,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:45,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-28 03:11:45,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088675504] [2020-11-28 03:11:45,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:11:45,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:45,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:11:45,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:11:45,550 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-11-28 03:11:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:45,944 INFO L93 Difference]: Finished difference Result 79 states and 191 transitions. [2020-11-28 03:11:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-28 03:11:45,944 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-28 03:11:45,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:45,945 INFO L225 Difference]: With dead ends: 79 [2020-11-28 03:11:45,945 INFO L226 Difference]: Without dead ends: 74 [2020-11-28 03:11:45,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-28 03:11:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-28 03:11:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-11-28 03:11:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-28 03:11:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-28 03:11:45,948 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-11-28 03:11:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:45,949 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-28 03:11:45,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:11:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-28 03:11:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 03:11:45,949 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:45,949 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:46,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-28 03:11:46,164 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash -629248210, now seen corresponding path program 24 times [2020-11-28 03:11:46,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:46,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900536277] [2020-11-28 03:11:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:46,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900536277] [2020-11-28 03:11:46,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171958724] [2020-11-28 03:11:46,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:46,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-28 03:11:46,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 03:11:46,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:46,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 03:11:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:46,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:46,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-28 03:11:46,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477633545] [2020-11-28 03:11:46,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:11:46,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:46,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:11:46,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:11:46,425 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 14 states. [2020-11-28 03:11:46,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:46,902 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-28 03:11:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-28 03:11:46,902 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-28 03:11:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:46,903 INFO L225 Difference]: With dead ends: 93 [2020-11-28 03:11:46,903 INFO L226 Difference]: Without dead ends: 84 [2020-11-28 03:11:46,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-28 03:11:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-28 03:11:46,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-11-28 03:11:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-28 03:11:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-28 03:11:46,906 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-28 03:11:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:46,906 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-28 03:11:46,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:11:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-28 03:11:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:11:46,907 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:46,907 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:47,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-28 03:11:47,120 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:47,120 INFO L82 PathProgramCache]: Analyzing trace with hash 832673395, now seen corresponding path program 25 times [2020-11-28 03:11:47,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:47,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078057081] [2020-11-28 03:11:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:47,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078057081] [2020-11-28 03:11:47,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737966482] [2020-11-28 03:11:47,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/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 [2020-11-28 03:11:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:47,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:11:47,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:47,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:47,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:47,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-28 03:11:47,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858419028] [2020-11-28 03:11:47,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:11:47,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:47,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:11:47,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:11:47,377 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-11-28 03:11:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:47,629 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-28 03:11:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:11:47,630 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-28 03:11:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:47,631 INFO L225 Difference]: With dead ends: 80 [2020-11-28 03:11:47,631 INFO L226 Difference]: Without dead ends: 74 [2020-11-28 03:11:47,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-11-28 03:11:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-28 03:11:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-11-28 03:11:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-28 03:11:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-28 03:11:47,633 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-28 03:11:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:47,633 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-28 03:11:47,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:11:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-28 03:11:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:11:47,634 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:47,634 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:47,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-28 03:11:47,844 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:47,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1673993827, now seen corresponding path program 26 times [2020-11-28 03:11:47,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:47,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347286136] [2020-11-28 03:11:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:48,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347286136] [2020-11-28 03:11:48,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185831051] [2020-11-28 03:11:48,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:48,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:11:48,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:48,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:11:48,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:48,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:48,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-28 03:11:48,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105744590] [2020-11-28 03:11:48,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:11:48,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:48,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:11:48,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:11:48,125 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 14 states. [2020-11-28 03:11:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:48,365 INFO L93 Difference]: Finished difference Result 108 states and 247 transitions. [2020-11-28 03:11:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 03:11:48,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-28 03:11:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:48,370 INFO L225 Difference]: With dead ends: 108 [2020-11-28 03:11:48,370 INFO L226 Difference]: Without dead ends: 102 [2020-11-28 03:11:48,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-11-28 03:11:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-28 03:11:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2020-11-28 03:11:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-28 03:11:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-28 03:11:48,373 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-28 03:11:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:48,373 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-28 03:11:48,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:11:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-28 03:11:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:11:48,373 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:48,373 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:48,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:48,574 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:48,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:48,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1248727405, now seen corresponding path program 27 times [2020-11-28 03:11:48,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:48,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706588200] [2020-11-28 03:11:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:48,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706588200] [2020-11-28 03:11:48,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59488287] [2020-11-28 03:11:48,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:48,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-28 03:11:48,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:48,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:11:48,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:48,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 03:11:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:48,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:48,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-28 03:11:48,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315505335] [2020-11-28 03:11:48,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-28 03:11:48,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:48,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:11:48,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:11:48,815 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-11-28 03:11:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:49,411 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-11-28 03:11:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-28 03:11:49,412 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-28 03:11:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:49,413 INFO L225 Difference]: With dead ends: 98 [2020-11-28 03:11:49,413 INFO L226 Difference]: Without dead ends: 89 [2020-11-28 03:11:49,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-11-28 03:11:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-28 03:11:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 55. [2020-11-28 03:11:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-28 03:11:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 133 transitions. [2020-11-28 03:11:49,416 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 133 transitions. Word has length 18 [2020-11-28 03:11:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:49,416 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 133 transitions. [2020-11-28 03:11:49,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-28 03:11:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 133 transitions. [2020-11-28 03:11:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:11:49,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:49,417 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:49,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-28 03:11:49,632 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:49,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1968167459, now seen corresponding path program 28 times [2020-11-28 03:11:49,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:49,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626581430] [2020-11-28 03:11:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:49,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626581430] [2020-11-28 03:11:49,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328864714] [2020-11-28 03:11:49,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:49,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:11:49,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:49,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:11:49,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:49,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:11:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:49,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:49,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-28 03:11:49,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159278267] [2020-11-28 03:11:49,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-28 03:11:49,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:49,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:11:49,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:11:49,916 INFO L87 Difference]: Start difference. First operand 55 states and 133 transitions. Second operand 15 states. [2020-11-28 03:11:50,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:50,460 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-28 03:11:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-28 03:11:50,467 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-28 03:11:50,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:50,468 INFO L225 Difference]: With dead ends: 93 [2020-11-28 03:11:50,468 INFO L226 Difference]: Without dead ends: 88 [2020-11-28 03:11:50,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-28 03:11:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-28 03:11:50,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-11-28 03:11:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-28 03:11:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-11-28 03:11:50,472 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-11-28 03:11:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:50,472 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-11-28 03:11:50,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-28 03:11:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-11-28 03:11:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 03:11:50,473 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:50,473 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:50,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:50,688 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:50,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:50,688 INFO L82 PathProgramCache]: Analyzing trace with hash -55818402, now seen corresponding path program 29 times [2020-11-28 03:11:50,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:50,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092910116] [2020-11-28 03:11:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:50,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092910116] [2020-11-28 03:11:50,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158741249] [2020-11-28 03:11:50,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:50,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-28 03:11:50,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:50,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:11:50,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:50,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:11:50,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-11-28 03:11:50,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185712040] [2020-11-28 03:11:50,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:11:50,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:50,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:11:50,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:11:50,872 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 8 states. [2020-11-28 03:11:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:50,896 INFO L93 Difference]: Finished difference Result 149 states and 334 transitions. [2020-11-28 03:11:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:11:50,897 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-28 03:11:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:50,897 INFO L225 Difference]: With dead ends: 149 [2020-11-28 03:11:50,897 INFO L226 Difference]: Without dead ends: 44 [2020-11-28 03:11:50,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:11:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-28 03:11:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-28 03:11:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 03:11:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 84 transitions. [2020-11-28 03:11:50,900 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 84 transitions. Word has length 19 [2020-11-28 03:11:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:50,900 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 84 transitions. [2020-11-28 03:11:50,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:11:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 84 transitions. [2020-11-28 03:11:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 03:11:50,900 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:50,901 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:51,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-28 03:11:51,116 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:51,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:51,116 INFO L82 PathProgramCache]: Analyzing trace with hash 883671691, now seen corresponding path program 30 times [2020-11-28 03:11:51,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:51,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888032131] [2020-11-28 03:11:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:51,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888032131] [2020-11-28 03:11:51,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180982122] [2020-11-28 03:11:51,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:51,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-28 03:11:51,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:51,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:11:51,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:51,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:11:51,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-11-28 03:11:51,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977301765] [2020-11-28 03:11:51,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:11:51,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:51,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:11:51,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:11:51,274 INFO L87 Difference]: Start difference. First operand 44 states and 84 transitions. Second operand 8 states. [2020-11-28 03:11:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:51,301 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2020-11-28 03:11:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:11:51,301 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-28 03:11:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:51,302 INFO L225 Difference]: With dead ends: 72 [2020-11-28 03:11:51,302 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:11:51,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:11:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:11:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:11:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:11:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:11:51,302 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-28 03:11:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:51,303 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:11:51,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:11:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:11:51,303 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:11:51,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:51,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:11:51 BasicIcfg [2020-11-28 03:11:51,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:11:51,506 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:11:51,506 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:11:51,506 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:11:51,507 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:28" (3/4) ... [2020-11-28 03:11:51,510 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:11:51,520 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2020-11-28 03:11:51,520 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2020-11-28 03:11:51,523 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-28 03:11:51,524 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:11:51,524 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 03:11:51,524 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:11:51,556 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_10146085-ca28-469d-a620-7b5d1efeefb0/bin/uautomizer/witness.graphml [2020-11-28 03:11:51,556 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:11:51,557 INFO L168 Benchmark]: Toolchain (without parser) took 24038.00 ms. Allocated memory was 86.0 MB in the beginning and 220.2 MB in the end (delta: 134.2 MB). Free memory was 53.6 MB in the beginning and 194.9 MB in the end (delta: -141.3 MB). Peak memory consumption was 121.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:51,557 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory was 45.4 MB in the beginning and 45.4 MB in the end (delta: 56.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:11:51,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 554.72 ms. Allocated memory is still 86.0 MB. Free memory was 53.4 MB in the beginning and 45.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:51,558 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.96 ms. Allocated memory is still 86.0 MB. Free memory was 45.0 MB in the beginning and 43.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:51,559 INFO L168 Benchmark]: Boogie Preprocessor took 27.69 ms. Allocated memory is still 86.0 MB. Free memory was 43.3 MB in the beginning and 41.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:11:51,559 INFO L168 Benchmark]: RCFGBuilder took 487.50 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 41.9 MB in the beginning and 70.5 MB in the end (delta: -28.6 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:51,560 INFO L168 Benchmark]: TraceAbstraction took 22864.57 ms. Allocated memory was 104.9 MB in the beginning and 220.2 MB in the end (delta: 115.3 MB). Free memory was 70.5 MB in the beginning and 66.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 118.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:51,560 INFO L168 Benchmark]: Witness Printer took 49.69 ms. Allocated memory is still 220.2 MB. Free memory was 66.8 MB in the beginning and 194.9 MB in the end (delta: -128.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:51,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory was 45.4 MB in the beginning and 45.4 MB in the end (delta: 56.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 554.72 ms. Allocated memory is still 86.0 MB. Free memory was 53.4 MB in the beginning and 45.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.96 ms. Allocated memory is still 86.0 MB. Free memory was 45.0 MB in the beginning and 43.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.69 ms. Allocated memory is still 86.0 MB. Free memory was 43.3 MB in the beginning and 41.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 487.50 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 41.9 MB in the beginning and 70.5 MB in the end (delta: -28.6 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22864.57 ms. Allocated memory was 104.9 MB in the beginning and 220.2 MB in the end (delta: 115.3 MB). Free memory was 70.5 MB in the beginning and 66.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 118.4 MB. Max. memory is 16.1 GB. * Witness Printer took 49.69 ms. Allocated memory is still 220.2 MB. Free memory was 66.8 MB in the beginning and 194.9 MB in the end (delta: -128.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 751 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 13 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 10 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.1s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 60 TotalNumberOfCompositions, 1062 MoverChecksTotal - PositiveResult [Line: 693]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.7s, OverallIterations: 32, TraceHistogramMax: 6, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 499 SDtfs, 1319 SDslu, 1478 SDs, 0 SdLazy, 1623 SolverSat, 778 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 899 GetRequests, 329 SyntacticMatches, 20 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 7.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 32 MinimizatonAttempts, 503 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 834 NumberOfCodeBlocks, 834 NumberOfCodeBlocksAsserted, 106 NumberOfCheckSat, 776 ConstructedInterpolants, 0 QuantifiedInterpolants, 46590 SizeOfPredicates, 164 NumberOfNonLiveVariables, 2938 ConjunctsInSsa, 277 ConjunctsInUnsatCore, 58 InterpolantComputations, 8 PerfectInterpolantSequences, 82/540 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...