./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.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_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 becf68b1b41bf8f9c75117f82605e436bc8d5a41 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 22:51:28,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:51:28,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:51:28,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:51:28,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:51:28,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:51:28,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:51:28,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:51:28,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:51:28,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:51:28,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:51:28,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:51:28,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:51:28,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:51:28,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:51:28,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:51:28,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:51:28,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:51:28,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:51:28,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:51:28,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:51:28,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:51:28,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:51:28,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:51:28,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:51:28,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:51:28,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:51:28,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:51:28,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:51:28,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:51:28,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:51:28,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:51:28,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:51:28,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:51:28,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:51:28,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:51:28,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:51:28,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:51:28,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:51:28,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:51:28,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:51:28,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 22:51:28,223 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:51:28,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:51:28,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:51:28,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:51:28,226 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:51:28,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:51:28,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:51:28,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:51:28,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:51:28,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:51:28,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:51:28,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:51:28,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:51:28,228 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:51:28,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:51:28,228 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:51:28,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:51:28,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:51:28,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:51:28,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:51:28,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:51:28,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:51:28,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:51:28,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:51:28,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:51:28,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:51:28,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:51:28,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:51:28,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:51:28,232 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_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> becf68b1b41bf8f9c75117f82605e436bc8d5a41 [2020-11-29 22:51:28,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:51:28,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:51:28,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:51:28,578 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:51:28,579 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:51:28,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2020-11-29 22:51:28,658 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/data/c1e75c6da/90eab8dc71a14b06ba397d83150681eb/FLAG0f5b15dc2 [2020-11-29 22:51:29,136 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:51:29,137 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2020-11-29 22:51:29,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/data/c1e75c6da/90eab8dc71a14b06ba397d83150681eb/FLAG0f5b15dc2 [2020-11-29 22:51:29,504 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/data/c1e75c6da/90eab8dc71a14b06ba397d83150681eb [2020-11-29 22:51:29,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:51:29,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:51:29,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:51:29,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:51:29,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:51:29,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:51:29" (1/1) ... [2020-11-29 22:51:29,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d952947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29, skipping insertion in model container [2020-11-29 22:51:29,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:51:29" (1/1) ... [2020-11-29 22:51:29,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:51:29,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:51:29,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:51:29,736 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:51:29,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:51:29,765 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:51:29,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29 WrapperNode [2020-11-29 22:51:29,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:51:29,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:51:29,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:51:29,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:51:29,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29" (1/1) ... [2020-11-29 22:51:29,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29" (1/1) ... [2020-11-29 22:51:29,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:51:29,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:51:29,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:51:29,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:51:29,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29" (1/1) ... [2020-11-29 22:51:29,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29" (1/1) ... [2020-11-29 22:51:29,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29" (1/1) ... [2020-11-29 22:51:29,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29" (1/1) ... [2020-11-29 22:51:29,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29" (1/1) ... [2020-11-29 22:51:29,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29" (1/1) ... [2020-11-29 22:51:29,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29" (1/1) ... [2020-11-29 22:51:29,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:51:29,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:51:29,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:51:29,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:51:29,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:29,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:51:29,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:51:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:51:29,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:51:30,208 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:51:30,209 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 22:51:30,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:51:30 BoogieIcfgContainer [2020-11-29 22:51:30,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:51:30,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:51:30,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:51:30,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:51:30,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:51:29" (1/3) ... [2020-11-29 22:51:30,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57215e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:51:30, skipping insertion in model container [2020-11-29 22:51:30,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:51:29" (2/3) ... [2020-11-29 22:51:30,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57215e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:51:30, skipping insertion in model container [2020-11-29 22:51:30,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:51:30" (3/3) ... [2020-11-29 22:51:30,220 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.i [2020-11-29 22:51:30,231 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:51:30,235 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 22:51:30,246 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 22:51:30,269 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:51:30,269 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:51:30,269 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:51:30,270 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:51:30,270 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:51:30,270 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:51:30,270 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:51:30,270 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:51:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-29 22:51:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 22:51:30,300 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:30,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:30,301 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:30,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:30,307 INFO L82 PathProgramCache]: Analyzing trace with hash 185199154, now seen corresponding path program 1 times [2020-11-29 22:51:30,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:30,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784205860] [2020-11-29 22:51:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:30,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784205860] [2020-11-29 22:51:30,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:51:30,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:51:30,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831104632] [2020-11-29 22:51:30,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 22:51:30,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:30,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 22:51:30,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:51:30,482 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-29 22:51:30,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:30,497 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2020-11-29 22:51:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 22:51:30,498 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-29 22:51:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:30,506 INFO L225 Difference]: With dead ends: 22 [2020-11-29 22:51:30,506 INFO L226 Difference]: Without dead ends: 9 [2020-11-29 22:51:30,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:51:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-29 22:51:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-29 22:51:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 22:51:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-11-29 22:51:30,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 8 [2020-11-29 22:51:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:30,540 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-11-29 22:51:30,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 22:51:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-11-29 22:51:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 22:51:30,541 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:30,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:30,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:51:30,541 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:30,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:30,543 INFO L82 PathProgramCache]: Analyzing trace with hash 181505070, now seen corresponding path program 1 times [2020-11-29 22:51:30,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:30,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588494960] [2020-11-29 22:51:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:30,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588494960] [2020-11-29 22:51:30,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:51:30,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:51:30,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726767406] [2020-11-29 22:51:30,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:51:30,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:51:30,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:51:30,614 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2020-11-29 22:51:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:30,646 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-29 22:51:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:51:30,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-29 22:51:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:30,653 INFO L225 Difference]: With dead ends: 15 [2020-11-29 22:51:30,653 INFO L226 Difference]: Without dead ends: 10 [2020-11-29 22:51:30,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:51:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-29 22:51:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-29 22:51:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 22:51:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-29 22:51:30,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-11-29 22:51:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:30,658 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-29 22:51:30,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:51:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-29 22:51:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 22:51:30,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:30,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:30,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 22:51:30,660 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:30,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:30,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1383312870, now seen corresponding path program 1 times [2020-11-29 22:51:30,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:30,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216113443] [2020-11-29 22:51:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:30,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216113443] [2020-11-29 22:51:30,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141299593] [2020-11-29 22:51:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:30,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 22:51:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:30,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:30,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-11-29 22:51:30,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078172203] [2020-11-29 22:51:30,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 22:51:30,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:30,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:51:30,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:51:30,920 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2020-11-29 22:51:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:30,950 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-29 22:51:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:51:30,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-29 22:51:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:30,951 INFO L225 Difference]: With dead ends: 16 [2020-11-29 22:51:30,951 INFO L226 Difference]: Without dead ends: 11 [2020-11-29 22:51:30,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:51:30,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-29 22:51:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-29 22:51:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 22:51:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-29 22:51:30,954 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-11-29 22:51:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:30,955 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-29 22:51:30,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 22:51:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-29 22:51:30,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 22:51:30,955 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:30,955 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:31,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 22:51:31,156 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:31,157 INFO L82 PathProgramCache]: Analyzing trace with hash -15350994, now seen corresponding path program 2 times [2020-11-29 22:51:31,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:31,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6531669] [2020-11-29 22:51:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:31,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6531669] [2020-11-29 22:51:31,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844742840] [2020-11-29 22:51:31,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:31,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:51:31,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:31,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:51:31,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:31,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:31,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 22:51:31,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736971948] [2020-11-29 22:51:31,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:51:31,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:31,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:51:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:51:31,317 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2020-11-29 22:51:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:31,343 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-11-29 22:51:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:51:31,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 22:51:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:31,344 INFO L225 Difference]: With dead ends: 17 [2020-11-29 22:51:31,344 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 22:51:31,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:51:31,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 22:51:31,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 22:51:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 22:51:31,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-29 22:51:31,347 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-11-29 22:51:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:31,347 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-29 22:51:31,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:51:31,347 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-29 22:51:31,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 22:51:31,348 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:31,348 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:31,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:31,559 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:31,559 INFO L82 PathProgramCache]: Analyzing trace with hash -424257818, now seen corresponding path program 3 times [2020-11-29 22:51:31,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:31,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856823850] [2020-11-29 22:51:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:31,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856823850] [2020-11-29 22:51:31,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165997639] [2020-11-29 22:51:31,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:31,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 22:51:31,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:31,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:51:31,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:31,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:31,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 22:51:31,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853302515] [2020-11-29 22:51:31,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:51:31,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:31,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:51:31,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:51:31,824 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-11-29 22:51:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:31,846 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-11-29 22:51:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:51:31,847 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-29 22:51:31,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:31,848 INFO L225 Difference]: With dead ends: 18 [2020-11-29 22:51:31,848 INFO L226 Difference]: Without dead ends: 13 [2020-11-29 22:51:31,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:51:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-29 22:51:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-29 22:51:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 22:51:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-11-29 22:51:31,852 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-11-29 22:51:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:31,852 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-11-29 22:51:31,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:51:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-11-29 22:51:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 22:51:31,853 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:31,853 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:32,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:32,070 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:32,071 INFO L82 PathProgramCache]: Analyzing trace with hash -215467474, now seen corresponding path program 4 times [2020-11-29 22:51:32,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:32,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702230627] [2020-11-29 22:51:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:32,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702230627] [2020-11-29 22:51:32,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022021952] [2020-11-29 22:51:32,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:32,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:51:32,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:32,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 22:51:32,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:32,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:32,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-29 22:51:32,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061065275] [2020-11-29 22:51:32,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 22:51:32,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:32,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 22:51:32,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:51:32,287 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-11-29 22:51:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:32,315 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-11-29 22:51:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:51:32,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-11-29 22:51:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:32,317 INFO L225 Difference]: With dead ends: 19 [2020-11-29 22:51:32,317 INFO L226 Difference]: Without dead ends: 14 [2020-11-29 22:51:32,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:51:32,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-29 22:51:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-29 22:51:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 22:51:32,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-29 22:51:32,320 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-11-29 22:51:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:32,321 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-29 22:51:32,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 22:51:32,321 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-29 22:51:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 22:51:32,321 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:32,321 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:32,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:32,531 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:32,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:32,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1962065894, now seen corresponding path program 5 times [2020-11-29 22:51:32,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:32,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842031770] [2020-11-29 22:51:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:32,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842031770] [2020-11-29 22:51:32,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021469960] [2020-11-29 22:51:32,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:32,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-29 22:51:32,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:32,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:51:32,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:32,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:32,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 22:51:32,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147574332] [2020-11-29 22:51:32,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:51:32,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:32,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:51:32,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:51:32,762 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-11-29 22:51:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:32,792 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-11-29 22:51:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:51:32,794 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-11-29 22:51:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:32,794 INFO L225 Difference]: With dead ends: 20 [2020-11-29 22:51:32,794 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 22:51:32,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:51:32,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 22:51:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-29 22:51:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 22:51:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-29 22:51:32,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-11-29 22:51:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:32,799 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-29 22:51:32,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:51:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-29 22:51:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 22:51:32,800 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:32,800 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:33,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 22:51:33,023 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:33,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash 746123566, now seen corresponding path program 6 times [2020-11-29 22:51:33,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:33,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542045891] [2020-11-29 22:51:33,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:33,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542045891] [2020-11-29 22:51:33,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304966466] [2020-11-29 22:51:33,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:33,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-29 22:51:33,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 22:51:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:33,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:33,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-29 22:51:33,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665721484] [2020-11-29 22:51:33,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:51:33,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:33,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:51:33,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:51:33,258 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-11-29 22:51:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:33,294 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-11-29 22:51:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:51:33,295 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-11-29 22:51:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:33,296 INFO L225 Difference]: With dead ends: 21 [2020-11-29 22:51:33,296 INFO L226 Difference]: Without dead ends: 16 [2020-11-29 22:51:33,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:51:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-29 22:51:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-29 22:51:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 22:51:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-29 22:51:33,300 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-11-29 22:51:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:33,300 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-29 22:51:33,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:51:33,300 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-29 22:51:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 22:51:33,301 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:33,301 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:33,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:33,502 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:33,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1706617062, now seen corresponding path program 7 times [2020-11-29 22:51:33,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:33,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684520814] [2020-11-29 22:51:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:33,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684520814] [2020-11-29 22:51:33,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393609812] [2020-11-29 22:51:33,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:33,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 22:51:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:33,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:33,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 22:51:33,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757315762] [2020-11-29 22:51:33,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 22:51:33,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:33,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 22:51:33,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 22:51:33,703 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-11-29 22:51:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:33,731 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-11-29 22:51:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:51:33,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-11-29 22:51:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:33,733 INFO L225 Difference]: With dead ends: 22 [2020-11-29 22:51:33,733 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 22:51:33,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 22:51:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 22:51:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-29 22:51:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 22:51:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-11-29 22:51:33,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-11-29 22:51:33,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:33,737 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-11-29 22:51:33,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 22:51:33,737 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-11-29 22:51:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 22:51:33,738 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:33,738 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:33,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:33,939 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:33,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:33,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1417144366, now seen corresponding path program 8 times [2020-11-29 22:51:33,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:33,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617617804] [2020-11-29 22:51:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:34,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617617804] [2020-11-29 22:51:34,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487352766] [2020-11-29 22:51:34,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:34,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:51:34,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:34,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 22:51:34,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:34,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:34,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-29 22:51:34,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994984975] [2020-11-29 22:51:34,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 22:51:34,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:34,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 22:51:34,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:51:34,131 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 11 states. [2020-11-29 22:51:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:34,162 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-11-29 22:51:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:51:34,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-11-29 22:51:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:34,164 INFO L225 Difference]: With dead ends: 23 [2020-11-29 22:51:34,164 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 22:51:34,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:51:34,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 22:51:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-29 22:51:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 22:51:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-29 22:51:34,169 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-11-29 22:51:34,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:34,170 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-29 22:51:34,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 22:51:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-29 22:51:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 22:51:34,171 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:34,171 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:34,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 22:51:34,383 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1033425382, now seen corresponding path program 9 times [2020-11-29 22:51:34,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:34,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510403066] [2020-11-29 22:51:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:34,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510403066] [2020-11-29 22:51:34,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518988321] [2020-11-29 22:51:34,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:34,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 22:51:34,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:51:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:34,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:34,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-29 22:51:34,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737978520] [2020-11-29 22:51:34,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 22:51:34,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:34,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 22:51:34,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:51:34,657 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 12 states. [2020-11-29 22:51:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:34,714 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-11-29 22:51:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 22:51:34,714 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-11-29 22:51:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:34,715 INFO L225 Difference]: With dead ends: 24 [2020-11-29 22:51:34,715 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 22:51:34,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:51:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 22:51:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-29 22:51:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-29 22:51:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-11-29 22:51:34,719 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-11-29 22:51:34,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:34,719 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-11-29 22:51:34,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 22:51:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-11-29 22:51:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 22:51:34,720 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:34,720 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:34,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:34,938 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:34,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2023038766, now seen corresponding path program 10 times [2020-11-29 22:51:34,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:34,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329516375] [2020-11-29 22:51:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:35,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329516375] [2020-11-29 22:51:35,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385862623] [2020-11-29 22:51:35,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:35,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:51:35,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:35,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 22:51:35,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:35,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:35,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-11-29 22:51:35,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850270382] [2020-11-29 22:51:35,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 22:51:35,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 22:51:35,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:51:35,201 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 13 states. [2020-11-29 22:51:35,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:35,236 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-11-29 22:51:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 22:51:35,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2020-11-29 22:51:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:35,238 INFO L225 Difference]: With dead ends: 25 [2020-11-29 22:51:35,238 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 22:51:35,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:51:35,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 22:51:35,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-29 22:51:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 22:51:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-11-29 22:51:35,242 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-11-29 22:51:35,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:35,243 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-11-29 22:51:35,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 22:51:35,243 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-11-29 22:51:35,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 22:51:35,244 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:35,244 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:35,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:35,445 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:35,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:35,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1658684698, now seen corresponding path program 11 times [2020-11-29 22:51:35,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:35,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402604951] [2020-11-29 22:51:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:35,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402604951] [2020-11-29 22:51:35,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653843259] [2020-11-29 22:51:35,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:35,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-29 22:51:35,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:35,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 22:51:35,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:35,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:35,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-29 22:51:35,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389450012] [2020-11-29 22:51:35,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 22:51:35,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 22:51:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-29 22:51:35,735 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 14 states. [2020-11-29 22:51:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:35,778 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-11-29 22:51:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 22:51:35,780 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-11-29 22:51:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:35,780 INFO L225 Difference]: With dead ends: 26 [2020-11-29 22:51:35,780 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 22:51:35,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-29 22:51:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 22:51:35,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-29 22:51:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 22:51:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-11-29 22:51:35,784 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-11-29 22:51:35,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:35,784 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-11-29 22:51:35,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 22:51:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-11-29 22:51:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 22:51:35,785 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:35,785 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:35,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 22:51:35,998 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:35,999 INFO L82 PathProgramCache]: Analyzing trace with hash 172004910, now seen corresponding path program 12 times [2020-11-29 22:51:35,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:35,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77169593] [2020-11-29 22:51:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:36,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77169593] [2020-11-29 22:51:36,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356695563] [2020-11-29 22:51:36,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:36,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 22:51:36,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:36,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 22:51:36,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:36,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:36,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-11-29 22:51:36,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910473291] [2020-11-29 22:51:36,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 22:51:36,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:36,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 22:51:36,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-29 22:51:36,264 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 15 states. [2020-11-29 22:51:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:36,328 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-11-29 22:51:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 22:51:36,328 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-11-29 22:51:36,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:36,329 INFO L225 Difference]: With dead ends: 27 [2020-11-29 22:51:36,329 INFO L226 Difference]: Without dead ends: 22 [2020-11-29 22:51:36,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-29 22:51:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-29 22:51:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-29 22:51:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 22:51:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-11-29 22:51:36,333 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-11-29 22:51:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:36,333 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-11-29 22:51:36,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 22:51:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-11-29 22:51:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 22:51:36,334 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:36,334 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:36,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 22:51:36,538 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:36,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:36,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1088807910, now seen corresponding path program 13 times [2020-11-29 22:51:36,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:36,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521082426] [2020-11-29 22:51:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:36,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521082426] [2020-11-29 22:51:36,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924216010] [2020-11-29 22:51:36,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:36,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 22:51:36,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:36,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:36,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-29 22:51:36,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073098489] [2020-11-29 22:51:36,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 22:51:36,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:36,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 22:51:36,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-29 22:51:36,846 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 16 states. [2020-11-29 22:51:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:36,895 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-11-29 22:51:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 22:51:36,898 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-11-29 22:51:36,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:36,898 INFO L225 Difference]: With dead ends: 28 [2020-11-29 22:51:36,898 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 22:51:36,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-29 22:51:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 22:51:36,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-29 22:51:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 22:51:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-11-29 22:51:36,902 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-11-29 22:51:36,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:36,903 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-11-29 22:51:36,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 22:51:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-11-29 22:51:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 22:51:36,903 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:36,903 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:37,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 22:51:37,104 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:37,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:37,104 INFO L82 PathProgramCache]: Analyzing trace with hash -555070162, now seen corresponding path program 14 times [2020-11-29 22:51:37,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:37,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038252703] [2020-11-29 22:51:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:37,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038252703] [2020-11-29 22:51:37,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832678235] [2020-11-29 22:51:37,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:37,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:51:37,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:37,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 22:51:37,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:37,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:37,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-11-29 22:51:37,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489127711] [2020-11-29 22:51:37,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 22:51:37,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:37,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 22:51:37,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-29 22:51:37,381 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 17 states. [2020-11-29 22:51:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:37,424 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-11-29 22:51:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 22:51:37,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2020-11-29 22:51:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:37,425 INFO L225 Difference]: With dead ends: 29 [2020-11-29 22:51:37,425 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 22:51:37,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-29 22:51:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 22:51:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 22:51:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 22:51:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-11-29 22:51:37,429 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-11-29 22:51:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:37,429 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-11-29 22:51:37,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 22:51:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-11-29 22:51:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 22:51:37,430 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:37,430 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:37,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:37,630 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash 24317158, now seen corresponding path program 15 times [2020-11-29 22:51:37,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:37,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419089657] [2020-11-29 22:51:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:37,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419089657] [2020-11-29 22:51:37,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289964384] [2020-11-29 22:51:37,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:37,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-29 22:51:37,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 22:51:37,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:37,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:37,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-29 22:51:37,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249170793] [2020-11-29 22:51:37,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 22:51:37,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:37,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 22:51:37,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:51:37,952 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 18 states. [2020-11-29 22:51:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:38,019 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-11-29 22:51:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 22:51:38,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-11-29 22:51:38,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:38,020 INFO L225 Difference]: With dead ends: 30 [2020-11-29 22:51:38,021 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 22:51:38,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:51:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 22:51:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-29 22:51:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 22:51:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-11-29 22:51:38,025 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-11-29 22:51:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:38,025 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-11-29 22:51:38,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 22:51:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-11-29 22:51:38,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 22:51:38,026 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:38,026 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:38,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 22:51:38,236 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:38,236 INFO L82 PathProgramCache]: Analyzing trace with hash 805454894, now seen corresponding path program 16 times [2020-11-29 22:51:38,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:38,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450914511] [2020-11-29 22:51:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:38,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450914511] [2020-11-29 22:51:38,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586802116] [2020-11-29 22:51:38,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:38,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:51:38,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:38,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 22:51:38,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:38,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:38,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-29 22:51:38,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394265292] [2020-11-29 22:51:38,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 22:51:38,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:38,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 22:51:38,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-29 22:51:38,634 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 19 states. [2020-11-29 22:51:38,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:38,716 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-11-29 22:51:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 22:51:38,717 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2020-11-29 22:51:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:38,717 INFO L225 Difference]: With dead ends: 31 [2020-11-29 22:51:38,717 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 22:51:38,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-29 22:51:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 22:51:38,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-29 22:51:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 22:51:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-11-29 22:51:38,724 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-11-29 22:51:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:38,724 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-11-29 22:51:38,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 22:51:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-11-29 22:51:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 22:51:38,725 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:38,734 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:38,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 22:51:38,944 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:38,944 INFO L82 PathProgramCache]: Analyzing trace with hash -749079066, now seen corresponding path program 17 times [2020-11-29 22:51:38,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:38,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355312200] [2020-11-29 22:51:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:39,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355312200] [2020-11-29 22:51:39,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112944447] [2020-11-29 22:51:39,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:39,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-29 22:51:39,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:39,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 22:51:39,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:39,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:39,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-29 22:51:39,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095972203] [2020-11-29 22:51:39,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 22:51:39,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:39,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 22:51:39,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:51:39,341 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 20 states. [2020-11-29 22:51:39,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:39,399 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-11-29 22:51:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 22:51:39,400 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2020-11-29 22:51:39,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:39,400 INFO L225 Difference]: With dead ends: 32 [2020-11-29 22:51:39,400 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 22:51:39,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:51:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 22:51:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 22:51:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 22:51:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-29 22:51:39,404 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-11-29 22:51:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:39,404 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-29 22:51:39,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 22:51:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-29 22:51:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 22:51:39,405 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:39,405 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:39,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:39,622 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1694991570, now seen corresponding path program 18 times [2020-11-29 22:51:39,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:39,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364482068] [2020-11-29 22:51:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:39,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364482068] [2020-11-29 22:51:39,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290831250] [2020-11-29 22:51:39,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:40,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-29 22:51:40,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:40,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 22:51:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:40,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:40,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-11-29 22:51:40,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581904313] [2020-11-29 22:51:40,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 22:51:40,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:40,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 22:51:40,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-29 22:51:40,038 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 21 states. [2020-11-29 22:51:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:40,095 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-11-29 22:51:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 22:51:40,097 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-11-29 22:51:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:40,098 INFO L225 Difference]: With dead ends: 33 [2020-11-29 22:51:40,098 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 22:51:40,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-29 22:51:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 22:51:40,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 22:51:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 22:51:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-11-29 22:51:40,102 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-11-29 22:51:40,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:40,102 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-11-29 22:51:40,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 22:51:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-11-29 22:51:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 22:51:40,103 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:40,103 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:40,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:40,303 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash -953508122, now seen corresponding path program 19 times [2020-11-29 22:51:40,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:40,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984874613] [2020-11-29 22:51:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:40,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984874613] [2020-11-29 22:51:40,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386748879] [2020-11-29 22:51:40,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:40,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 22:51:40,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:40,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:40,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-29 22:51:40,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045259267] [2020-11-29 22:51:40,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 22:51:40,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:40,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 22:51:40,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-29 22:51:40,706 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 22 states. [2020-11-29 22:51:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:40,783 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-11-29 22:51:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 22:51:40,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-11-29 22:51:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:40,784 INFO L225 Difference]: With dead ends: 34 [2020-11-29 22:51:40,784 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 22:51:40,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-29 22:51:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 22:51:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 22:51:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 22:51:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-11-29 22:51:40,788 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-11-29 22:51:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:40,788 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-11-29 22:51:40,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 22:51:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-11-29 22:51:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 22:51:40,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:40,789 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:41,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:41,002 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:41,003 INFO L82 PathProgramCache]: Analyzing trace with hash 557642286, now seen corresponding path program 20 times [2020-11-29 22:51:41,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:41,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979871159] [2020-11-29 22:51:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:41,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979871159] [2020-11-29 22:51:41,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80137628] [2020-11-29 22:51:41,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:41,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:51:41,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:41,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 22:51:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:41,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:41,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-29 22:51:41,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157229638] [2020-11-29 22:51:41,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 22:51:41,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:41,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 22:51:41,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-29 22:51:41,458 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 23 states. [2020-11-29 22:51:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:41,503 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-11-29 22:51:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 22:51:41,506 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2020-11-29 22:51:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:41,506 INFO L225 Difference]: With dead ends: 35 [2020-11-29 22:51:41,506 INFO L226 Difference]: Without dead ends: 30 [2020-11-29 22:51:41,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-29 22:51:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-29 22:51:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-29 22:51:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 22:51:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-11-29 22:51:41,516 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-11-29 22:51:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:41,517 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-11-29 22:51:41,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 22:51:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-11-29 22:51:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 22:51:41,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:41,518 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:41,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 22:51:41,726 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:41,727 INFO L82 PathProgramCache]: Analyzing trace with hash 158664678, now seen corresponding path program 21 times [2020-11-29 22:51:41,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:41,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784714979] [2020-11-29 22:51:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:42,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784714979] [2020-11-29 22:51:42,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546240852] [2020-11-29 22:51:42,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:42,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-29 22:51:42,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:42,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 22:51:42,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:42,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:42,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-11-29 22:51:42,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51439454] [2020-11-29 22:51:42,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 22:51:42,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:42,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 22:51:42,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-11-29 22:51:42,157 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 24 states. [2020-11-29 22:51:42,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:42,220 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-11-29 22:51:42,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 22:51:42,221 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2020-11-29 22:51:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:42,222 INFO L225 Difference]: With dead ends: 36 [2020-11-29 22:51:42,222 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 22:51:42,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-11-29 22:51:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 22:51:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-29 22:51:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 22:51:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-11-29 22:51:42,226 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-11-29 22:51:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:42,226 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-11-29 22:51:42,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 22:51:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-11-29 22:51:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 22:51:42,227 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:42,227 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:42,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-29 22:51:42,446 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:42,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:42,447 INFO L82 PathProgramCache]: Analyzing trace with hash 675260718, now seen corresponding path program 22 times [2020-11-29 22:51:42,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:42,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614407090] [2020-11-29 22:51:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:42,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614407090] [2020-11-29 22:51:42,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429782290] [2020-11-29 22:51:42,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:42,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:51:42,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:42,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 22:51:42,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:42,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:42,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-29 22:51:42,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981064575] [2020-11-29 22:51:42,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 22:51:42,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:42,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 22:51:42,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-11-29 22:51:42,902 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 25 states. [2020-11-29 22:51:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:42,959 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-11-29 22:51:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-29 22:51:42,959 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 30 [2020-11-29 22:51:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:42,960 INFO L225 Difference]: With dead ends: 37 [2020-11-29 22:51:42,960 INFO L226 Difference]: Without dead ends: 32 [2020-11-29 22:51:42,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-11-29 22:51:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-29 22:51:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-29 22:51:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 22:51:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-11-29 22:51:42,964 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-11-29 22:51:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:42,965 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-11-29 22:51:42,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 22:51:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-11-29 22:51:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 22:51:42,966 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:42,966 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:43,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:43,178 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:43,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:43,179 INFO L82 PathProgramCache]: Analyzing trace with hash -490131226, now seen corresponding path program 23 times [2020-11-29 22:51:43,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:43,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585061237] [2020-11-29 22:51:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:43,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585061237] [2020-11-29 22:51:43,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956701358] [2020-11-29 22:51:43,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:43,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-29 22:51:43,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 22:51:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:43,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:43,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-11-29 22:51:43,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227731527] [2020-11-29 22:51:43,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 22:51:43,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 22:51:43,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-11-29 22:51:43,631 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 26 states. [2020-11-29 22:51:43,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:43,699 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-11-29 22:51:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 22:51:43,699 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2020-11-29 22:51:43,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:43,700 INFO L225 Difference]: With dead ends: 38 [2020-11-29 22:51:43,700 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 22:51:43,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-11-29 22:51:43,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 22:51:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-29 22:51:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 22:51:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-11-29 22:51:43,705 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-11-29 22:51:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:43,705 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-11-29 22:51:43,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 22:51:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-11-29 22:51:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 22:51:43,706 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:43,706 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:43,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-29 22:51:43,918 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:43,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:43,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2037424174, now seen corresponding path program 24 times [2020-11-29 22:51:43,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:43,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391299486] [2020-11-29 22:51:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:44,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391299486] [2020-11-29 22:51:44,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285551638] [2020-11-29 22:51:44,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:44,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-29 22:51:44,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:44,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-29 22:51:44,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:44,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:44,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-29 22:51:44,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873782665] [2020-11-29 22:51:44,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-29 22:51:44,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:44,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-29 22:51:44,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-11-29 22:51:44,413 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 27 states. [2020-11-29 22:51:44,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:44,479 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-11-29 22:51:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-29 22:51:44,480 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2020-11-29 22:51:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:44,480 INFO L225 Difference]: With dead ends: 39 [2020-11-29 22:51:44,480 INFO L226 Difference]: Without dead ends: 34 [2020-11-29 22:51:44,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-11-29 22:51:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-29 22:51:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-29 22:51:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-29 22:51:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-11-29 22:51:44,488 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-11-29 22:51:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:44,489 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-11-29 22:51:44,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-29 22:51:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-11-29 22:51:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 22:51:44,490 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:44,490 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:44,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:44,703 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1212737050, now seen corresponding path program 25 times [2020-11-29 22:51:44,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:44,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604940067] [2020-11-29 22:51:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:45,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604940067] [2020-11-29 22:51:45,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661166775] [2020-11-29 22:51:45,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:45,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 22:51:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:45,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:45,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-29 22:51:45,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198921093] [2020-11-29 22:51:45,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 22:51:45,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:45,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 22:51:45,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-11-29 22:51:45,242 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 28 states. [2020-11-29 22:51:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:45,281 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-11-29 22:51:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 22:51:45,282 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2020-11-29 22:51:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:45,282 INFO L225 Difference]: With dead ends: 40 [2020-11-29 22:51:45,282 INFO L226 Difference]: Without dead ends: 35 [2020-11-29 22:51:45,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-11-29 22:51:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-29 22:51:45,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-29 22:51:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-29 22:51:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-11-29 22:51:45,285 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-11-29 22:51:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:45,285 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-11-29 22:51:45,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 22:51:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-11-29 22:51:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 22:51:45,285 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:45,286 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:45,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-29 22:51:45,486 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:45,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:45,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1111480110, now seen corresponding path program 26 times [2020-11-29 22:51:45,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:45,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774870805] [2020-11-29 22:51:45,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:46,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774870805] [2020-11-29 22:51:46,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99625810] [2020-11-29 22:51:46,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/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 [2020-11-29 22:51:46,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:51:46,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:46,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 22:51:46,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:46,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:46,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-11-29 22:51:46,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235857074] [2020-11-29 22:51:46,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-29 22:51:46,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:46,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-29 22:51:46,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-11-29 22:51:46,108 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 29 states. [2020-11-29 22:51:46,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:46,147 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-11-29 22:51:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-29 22:51:46,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 34 [2020-11-29 22:51:46,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:46,150 INFO L225 Difference]: With dead ends: 41 [2020-11-29 22:51:46,150 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 22:51:46,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-11-29 22:51:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 22:51:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-29 22:51:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 22:51:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-11-29 22:51:46,154 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-11-29 22:51:46,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:46,154 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-11-29 22:51:46,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-29 22:51:46,155 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-11-29 22:51:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 22:51:46,155 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:46,155 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:46,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-29 22:51:46,366 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:46,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:46,367 INFO L82 PathProgramCache]: Analyzing trace with hash 147768038, now seen corresponding path program 27 times [2020-11-29 22:51:46,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:46,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686655346] [2020-11-29 22:51:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:46,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686655346] [2020-11-29 22:51:46,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411841257] [2020-11-29 22:51:46,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:46,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-11-29 22:51:46,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:46,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-29 22:51:46,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:46,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:46,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-11-29 22:51:46,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837615173] [2020-11-29 22:51:46,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-29 22:51:46,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-29 22:51:47,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-11-29 22:51:47,000 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 30 states. [2020-11-29 22:51:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:47,053 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-11-29 22:51:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-29 22:51:47,053 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2020-11-29 22:51:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:47,054 INFO L225 Difference]: With dead ends: 42 [2020-11-29 22:51:47,054 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 22:51:47,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-11-29 22:51:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 22:51:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-29 22:51:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-29 22:51:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-11-29 22:51:47,057 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-11-29 22:51:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:47,057 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-11-29 22:51:47,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-29 22:51:47,057 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-11-29 22:51:47,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 22:51:47,057 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:47,058 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:47,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-29 22:51:47,258 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:47,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:47,258 INFO L82 PathProgramCache]: Analyzing trace with hash 337464878, now seen corresponding path program 28 times [2020-11-29 22:51:47,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:47,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070791567] [2020-11-29 22:51:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:47,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070791567] [2020-11-29 22:51:47,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512203372] [2020-11-29 22:51:47,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:47,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:51:47,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:47,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 22:51:47,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:47,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:47,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-11-29 22:51:47,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664857779] [2020-11-29 22:51:47,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-29 22:51:47,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:47,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-29 22:51:47,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-11-29 22:51:47,939 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 31 states. [2020-11-29 22:51:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:48,038 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-11-29 22:51:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-29 22:51:48,038 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 36 [2020-11-29 22:51:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:48,039 INFO L225 Difference]: With dead ends: 43 [2020-11-29 22:51:48,039 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 22:51:48,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-11-29 22:51:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 22:51:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-29 22:51:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-29 22:51:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-11-29 22:51:48,042 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-11-29 22:51:48,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:48,043 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-11-29 22:51:48,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-29 22:51:48,043 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-11-29 22:51:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 22:51:48,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:48,044 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:48,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:48,244 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:48,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:48,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1923099622, now seen corresponding path program 29 times [2020-11-29 22:51:48,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:48,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788348439] [2020-11-29 22:51:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:48,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788348439] [2020-11-29 22:51:48,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932081228] [2020-11-29 22:51:48,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:48,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-11-29 22:51:48,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:48,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 22:51:48,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:48,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:48,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-11-29 22:51:48,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269448213] [2020-11-29 22:51:48,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-29 22:51:48,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-29 22:51:48,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-11-29 22:51:48,803 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 32 states. [2020-11-29 22:51:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:48,889 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-11-29 22:51:48,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 22:51:48,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2020-11-29 22:51:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:48,890 INFO L225 Difference]: With dead ends: 44 [2020-11-29 22:51:48,890 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 22:51:48,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-11-29 22:51:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 22:51:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-29 22:51:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 22:51:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-11-29 22:51:48,894 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-11-29 22:51:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:48,894 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-11-29 22:51:48,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-29 22:51:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-11-29 22:51:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 22:51:48,894 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:48,894 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:49,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-29 22:51:49,095 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash -461830866, now seen corresponding path program 30 times [2020-11-29 22:51:49,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:49,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994570188] [2020-11-29 22:51:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:49,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994570188] [2020-11-29 22:51:49,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513099739] [2020-11-29 22:51:49,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:49,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-11-29 22:51:49,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:49,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 22:51:49,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:49,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:49,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-11-29 22:51:49,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035576144] [2020-11-29 22:51:49,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-29 22:51:49,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:49,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-29 22:51:49,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 22:51:49,701 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 33 states. [2020-11-29 22:51:49,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:49,765 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-11-29 22:51:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-29 22:51:49,765 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 38 [2020-11-29 22:51:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:49,766 INFO L225 Difference]: With dead ends: 45 [2020-11-29 22:51:49,766 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 22:51:49,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 22:51:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 22:51:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-29 22:51:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 22:51:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-11-29 22:51:49,770 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-11-29 22:51:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:49,770 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-11-29 22:51:49,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-29 22:51:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-11-29 22:51:49,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 22:51:49,771 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:49,771 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:49,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:49,990 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:49,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:49,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1380231962, now seen corresponding path program 31 times [2020-11-29 22:51:49,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:49,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986031200] [2020-11-29 22:51:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:50,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986031200] [2020-11-29 22:51:50,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641465680] [2020-11-29 22:51:50,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:50,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-29 22:51:50,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:50,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:50,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-11-29 22:51:50,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105421356] [2020-11-29 22:51:50,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-29 22:51:50,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:50,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-29 22:51:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 22:51:50,819 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 34 states. [2020-11-29 22:51:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:50,911 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-11-29 22:51:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-29 22:51:50,912 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2020-11-29 22:51:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:50,912 INFO L225 Difference]: With dead ends: 46 [2020-11-29 22:51:50,912 INFO L226 Difference]: Without dead ends: 41 [2020-11-29 22:51:50,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 22:51:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-29 22:51:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-29 22:51:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 22:51:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-11-29 22:51:50,916 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-11-29 22:51:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:50,916 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-11-29 22:51:50,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-29 22:51:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-11-29 22:51:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 22:51:50,917 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:50,917 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:51,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-29 22:51:51,117 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:51,118 INFO L82 PathProgramCache]: Analyzing trace with hash 214105134, now seen corresponding path program 32 times [2020-11-29 22:51:51,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:51,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287604426] [2020-11-29 22:51:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:51,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287604426] [2020-11-29 22:51:51,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217293403] [2020-11-29 22:51:51,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:51,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:51:51,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:51,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-29 22:51:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:51,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:51,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2020-11-29 22:51:51,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732320776] [2020-11-29 22:51:51,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-29 22:51:51,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:51,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-29 22:51:51,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 22:51:51,799 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 35 states. [2020-11-29 22:51:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:51,893 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-11-29 22:51:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-29 22:51:51,893 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 40 [2020-11-29 22:51:51,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:51,894 INFO L225 Difference]: With dead ends: 47 [2020-11-29 22:51:51,894 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 22:51:51,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 22:51:51,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 22:51:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-29 22:51:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 22:51:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-11-29 22:51:51,896 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-11-29 22:51:51,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:51,896 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-11-29 22:51:51,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-29 22:51:51,896 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-11-29 22:51:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 22:51:51,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:51,897 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:52,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-29 22:51:52,097 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:52,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:52,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1901052442, now seen corresponding path program 33 times [2020-11-29 22:51:52,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:52,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039253299] [2020-11-29 22:51:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:52,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039253299] [2020-11-29 22:51:52,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859247710] [2020-11-29 22:51:52,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:52,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-11-29 22:51:52,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:52,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 22:51:52,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:52,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:52,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-11-29 22:51:52,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032805905] [2020-11-29 22:51:52,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-29 22:51:52,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:52,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-29 22:51:52,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 22:51:52,998 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 36 states. [2020-11-29 22:51:53,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:53,107 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-11-29 22:51:53,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 22:51:53,108 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-11-29 22:51:53,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:53,108 INFO L225 Difference]: With dead ends: 48 [2020-11-29 22:51:53,108 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 22:51:53,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 22:51:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 22:51:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-11-29 22:51:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 22:51:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-11-29 22:51:53,111 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-11-29 22:51:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:53,112 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-11-29 22:51:53,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-29 22:51:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-11-29 22:51:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 22:51:53,112 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:53,112 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:53,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-29 22:51:53,313 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:53,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:53,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1248539438, now seen corresponding path program 34 times [2020-11-29 22:51:53,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:53,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050237019] [2020-11-29 22:51:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:54,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050237019] [2020-11-29 22:51:54,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950562809] [2020-11-29 22:51:54,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:54,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:51:54,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:54,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 22:51:54,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:54,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:54,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2020-11-29 22:51:54,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684901579] [2020-11-29 22:51:54,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-29 22:51:54,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:54,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-29 22:51:54,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 22:51:54,126 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 37 states. [2020-11-29 22:51:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:54,212 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-11-29 22:51:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-29 22:51:54,212 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2020-11-29 22:51:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:54,213 INFO L225 Difference]: With dead ends: 49 [2020-11-29 22:51:54,213 INFO L226 Difference]: Without dead ends: 44 [2020-11-29 22:51:54,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 22:51:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-29 22:51:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-29 22:51:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 22:51:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-11-29 22:51:54,216 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-11-29 22:51:54,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:54,216 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-11-29 22:51:54,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-29 22:51:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-11-29 22:51:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-29 22:51:54,217 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:54,217 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:54,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-29 22:51:54,438 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:54,439 INFO L82 PathProgramCache]: Analyzing trace with hash 101639910, now seen corresponding path program 35 times [2020-11-29 22:51:54,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:54,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083927047] [2020-11-29 22:51:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:55,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083927047] [2020-11-29 22:51:55,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189841925] [2020-11-29 22:51:55,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:55,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-11-29 22:51:55,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:55,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 22:51:55,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:55,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:55,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-11-29 22:51:55,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901972892] [2020-11-29 22:51:55,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-29 22:51:55,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:55,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-29 22:51:55,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 22:51:55,320 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 38 states. [2020-11-29 22:51:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:55,401 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-11-29 22:51:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-29 22:51:55,402 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2020-11-29 22:51:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:55,403 INFO L225 Difference]: With dead ends: 50 [2020-11-29 22:51:55,403 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 22:51:55,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 22:51:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 22:51:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-29 22:51:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 22:51:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-11-29 22:51:55,405 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-11-29 22:51:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:55,406 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-11-29 22:51:55,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-29 22:51:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-11-29 22:51:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-29 22:51:55,406 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:55,406 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:55,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-29 22:51:55,614 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:55,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:55,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1092507090, now seen corresponding path program 36 times [2020-11-29 22:51:55,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:55,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42579554] [2020-11-29 22:51:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:56,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42579554] [2020-11-29 22:51:56,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115953523] [2020-11-29 22:51:56,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:56,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-29 22:51:56,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:56,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-29 22:51:56,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:56,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:56,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2020-11-29 22:51:56,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289425853] [2020-11-29 22:51:56,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-29 22:51:56,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:56,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-29 22:51:56,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 22:51:56,410 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 39 states. [2020-11-29 22:51:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:56,505 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-11-29 22:51:56,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-29 22:51:56,506 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 44 [2020-11-29 22:51:56,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:56,507 INFO L225 Difference]: With dead ends: 51 [2020-11-29 22:51:56,507 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 22:51:56,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 22:51:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 22:51:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-11-29 22:51:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-29 22:51:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-11-29 22:51:56,509 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-11-29 22:51:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:56,510 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-11-29 22:51:56,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-29 22:51:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-11-29 22:51:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 22:51:56,510 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:56,510 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:56,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-29 22:51:56,722 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:56,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:56,723 INFO L82 PathProgramCache]: Analyzing trace with hash 543641574, now seen corresponding path program 37 times [2020-11-29 22:51:56,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:56,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907961055] [2020-11-29 22:51:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:57,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907961055] [2020-11-29 22:51:57,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010649864] [2020-11-29 22:51:57,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-29 22:51:57,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:57,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:57,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-11-29 22:51:57,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025059722] [2020-11-29 22:51:57,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-29 22:51:57,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:57,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-29 22:51:57,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 22:51:57,869 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 40 states. [2020-11-29 22:51:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:57,916 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-11-29 22:51:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-29 22:51:57,916 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 45 [2020-11-29 22:51:57,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:57,917 INFO L225 Difference]: With dead ends: 52 [2020-11-29 22:51:57,917 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 22:51:57,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 22:51:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 22:51:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-29 22:51:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 22:51:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-11-29 22:51:57,919 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-11-29 22:51:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:57,920 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-11-29 22:51:57,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-29 22:51:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-11-29 22:51:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 22:51:57,920 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:57,920 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:58,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-29 22:51:58,126 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:58,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:58,127 INFO L82 PathProgramCache]: Analyzing trace with hash -275357394, now seen corresponding path program 38 times [2020-11-29 22:51:58,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:58,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021160687] [2020-11-29 22:51:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:59,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021160687] [2020-11-29 22:51:59,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590384918] [2020-11-29 22:51:59,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:59,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:51:59,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:59,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-29 22:51:59,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:51:59,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:59,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2020-11-29 22:51:59,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715317789] [2020-11-29 22:51:59,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-29 22:51:59,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:59,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-29 22:51:59,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 22:51:59,251 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 41 states. [2020-11-29 22:51:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:59,384 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-11-29 22:51:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-29 22:51:59,396 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 46 [2020-11-29 22:51:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:59,397 INFO L225 Difference]: With dead ends: 53 [2020-11-29 22:51:59,397 INFO L226 Difference]: Without dead ends: 48 [2020-11-29 22:51:59,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 22:51:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-29 22:51:59,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-11-29 22:51:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 22:51:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-11-29 22:51:59,401 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-11-29 22:51:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:59,401 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-11-29 22:51:59,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-29 22:51:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-11-29 22:51:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 22:51:59,402 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:59,402 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:59,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-29 22:51:59,616 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:51:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:59,616 INFO L82 PathProgramCache]: Analyzing trace with hash 105478374, now seen corresponding path program 39 times [2020-11-29 22:51:59,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:59,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448008662] [2020-11-29 22:51:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:00,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448008662] [2020-11-29 22:52:00,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757123222] [2020-11-29 22:52:00,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:00,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-11-29 22:52:00,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:00,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-29 22:52:00,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:00,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:00,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2020-11-29 22:52:00,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549234460] [2020-11-29 22:52:00,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-29 22:52:00,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-29 22:52:00,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 22:52:00,539 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 42 states. [2020-11-29 22:52:00,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:00,591 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-11-29 22:52:00,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-29 22:52:00,591 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 47 [2020-11-29 22:52:00,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:00,591 INFO L225 Difference]: With dead ends: 54 [2020-11-29 22:52:00,592 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 22:52:00,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 22:52:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 22:52:00,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-11-29 22:52:00,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-29 22:52:00,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-11-29 22:52:00,594 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-11-29 22:52:00,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:00,594 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-11-29 22:52:00,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-29 22:52:00,594 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-11-29 22:52:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-29 22:52:00,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:00,595 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:00,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:00,796 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:00,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:00,796 INFO L82 PathProgramCache]: Analyzing trace with hash -973514706, now seen corresponding path program 40 times [2020-11-29 22:52:00,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:00,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910755672] [2020-11-29 22:52:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:01,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910755672] [2020-11-29 22:52:01,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102080826] [2020-11-29 22:52:01,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:01,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:52:01,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:01,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-29 22:52:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:01,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:01,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2020-11-29 22:52:01,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014123142] [2020-11-29 22:52:01,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-29 22:52:01,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:01,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-29 22:52:01,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 22:52:01,876 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 43 states. [2020-11-29 22:52:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:02,024 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-11-29 22:52:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-29 22:52:02,025 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 48 [2020-11-29 22:52:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:02,026 INFO L225 Difference]: With dead ends: 55 [2020-11-29 22:52:02,026 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 22:52:02,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 22:52:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 22:52:02,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-29 22:52:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-29 22:52:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-11-29 22:52:02,029 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-11-29 22:52:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:02,029 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-11-29 22:52:02,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-29 22:52:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-11-29 22:52:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 22:52:02,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:02,030 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:02,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:02,242 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:02,243 INFO L82 PathProgramCache]: Analyzing trace with hash -62561818, now seen corresponding path program 41 times [2020-11-29 22:52:02,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:02,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943790171] [2020-11-29 22:52:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:03,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943790171] [2020-11-29 22:52:03,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000028985] [2020-11-29 22:52:03,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:03,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-11-29 22:52:03,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:03,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-29 22:52:03,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:03,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:03,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2020-11-29 22:52:03,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632219635] [2020-11-29 22:52:03,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-29 22:52:03,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:03,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-29 22:52:03,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 22:52:03,220 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 44 states. [2020-11-29 22:52:03,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:03,316 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-11-29 22:52:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-29 22:52:03,316 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 49 [2020-11-29 22:52:03,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:03,317 INFO L225 Difference]: With dead ends: 56 [2020-11-29 22:52:03,317 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 22:52:03,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 22:52:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 22:52:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-29 22:52:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 22:52:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-11-29 22:52:03,321 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-11-29 22:52:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:03,321 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-11-29 22:52:03,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-29 22:52:03,321 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-11-29 22:52:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-29 22:52:03,321 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:03,321 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:03,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-29 22:52:03,534 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1887793362, now seen corresponding path program 42 times [2020-11-29 22:52:03,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:03,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148618319] [2020-11-29 22:52:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:04,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148618319] [2020-11-29 22:52:04,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180427371] [2020-11-29 22:52:04,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:04,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-11-29 22:52:04,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:04,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-29 22:52:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:04,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:04,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2020-11-29 22:52:04,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109338731] [2020-11-29 22:52:04,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-29 22:52:04,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-29 22:52:04,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 22:52:04,621 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 45 states. [2020-11-29 22:52:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:04,723 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-11-29 22:52:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-29 22:52:04,723 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 50 [2020-11-29 22:52:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:04,724 INFO L225 Difference]: With dead ends: 57 [2020-11-29 22:52:04,724 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 22:52:04,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 22:52:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 22:52:04,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-11-29 22:52:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 22:52:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-11-29 22:52:04,728 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-11-29 22:52:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:04,728 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-11-29 22:52:04,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-29 22:52:04,728 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-11-29 22:52:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-29 22:52:04,728 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:04,729 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:04,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:04,929 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:04,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1659570918, now seen corresponding path program 43 times [2020-11-29 22:52:04,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:04,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859879161] [2020-11-29 22:52:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:05,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859879161] [2020-11-29 22:52:05,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830203940] [2020-11-29 22:52:05,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-29 22:52:05,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:05,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:05,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2020-11-29 22:52:05,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999479456] [2020-11-29 22:52:05,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-29 22:52:05,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:05,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-29 22:52:05,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-11-29 22:52:05,970 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 46 states. [2020-11-29 22:52:06,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:06,075 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-11-29 22:52:06,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-29 22:52:06,075 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 51 [2020-11-29 22:52:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:06,076 INFO L225 Difference]: With dead ends: 58 [2020-11-29 22:52:06,076 INFO L226 Difference]: Without dead ends: 53 [2020-11-29 22:52:06,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-11-29 22:52:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-29 22:52:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-29 22:52:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 22:52:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-11-29 22:52:06,077 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-11-29 22:52:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:06,078 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-11-29 22:52:06,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-29 22:52:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-11-29 22:52:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 22:52:06,078 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:06,078 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:06,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:06,279 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:06,279 INFO L82 PathProgramCache]: Analyzing trace with hash -41286098, now seen corresponding path program 44 times [2020-11-29 22:52:06,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:06,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683104190] [2020-11-29 22:52:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:07,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683104190] [2020-11-29 22:52:07,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996405733] [2020-11-29 22:52:07,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:07,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:52:07,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:07,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 46 conjunts are in the unsatisfiable core [2020-11-29 22:52:07,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:07,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:07,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2020-11-29 22:52:07,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859146534] [2020-11-29 22:52:07,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-29 22:52:07,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:07,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-29 22:52:07,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 22:52:07,615 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 47 states. [2020-11-29 22:52:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:07,735 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-11-29 22:52:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-29 22:52:07,736 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 52 [2020-11-29 22:52:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:07,736 INFO L225 Difference]: With dead ends: 59 [2020-11-29 22:52:07,737 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 22:52:07,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 22:52:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 22:52:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-29 22:52:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 22:52:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-11-29 22:52:07,739 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-11-29 22:52:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:07,740 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-11-29 22:52:07,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-29 22:52:07,740 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-11-29 22:52:07,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-29 22:52:07,740 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:07,740 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:07,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-29 22:52:07,941 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:07,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:07,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1228246042, now seen corresponding path program 45 times [2020-11-29 22:52:07,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:07,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973687325] [2020-11-29 22:52:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:09,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973687325] [2020-11-29 22:52:09,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375095471] [2020-11-29 22:52:09,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:09,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-11-29 22:52:09,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:09,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-29 22:52:09,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:09,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:09,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2020-11-29 22:52:09,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531825157] [2020-11-29 22:52:09,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-29 22:52:09,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:09,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-29 22:52:09,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-11-29 22:52:09,166 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 48 states. [2020-11-29 22:52:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:09,247 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-11-29 22:52:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-29 22:52:09,247 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 53 [2020-11-29 22:52:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:09,248 INFO L225 Difference]: With dead ends: 60 [2020-11-29 22:52:09,248 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 22:52:09,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-11-29 22:52:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 22:52:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-29 22:52:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 22:52:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-11-29 22:52:09,251 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-11-29 22:52:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:09,251 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-11-29 22:52:09,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-29 22:52:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-11-29 22:52:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-29 22:52:09,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:09,252 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:09,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-29 22:52:09,461 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash 630701358, now seen corresponding path program 46 times [2020-11-29 22:52:09,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:09,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273351595] [2020-11-29 22:52:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:10,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273351595] [2020-11-29 22:52:10,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753567852] [2020-11-29 22:52:10,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:10,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:52:10,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:10,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-29 22:52:10,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:10,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:10,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2020-11-29 22:52:10,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092106852] [2020-11-29 22:52:10,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-29 22:52:10,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:10,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-29 22:52:10,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 22:52:10,651 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 49 states. [2020-11-29 22:52:10,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:10,741 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-11-29 22:52:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-29 22:52:10,742 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 54 [2020-11-29 22:52:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:10,742 INFO L225 Difference]: With dead ends: 61 [2020-11-29 22:52:10,742 INFO L226 Difference]: Without dead ends: 56 [2020-11-29 22:52:10,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 22:52:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-29 22:52:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-29 22:52:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-29 22:52:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-11-29 22:52:10,745 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-11-29 22:52:10,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:10,746 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-11-29 22:52:10,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-29 22:52:10,746 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-11-29 22:52:10,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-29 22:52:10,746 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:10,747 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:10,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-29 22:52:10,967 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:10,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1871471386, now seen corresponding path program 47 times [2020-11-29 22:52:10,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:10,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868681994] [2020-11-29 22:52:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:12,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868681994] [2020-11-29 22:52:12,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001428480] [2020-11-29 22:52:12,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:12,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-11-29 22:52:12,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:12,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 49 conjunts are in the unsatisfiable core [2020-11-29 22:52:12,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:12,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:12,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2020-11-29 22:52:12,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645348948] [2020-11-29 22:52:12,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-29 22:52:12,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:12,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-29 22:52:12,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-11-29 22:52:12,410 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 50 states. [2020-11-29 22:52:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:12,497 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-11-29 22:52:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-29 22:52:12,498 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 55 [2020-11-29 22:52:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:12,499 INFO L225 Difference]: With dead ends: 62 [2020-11-29 22:52:12,499 INFO L226 Difference]: Without dead ends: 57 [2020-11-29 22:52:12,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-11-29 22:52:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-29 22:52:12,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-29 22:52:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 22:52:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-11-29 22:52:12,502 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-11-29 22:52:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:12,503 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-11-29 22:52:12,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-29 22:52:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-11-29 22:52:12,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-29 22:52:12,503 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:12,503 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:12,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:12,714 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:12,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2129415122, now seen corresponding path program 48 times [2020-11-29 22:52:12,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:12,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208320578] [2020-11-29 22:52:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:13,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208320578] [2020-11-29 22:52:13,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624406836] [2020-11-29 22:52:13,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:14,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-11-29 22:52:14,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:14,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 50 conjunts are in the unsatisfiable core [2020-11-29 22:52:14,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:14,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:14,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2020-11-29 22:52:14,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470467987] [2020-11-29 22:52:14,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-29 22:52:14,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:14,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-29 22:52:14,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 22:52:14,069 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 51 states. [2020-11-29 22:52:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:14,139 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-11-29 22:52:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-29 22:52:14,140 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 56 [2020-11-29 22:52:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:14,140 INFO L225 Difference]: With dead ends: 63 [2020-11-29 22:52:14,140 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 22:52:14,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 22:52:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 22:52:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-11-29 22:52:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 22:52:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-11-29 22:52:14,143 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-11-29 22:52:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:14,143 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-11-29 22:52:14,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-29 22:52:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-11-29 22:52:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-29 22:52:14,144 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:14,144 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:14,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-29 22:52:14,345 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1535736346, now seen corresponding path program 49 times [2020-11-29 22:52:14,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:14,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57706590] [2020-11-29 22:52:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:15,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57706590] [2020-11-29 22:52:15,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925306918] [2020-11-29 22:52:15,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:15,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 51 conjunts are in the unsatisfiable core [2020-11-29 22:52:15,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:15,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:15,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2020-11-29 22:52:15,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157915017] [2020-11-29 22:52:15,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-29 22:52:15,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-29 22:52:15,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-11-29 22:52:15,729 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 52 states. [2020-11-29 22:52:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:15,852 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-11-29 22:52:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-29 22:52:15,853 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 57 [2020-11-29 22:52:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:15,853 INFO L225 Difference]: With dead ends: 64 [2020-11-29 22:52:15,853 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 22:52:15,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-11-29 22:52:15,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 22:52:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-29 22:52:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 22:52:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-11-29 22:52:15,856 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-11-29 22:52:15,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:15,856 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-11-29 22:52:15,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-29 22:52:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-11-29 22:52:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-29 22:52:15,856 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:15,857 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:16,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:16,057 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:16,058 INFO L82 PathProgramCache]: Analyzing trace with hash -311563474, now seen corresponding path program 50 times [2020-11-29 22:52:16,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:16,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272353500] [2020-11-29 22:52:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:17,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272353500] [2020-11-29 22:52:17,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623820693] [2020-11-29 22:52:17,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:17,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:52:17,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:17,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 52 conjunts are in the unsatisfiable core [2020-11-29 22:52:17,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:17,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:17,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2020-11-29 22:52:17,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367848967] [2020-11-29 22:52:17,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-29 22:52:17,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:17,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-29 22:52:17,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-11-29 22:52:17,752 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 53 states. [2020-11-29 22:52:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:17,852 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-11-29 22:52:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-29 22:52:17,852 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 58 [2020-11-29 22:52:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:17,853 INFO L225 Difference]: With dead ends: 65 [2020-11-29 22:52:17,853 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 22:52:17,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-11-29 22:52:17,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 22:52:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-29 22:52:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 22:52:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-11-29 22:52:17,856 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-11-29 22:52:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:17,857 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-11-29 22:52:17,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-29 22:52:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-11-29 22:52:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-29 22:52:17,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:17,857 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:18,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:18,062 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:18,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1016910106, now seen corresponding path program 51 times [2020-11-29 22:52:18,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:18,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981320884] [2020-11-29 22:52:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:19,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981320884] [2020-11-29 22:52:19,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006436122] [2020-11-29 22:52:19,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:19,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2020-11-29 22:52:19,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 53 conjunts are in the unsatisfiable core [2020-11-29 22:52:19,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:19,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:19,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2020-11-29 22:52:19,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59917001] [2020-11-29 22:52:19,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-29 22:52:19,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:19,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-29 22:52:19,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 22:52:19,769 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 54 states. [2020-11-29 22:52:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:19,901 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-11-29 22:52:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-29 22:52:19,901 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 59 [2020-11-29 22:52:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:19,902 INFO L225 Difference]: With dead ends: 66 [2020-11-29 22:52:19,902 INFO L226 Difference]: Without dead ends: 61 [2020-11-29 22:52:19,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 22:52:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-29 22:52:19,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-11-29 22:52:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-29 22:52:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-11-29 22:52:19,904 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-11-29 22:52:19,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:19,904 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-11-29 22:52:19,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-29 22:52:19,904 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-11-29 22:52:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-29 22:52:19,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:19,905 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:20,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-11-29 22:52:20,105 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:20,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1407819218, now seen corresponding path program 52 times [2020-11-29 22:52:20,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:20,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974205437] [2020-11-29 22:52:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:21,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974205437] [2020-11-29 22:52:21,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722656835] [2020-11-29 22:52:21,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:21,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:52:21,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:21,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 54 conjunts are in the unsatisfiable core [2020-11-29 22:52:21,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:21,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:21,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2020-11-29 22:52:21,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086295103] [2020-11-29 22:52:21,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-29 22:52:21,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:21,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-29 22:52:21,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-11-29 22:52:21,596 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 55 states. [2020-11-29 22:52:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:21,662 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-11-29 22:52:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-29 22:52:21,662 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 60 [2020-11-29 22:52:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:21,663 INFO L225 Difference]: With dead ends: 67 [2020-11-29 22:52:21,663 INFO L226 Difference]: Without dead ends: 62 [2020-11-29 22:52:21,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-11-29 22:52:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-29 22:52:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-29 22:52:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 22:52:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-11-29 22:52:21,667 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-11-29 22:52:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:21,667 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-11-29 22:52:21,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-29 22:52:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-11-29 22:52:21,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-29 22:52:21,668 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:21,668 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:21,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:21,878 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:21,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:21,879 INFO L82 PathProgramCache]: Analyzing trace with hash -641099802, now seen corresponding path program 53 times [2020-11-29 22:52:21,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:21,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204891189] [2020-11-29 22:52:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:23,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204891189] [2020-11-29 22:52:23,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585088379] [2020-11-29 22:52:23,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:23,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2020-11-29 22:52:23,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:23,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 55 conjunts are in the unsatisfiable core [2020-11-29 22:52:23,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:23,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:23,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2020-11-29 22:52:23,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320513040] [2020-11-29 22:52:23,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-29 22:52:23,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:23,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-29 22:52:23,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-11-29 22:52:23,493 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 56 states. [2020-11-29 22:52:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:23,588 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-11-29 22:52:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-29 22:52:23,589 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 61 [2020-11-29 22:52:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:23,589 INFO L225 Difference]: With dead ends: 68 [2020-11-29 22:52:23,589 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 22:52:23,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-11-29 22:52:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 22:52:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-29 22:52:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 22:52:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-11-29 22:52:23,593 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-11-29 22:52:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:23,593 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-11-29 22:52:23,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-29 22:52:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-11-29 22:52:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-29 22:52:23,594 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:23,594 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:23,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-29 22:52:23,798 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:23,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1652365614, now seen corresponding path program 54 times [2020-11-29 22:52:23,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:23,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969832454] [2020-11-29 22:52:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:25,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969832454] [2020-11-29 22:52:25,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789463908] [2020-11-29 22:52:25,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:25,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2020-11-29 22:52:25,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:25,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 56 conjunts are in the unsatisfiable core [2020-11-29 22:52:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:25,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:25,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2020-11-29 22:52:25,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939627912] [2020-11-29 22:52:25,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-29 22:52:25,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:25,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-29 22:52:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 22:52:25,458 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 57 states. [2020-11-29 22:52:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:25,662 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-11-29 22:52:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-29 22:52:25,663 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 62 [2020-11-29 22:52:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:25,664 INFO L225 Difference]: With dead ends: 69 [2020-11-29 22:52:25,664 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 22:52:25,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 22:52:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 22:52:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-11-29 22:52:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 22:52:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-11-29 22:52:25,667 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2020-11-29 22:52:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:25,667 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-11-29 22:52:25,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-29 22:52:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-11-29 22:52:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-29 22:52:25,668 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:25,668 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:25,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-29 22:52:25,886 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash -264650522, now seen corresponding path program 55 times [2020-11-29 22:52:25,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:25,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507974204] [2020-11-29 22:52:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:27,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507974204] [2020-11-29 22:52:27,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25183405] [2020-11-29 22:52:27,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:27,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 57 conjunts are in the unsatisfiable core [2020-11-29 22:52:27,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:27,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:27,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2020-11-29 22:52:27,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263765171] [2020-11-29 22:52:27,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-29 22:52:27,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-29 22:52:27,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-11-29 22:52:27,836 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 58 states. [2020-11-29 22:52:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:27,922 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-11-29 22:52:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-29 22:52:27,923 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 63 [2020-11-29 22:52:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:27,923 INFO L225 Difference]: With dead ends: 70 [2020-11-29 22:52:27,923 INFO L226 Difference]: Without dead ends: 65 [2020-11-29 22:52:27,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-11-29 22:52:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-29 22:52:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-11-29 22:52:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-29 22:52:27,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-11-29 22:52:27,926 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2020-11-29 22:52:27,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:27,926 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-11-29 22:52:27,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-29 22:52:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-11-29 22:52:27,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-29 22:52:27,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:27,927 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:28,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:28,127 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash 437391406, now seen corresponding path program 56 times [2020-11-29 22:52:28,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:28,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972438855] [2020-11-29 22:52:28,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:29,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972438855] [2020-11-29 22:52:29,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232622076] [2020-11-29 22:52:29,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:29,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:52:29,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:29,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 58 conjunts are in the unsatisfiable core [2020-11-29 22:52:29,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:29,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:29,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2020-11-29 22:52:29,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212802115] [2020-11-29 22:52:29,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-29 22:52:29,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:29,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-29 22:52:29,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-11-29 22:52:29,989 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 59 states. [2020-11-29 22:52:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:30,060 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-11-29 22:52:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-29 22:52:30,061 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 64 [2020-11-29 22:52:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:30,061 INFO L225 Difference]: With dead ends: 71 [2020-11-29 22:52:30,061 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 22:52:30,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-11-29 22:52:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 22:52:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-11-29 22:52:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 22:52:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-11-29 22:52:30,063 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2020-11-29 22:52:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:30,064 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-11-29 22:52:30,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-29 22:52:30,064 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-11-29 22:52:30,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-29 22:52:30,064 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:30,064 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:30,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-29 22:52:30,265 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:30,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:30,265 INFO L82 PathProgramCache]: Analyzing trace with hash 725854694, now seen corresponding path program 57 times [2020-11-29 22:52:30,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:30,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147506593] [2020-11-29 22:52:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:32,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147506593] [2020-11-29 22:52:32,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544369814] [2020-11-29 22:52:32,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:32,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-11-29 22:52:32,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:32,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 59 conjunts are in the unsatisfiable core [2020-11-29 22:52:32,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:32,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:32,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2020-11-29 22:52:32,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511624080] [2020-11-29 22:52:32,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-29 22:52:32,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:32,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-29 22:52:32,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-11-29 22:52:32,241 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 60 states. [2020-11-29 22:52:32,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:32,306 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-11-29 22:52:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-29 22:52:32,306 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 65 [2020-11-29 22:52:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:32,307 INFO L225 Difference]: With dead ends: 72 [2020-11-29 22:52:32,307 INFO L226 Difference]: Without dead ends: 67 [2020-11-29 22:52:32,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-11-29 22:52:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-29 22:52:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-11-29 22:52:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 22:52:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-11-29 22:52:32,309 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2020-11-29 22:52:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:32,309 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-11-29 22:52:32,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-29 22:52:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-11-29 22:52:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-29 22:52:32,310 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:32,310 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:32,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:32,510 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:32,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:32,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1078282030, now seen corresponding path program 58 times [2020-11-29 22:52:32,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:32,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115810139] [2020-11-29 22:52:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:34,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115810139] [2020-11-29 22:52:34,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16749547] [2020-11-29 22:52:34,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:34,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:52:34,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 60 conjunts are in the unsatisfiable core [2020-11-29 22:52:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:34,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:34,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-11-29 22:52:34,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743034962] [2020-11-29 22:52:34,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-29 22:52:34,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:34,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-29 22:52:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 22:52:34,365 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 61 states. [2020-11-29 22:52:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:34,440 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-11-29 22:52:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-29 22:52:34,440 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 66 [2020-11-29 22:52:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:34,440 INFO L225 Difference]: With dead ends: 73 [2020-11-29 22:52:34,441 INFO L226 Difference]: Without dead ends: 68 [2020-11-29 22:52:34,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 22:52:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-29 22:52:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-11-29 22:52:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 22:52:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-11-29 22:52:34,444 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2020-11-29 22:52:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:34,444 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-11-29 22:52:34,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-29 22:52:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-11-29 22:52:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-29 22:52:34,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:34,445 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:34,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-29 22:52:34,667 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:34,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:34,667 INFO L82 PathProgramCache]: Analyzing trace with hash -881372442, now seen corresponding path program 59 times [2020-11-29 22:52:34,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:34,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230481498] [2020-11-29 22:52:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:36,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230481498] [2020-11-29 22:52:36,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502273832] [2020-11-29 22:52:36,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:36,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-11-29 22:52:36,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:36,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 61 conjunts are in the unsatisfiable core [2020-11-29 22:52:36,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:36,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:36,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2020-11-29 22:52:36,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867857247] [2020-11-29 22:52:36,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-29 22:52:36,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:36,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-29 22:52:36,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-11-29 22:52:36,587 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 62 states. [2020-11-29 22:52:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:36,725 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-11-29 22:52:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-29 22:52:36,725 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 67 [2020-11-29 22:52:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:36,726 INFO L225 Difference]: With dead ends: 74 [2020-11-29 22:52:36,726 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 22:52:36,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-11-29 22:52:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 22:52:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-11-29 22:52:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-29 22:52:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-11-29 22:52:36,730 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2020-11-29 22:52:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:36,730 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-11-29 22:52:36,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-29 22:52:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-11-29 22:52:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-29 22:52:36,731 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:36,731 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:36,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:36,954 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:36,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1501118930, now seen corresponding path program 60 times [2020-11-29 22:52:36,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:36,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248813016] [2020-11-29 22:52:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:38,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248813016] [2020-11-29 22:52:38,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611591744] [2020-11-29 22:52:38,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:38,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-11-29 22:52:38,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:38,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 62 conjunts are in the unsatisfiable core [2020-11-29 22:52:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:38,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:38,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2020-11-29 22:52:38,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147095697] [2020-11-29 22:52:38,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-29 22:52:38,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:38,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-29 22:52:38,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-11-29 22:52:38,978 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 63 states. [2020-11-29 22:52:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:39,068 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-11-29 22:52:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-29 22:52:39,069 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 68 [2020-11-29 22:52:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:39,069 INFO L225 Difference]: With dead ends: 75 [2020-11-29 22:52:39,069 INFO L226 Difference]: Without dead ends: 70 [2020-11-29 22:52:39,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-11-29 22:52:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-29 22:52:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-11-29 22:52:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 22:52:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-11-29 22:52:39,072 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2020-11-29 22:52:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:39,072 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-11-29 22:52:39,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-29 22:52:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-11-29 22:52:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-29 22:52:39,073 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:39,073 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:39,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-11-29 22:52:39,275 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:39,275 INFO L82 PathProgramCache]: Analyzing trace with hash 761576422, now seen corresponding path program 61 times [2020-11-29 22:52:39,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:39,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283075935] [2020-11-29 22:52:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:41,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283075935] [2020-11-29 22:52:41,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018218782] [2020-11-29 22:52:41,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 63 conjunts are in the unsatisfiable core [2020-11-29 22:52:41,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:41,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:41,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2020-11-29 22:52:41,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336579862] [2020-11-29 22:52:41,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-29 22:52:41,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:41,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-29 22:52:41,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-11-29 22:52:41,274 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 64 states. [2020-11-29 22:52:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:41,420 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-11-29 22:52:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-29 22:52:41,421 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 69 [2020-11-29 22:52:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:41,422 INFO L225 Difference]: With dead ends: 76 [2020-11-29 22:52:41,422 INFO L226 Difference]: Without dead ends: 71 [2020-11-29 22:52:41,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-11-29 22:52:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-29 22:52:41,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-11-29 22:52:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 22:52:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-11-29 22:52:41,425 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2020-11-29 22:52:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:41,425 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-11-29 22:52:41,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-29 22:52:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-11-29 22:52:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-29 22:52:41,425 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:41,426 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:41,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:41,626 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:41,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2109311698, now seen corresponding path program 62 times [2020-11-29 22:52:41,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:41,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635680013] [2020-11-29 22:52:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:43,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635680013] [2020-11-29 22:52:43,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862168088] [2020-11-29 22:52:43,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:43,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:52:43,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:43,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 64 conjunts are in the unsatisfiable core [2020-11-29 22:52:43,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:43,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:43,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2020-11-29 22:52:43,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81573638] [2020-11-29 22:52:43,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-29 22:52:43,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:43,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-29 22:52:43,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-11-29 22:52:43,813 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 65 states. [2020-11-29 22:52:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:43,989 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-11-29 22:52:43,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-11-29 22:52:43,990 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 70 [2020-11-29 22:52:43,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:43,991 INFO L225 Difference]: With dead ends: 77 [2020-11-29 22:52:43,991 INFO L226 Difference]: Without dead ends: 72 [2020-11-29 22:52:43,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-11-29 22:52:43,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-29 22:52:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-11-29 22:52:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 22:52:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-11-29 22:52:43,995 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2020-11-29 22:52:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:43,995 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-11-29 22:52:43,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-29 22:52:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-11-29 22:52:43,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-29 22:52:43,995 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:43,996 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:44,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-29 22:52:44,208 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:44,208 INFO L82 PathProgramCache]: Analyzing trace with hash -912530202, now seen corresponding path program 63 times [2020-11-29 22:52:44,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:44,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397785717] [2020-11-29 22:52:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:46,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397785717] [2020-11-29 22:52:46,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540206008] [2020-11-29 22:52:46,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:46,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2020-11-29 22:52:46,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 65 conjunts are in the unsatisfiable core [2020-11-29 22:52:46,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:46,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:46,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2020-11-29 22:52:46,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666661969] [2020-11-29 22:52:46,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-29 22:52:46,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:46,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-29 22:52:46,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-11-29 22:52:46,408 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 66 states. [2020-11-29 22:52:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:46,549 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-11-29 22:52:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-29 22:52:46,549 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 71 [2020-11-29 22:52:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:46,550 INFO L225 Difference]: With dead ends: 78 [2020-11-29 22:52:46,550 INFO L226 Difference]: Without dead ends: 73 [2020-11-29 22:52:46,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-11-29 22:52:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-29 22:52:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-11-29 22:52:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-29 22:52:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-11-29 22:52:46,552 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2020-11-29 22:52:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:46,552 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-11-29 22:52:46,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-11-29 22:52:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-11-29 22:52:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-29 22:52:46,553 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:46,553 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:46,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:46,753 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1827957806, now seen corresponding path program 64 times [2020-11-29 22:52:46,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:46,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889525854] [2020-11-29 22:52:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:48,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889525854] [2020-11-29 22:52:48,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354147928] [2020-11-29 22:52:48,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:48,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:52:48,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:48,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 66 conjunts are in the unsatisfiable core [2020-11-29 22:52:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:48,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:48,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2020-11-29 22:52:48,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173818279] [2020-11-29 22:52:48,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-11-29 22:52:48,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:48,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-11-29 22:52:48,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-11-29 22:52:48,989 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 67 states. [2020-11-29 22:52:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:49,145 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-11-29 22:52:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-29 22:52:49,145 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 72 [2020-11-29 22:52:49,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:49,146 INFO L225 Difference]: With dead ends: 79 [2020-11-29 22:52:49,146 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 22:52:49,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-11-29 22:52:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 22:52:49,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-29 22:52:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-29 22:52:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-11-29 22:52:49,149 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2020-11-29 22:52:49,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:49,150 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-11-29 22:52:49,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-11-29 22:52:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-11-29 22:52:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-29 22:52:49,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:49,150 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:49,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-29 22:52:49,358 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:49,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:49,359 INFO L82 PathProgramCache]: Analyzing trace with hash 883740134, now seen corresponding path program 65 times [2020-11-29 22:52:49,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:49,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699414126] [2020-11-29 22:52:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:51,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699414126] [2020-11-29 22:52:51,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573064501] [2020-11-29 22:52:51,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:51,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-11-29 22:52:51,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:51,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 67 conjunts are in the unsatisfiable core [2020-11-29 22:52:51,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:51,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:51,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2020-11-29 22:52:51,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977419090] [2020-11-29 22:52:51,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-29 22:52:51,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-29 22:52:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-11-29 22:52:51,742 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 68 states. [2020-11-29 22:52:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:51,949 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-11-29 22:52:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-29 22:52:51,949 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 73 [2020-11-29 22:52:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:51,950 INFO L225 Difference]: With dead ends: 80 [2020-11-29 22:52:51,950 INFO L226 Difference]: Without dead ends: 75 [2020-11-29 22:52:51,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-11-29 22:52:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-29 22:52:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-11-29 22:52:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 22:52:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-11-29 22:52:51,954 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2020-11-29 22:52:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:51,954 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-11-29 22:52:51,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-29 22:52:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-11-29 22:52:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-29 22:52:51,955 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:51,955 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:52,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-29 22:52:52,155 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:52,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1677763374, now seen corresponding path program 66 times [2020-11-29 22:52:52,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:52,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646955418] [2020-11-29 22:52:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:54,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646955418] [2020-11-29 22:52:54,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683497277] [2020-11-29 22:52:54,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:54,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2020-11-29 22:52:54,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 68 conjunts are in the unsatisfiable core [2020-11-29 22:52:54,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:54,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:54,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2020-11-29 22:52:54,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382667483] [2020-11-29 22:52:54,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-11-29 22:52:54,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:54,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-11-29 22:52:54,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-11-29 22:52:54,540 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 69 states. [2020-11-29 22:52:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:54,658 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-11-29 22:52:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-11-29 22:52:54,658 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 74 [2020-11-29 22:52:54,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:54,659 INFO L225 Difference]: With dead ends: 81 [2020-11-29 22:52:54,659 INFO L226 Difference]: Without dead ends: 76 [2020-11-29 22:52:54,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-11-29 22:52:54,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-29 22:52:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-11-29 22:52:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 22:52:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-11-29 22:52:54,661 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2020-11-29 22:52:54,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:54,662 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-11-29 22:52:54,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-11-29 22:52:54,662 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-11-29 22:52:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-29 22:52:54,662 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:54,662 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:54,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-29 22:52:54,874 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:54,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:54,875 INFO L82 PathProgramCache]: Analyzing trace with hash 522680038, now seen corresponding path program 67 times [2020-11-29 22:52:54,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:54,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998423914] [2020-11-29 22:52:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:57,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998423914] [2020-11-29 22:52:57,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525513973] [2020-11-29 22:52:57,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 69 conjunts are in the unsatisfiable core [2020-11-29 22:52:57,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:57,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:57,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2020-11-29 22:52:57,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569559364] [2020-11-29 22:52:57,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-11-29 22:52:57,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:57,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-11-29 22:52:57,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-11-29 22:52:57,300 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 70 states. [2020-11-29 22:52:57,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:57,448 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-11-29 22:52:57,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-29 22:52:57,448 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 75 [2020-11-29 22:52:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:57,449 INFO L225 Difference]: With dead ends: 82 [2020-11-29 22:52:57,449 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 22:52:57,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-11-29 22:52:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 22:52:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-11-29 22:52:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-29 22:52:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-11-29 22:52:57,452 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2020-11-29 22:52:57,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:57,452 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-11-29 22:52:57,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-11-29 22:52:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-11-29 22:52:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-29 22:52:57,453 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:57,453 INFO L422 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:57,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:57,654 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:52:57,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:57,655 INFO L82 PathProgramCache]: Analyzing trace with hash -925165010, now seen corresponding path program 68 times [2020-11-29 22:52:57,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:57,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242459846] [2020-11-29 22:52:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:52:59,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242459846] [2020-11-29 22:52:59,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922194596] [2020-11-29 22:52:59,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:00,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:53:00,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 70 conjunts are in the unsatisfiable core [2020-11-29 22:53:00,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:00,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:00,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2020-11-29 22:53:00,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169578643] [2020-11-29 22:53:00,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-11-29 22:53:00,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:00,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-11-29 22:53:00,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-11-29 22:53:00,081 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 71 states. [2020-11-29 22:53:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:00,234 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-11-29 22:53:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-29 22:53:00,234 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 76 [2020-11-29 22:53:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:00,235 INFO L225 Difference]: With dead ends: 83 [2020-11-29 22:53:00,235 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 22:53:00,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-11-29 22:53:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 22:53:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-11-29 22:53:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 22:53:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-11-29 22:53:00,237 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2020-11-29 22:53:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:00,238 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-11-29 22:53:00,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-11-29 22:53:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-11-29 22:53:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-29 22:53:00,238 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:00,238 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:00,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-29 22:53:00,439 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:00,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:00,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1436278758, now seen corresponding path program 69 times [2020-11-29 22:53:00,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:00,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054204194] [2020-11-29 22:53:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:02,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054204194] [2020-11-29 22:53:02,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913973961] [2020-11-29 22:53:02,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:02,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2020-11-29 22:53:02,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:02,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 71 conjunts are in the unsatisfiable core [2020-11-29 22:53:02,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:02,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:02,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2020-11-29 22:53:02,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239247573] [2020-11-29 22:53:02,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-11-29 22:53:02,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:02,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-11-29 22:53:02,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-11-29 22:53:02,924 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 72 states. [2020-11-29 22:53:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:03,073 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-11-29 22:53:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-29 22:53:03,073 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 77 [2020-11-29 22:53:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:03,074 INFO L225 Difference]: With dead ends: 84 [2020-11-29 22:53:03,074 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 22:53:03,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-11-29 22:53:03,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 22:53:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-11-29 22:53:03,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-29 22:53:03,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-11-29 22:53:03,077 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2020-11-29 22:53:03,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:03,078 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-11-29 22:53:03,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-11-29 22:53:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-11-29 22:53:03,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-29 22:53:03,078 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:03,078 INFO L422 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:03,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:03,290 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:03,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:03,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1626591534, now seen corresponding path program 70 times [2020-11-29 22:53:03,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:03,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250991769] [2020-11-29 22:53:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:06,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250991769] [2020-11-29 22:53:06,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178157091] [2020-11-29 22:53:06,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:06,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:53:06,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 72 conjunts are in the unsatisfiable core [2020-11-29 22:53:06,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:06,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:06,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2020-11-29 22:53:06,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870790833] [2020-11-29 22:53:06,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-11-29 22:53:06,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:06,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-11-29 22:53:06,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-11-29 22:53:06,149 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 73 states. [2020-11-29 22:53:06,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:06,312 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-11-29 22:53:06,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-29 22:53:06,312 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 78 [2020-11-29 22:53:06,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:06,313 INFO L225 Difference]: With dead ends: 85 [2020-11-29 22:53:06,313 INFO L226 Difference]: Without dead ends: 80 [2020-11-29 22:53:06,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-11-29 22:53:06,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-29 22:53:06,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-11-29 22:53:06,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 22:53:06,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-11-29 22:53:06,317 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2020-11-29 22:53:06,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:06,317 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-11-29 22:53:06,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-11-29 22:53:06,318 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-11-29 22:53:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-29 22:53:06,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:06,319 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:06,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-11-29 22:53:06,530 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:06,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1063647002, now seen corresponding path program 71 times [2020-11-29 22:53:06,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:06,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182670080] [2020-11-29 22:53:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:09,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182670080] [2020-11-29 22:53:09,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345657706] [2020-11-29 22:53:09,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:09,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-11-29 22:53:09,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:09,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 73 conjunts are in the unsatisfiable core [2020-11-29 22:53:09,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:09,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:09,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2020-11-29 22:53:09,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430295714] [2020-11-29 22:53:09,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-11-29 22:53:09,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:09,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-11-29 22:53:09,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-11-29 22:53:09,336 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 74 states. [2020-11-29 22:53:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:09,597 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-11-29 22:53:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-11-29 22:53:09,598 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 79 [2020-11-29 22:53:09,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:09,599 INFO L225 Difference]: With dead ends: 86 [2020-11-29 22:53:09,599 INFO L226 Difference]: Without dead ends: 81 [2020-11-29 22:53:09,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-11-29 22:53:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-29 22:53:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-11-29 22:53:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-29 22:53:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-11-29 22:53:09,604 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2020-11-29 22:53:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:09,604 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-11-29 22:53:09,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-11-29 22:53:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-11-29 22:53:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-29 22:53:09,605 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:09,605 INFO L422 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:09,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:09,818 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:09,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1438304302, now seen corresponding path program 72 times [2020-11-29 22:53:09,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:09,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949863073] [2020-11-29 22:53:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:12,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949863073] [2020-11-29 22:53:12,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652115669] [2020-11-29 22:53:12,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:12,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-11-29 22:53:12,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:12,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 74 conjunts are in the unsatisfiable core [2020-11-29 22:53:12,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:12,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:12,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2020-11-29 22:53:12,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591262726] [2020-11-29 22:53:12,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-11-29 22:53:12,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:12,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-11-29 22:53:12,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-11-29 22:53:12,772 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 75 states. [2020-11-29 22:53:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:12,915 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-11-29 22:53:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-29 22:53:12,916 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 80 [2020-11-29 22:53:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:12,918 INFO L225 Difference]: With dead ends: 87 [2020-11-29 22:53:12,918 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 22:53:12,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-11-29 22:53:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 22:53:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-11-29 22:53:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-29 22:53:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-11-29 22:53:12,922 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2020-11-29 22:53:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:12,922 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-11-29 22:53:12,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-11-29 22:53:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-11-29 22:53:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-29 22:53:12,923 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:12,923 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:13,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:13,138 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1689383398, now seen corresponding path program 73 times [2020-11-29 22:53:13,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:13,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658746435] [2020-11-29 22:53:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:16,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658746435] [2020-11-29 22:53:16,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089870572] [2020-11-29 22:53:16,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:16,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 75 conjunts are in the unsatisfiable core [2020-11-29 22:53:16,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:16,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:16,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2020-11-29 22:53:16,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810702045] [2020-11-29 22:53:16,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-11-29 22:53:16,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:16,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-11-29 22:53:16,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-11-29 22:53:16,255 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 76 states. [2020-11-29 22:53:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:16,482 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-11-29 22:53:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-29 22:53:16,483 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 81 [2020-11-29 22:53:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:16,484 INFO L225 Difference]: With dead ends: 88 [2020-11-29 22:53:16,484 INFO L226 Difference]: Without dead ends: 83 [2020-11-29 22:53:16,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-11-29 22:53:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-29 22:53:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-11-29 22:53:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-29 22:53:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-11-29 22:53:16,489 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2020-11-29 22:53:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:16,489 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-11-29 22:53:16,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-11-29 22:53:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-11-29 22:53:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-29 22:53:16,490 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:16,491 INFO L422 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:16,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:16,702 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:16,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:16,703 INFO L82 PathProgramCache]: Analyzing trace with hash 882900782, now seen corresponding path program 74 times [2020-11-29 22:53:16,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:16,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550210854] [2020-11-29 22:53:16,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:19,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550210854] [2020-11-29 22:53:19,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391018826] [2020-11-29 22:53:19,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:19,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:53:19,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:19,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 76 conjunts are in the unsatisfiable core [2020-11-29 22:53:19,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:19,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:19,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2020-11-29 22:53:19,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87402776] [2020-11-29 22:53:19,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-11-29 22:53:19,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:19,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-11-29 22:53:19,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-11-29 22:53:19,856 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 77 states. [2020-11-29 22:53:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:20,069 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2020-11-29 22:53:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-11-29 22:53:20,070 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 82 [2020-11-29 22:53:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:20,071 INFO L225 Difference]: With dead ends: 89 [2020-11-29 22:53:20,071 INFO L226 Difference]: Without dead ends: 84 [2020-11-29 22:53:20,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-11-29 22:53:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-29 22:53:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-11-29 22:53:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-29 22:53:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-11-29 22:53:20,075 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2020-11-29 22:53:20,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:20,075 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-11-29 22:53:20,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-11-29 22:53:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-11-29 22:53:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-29 22:53:20,076 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:20,076 INFO L422 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:20,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-11-29 22:53:20,277 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1651743462, now seen corresponding path program 75 times [2020-11-29 22:53:20,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:20,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171620184] [2020-11-29 22:53:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:23,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171620184] [2020-11-29 22:53:23,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788638469] [2020-11-29 22:53:23,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:23,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2020-11-29 22:53:23,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:23,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 77 conjunts are in the unsatisfiable core [2020-11-29 22:53:23,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:23,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:23,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2020-11-29 22:53:23,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940822863] [2020-11-29 22:53:23,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-11-29 22:53:23,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:23,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-11-29 22:53:23,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-11-29 22:53:23,764 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 78 states. [2020-11-29 22:53:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:23,982 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-11-29 22:53:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-11-29 22:53:23,983 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 83 [2020-11-29 22:53:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:23,983 INFO L225 Difference]: With dead ends: 90 [2020-11-29 22:53:23,983 INFO L226 Difference]: Without dead ends: 85 [2020-11-29 22:53:23,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-11-29 22:53:23,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-29 22:53:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-11-29 22:53:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-29 22:53:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-11-29 22:53:23,986 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2020-11-29 22:53:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:23,987 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-11-29 22:53:23,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-11-29 22:53:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-11-29 22:53:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-29 22:53:23,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:23,988 INFO L422 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:24,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:24,198 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:24,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:24,199 INFO L82 PathProgramCache]: Analyzing trace with hash -283937234, now seen corresponding path program 76 times [2020-11-29 22:53:24,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:24,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985489852] [2020-11-29 22:53:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:27,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985489852] [2020-11-29 22:53:27,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791865819] [2020-11-29 22:53:27,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:27,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:53:27,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:27,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 78 conjunts are in the unsatisfiable core [2020-11-29 22:53:27,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:27,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:27,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2020-11-29 22:53:27,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634833145] [2020-11-29 22:53:27,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-11-29 22:53:27,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:27,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-11-29 22:53:27,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-11-29 22:53:27,859 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 79 states. [2020-11-29 22:53:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:28,043 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-11-29 22:53:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-29 22:53:28,044 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 84 [2020-11-29 22:53:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:28,045 INFO L225 Difference]: With dead ends: 91 [2020-11-29 22:53:28,045 INFO L226 Difference]: Without dead ends: 86 [2020-11-29 22:53:28,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-11-29 22:53:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-29 22:53:28,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-11-29 22:53:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-29 22:53:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-11-29 22:53:28,050 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2020-11-29 22:53:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:28,051 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-11-29 22:53:28,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-11-29 22:53:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-11-29 22:53:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-29 22:53:28,052 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:28,052 INFO L422 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:28,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:28,274 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:28,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:28,275 INFO L82 PathProgramCache]: Analyzing trace with hash -160496666, now seen corresponding path program 77 times [2020-11-29 22:53:28,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:28,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204149375] [2020-11-29 22:53:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:32,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204149375] [2020-11-29 22:53:32,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45696847] [2020-11-29 22:53:32,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:32,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2020-11-29 22:53:32,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:32,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 79 conjunts are in the unsatisfiable core [2020-11-29 22:53:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:32,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:32,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2020-11-29 22:53:32,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592759011] [2020-11-29 22:53:32,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-29 22:53:32,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:32,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-29 22:53:32,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-11-29 22:53:32,155 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 80 states. [2020-11-29 22:53:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:32,427 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-11-29 22:53:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-29 22:53:32,428 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 85 [2020-11-29 22:53:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:32,429 INFO L225 Difference]: With dead ends: 92 [2020-11-29 22:53:32,429 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 22:53:32,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-11-29 22:53:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 22:53:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-11-29 22:53:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-29 22:53:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-11-29 22:53:32,433 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2020-11-29 22:53:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:32,434 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-11-29 22:53:32,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-29 22:53:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-11-29 22:53:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-29 22:53:32,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:32,435 INFO L422 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:32,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-11-29 22:53:32,654 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:32,655 INFO L82 PathProgramCache]: Analyzing trace with hash -628806354, now seen corresponding path program 78 times [2020-11-29 22:53:32,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:32,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332525598] [2020-11-29 22:53:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:36,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332525598] [2020-11-29 22:53:36,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786683059] [2020-11-29 22:53:36,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:36,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2020-11-29 22:53:36,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:36,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 80 conjunts are in the unsatisfiable core [2020-11-29 22:53:36,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:36,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:36,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2020-11-29 22:53:36,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250127647] [2020-11-29 22:53:36,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-11-29 22:53:36,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:36,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-11-29 22:53:36,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-11-29 22:53:36,459 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 81 states. [2020-11-29 22:53:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:36,683 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-11-29 22:53:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-11-29 22:53:36,684 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 86 [2020-11-29 22:53:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:36,684 INFO L225 Difference]: With dead ends: 93 [2020-11-29 22:53:36,684 INFO L226 Difference]: Without dead ends: 88 [2020-11-29 22:53:36,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-11-29 22:53:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-29 22:53:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-11-29 22:53:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 22:53:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-11-29 22:53:36,688 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2020-11-29 22:53:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:36,688 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-11-29 22:53:36,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-11-29 22:53:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-11-29 22:53:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-29 22:53:36,689 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:36,689 INFO L422 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:36,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-29 22:53:36,902 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:36,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:36,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2033462502, now seen corresponding path program 79 times [2020-11-29 22:53:36,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:36,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809655644] [2020-11-29 22:53:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:40,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809655644] [2020-11-29 22:53:40,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499616395] [2020-11-29 22:53:40,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:40,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 81 conjunts are in the unsatisfiable core [2020-11-29 22:53:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:40,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:40,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2020-11-29 22:53:40,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002894457] [2020-11-29 22:53:40,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-11-29 22:53:40,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-11-29 22:53:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-11-29 22:53:40,814 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 82 states. [2020-11-29 22:53:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:40,944 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-11-29 22:53:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-29 22:53:40,944 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 87 [2020-11-29 22:53:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:40,945 INFO L225 Difference]: With dead ends: 94 [2020-11-29 22:53:40,945 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 22:53:40,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-11-29 22:53:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 22:53:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-11-29 22:53:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-29 22:53:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-11-29 22:53:40,949 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2020-11-29 22:53:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:40,950 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-11-29 22:53:40,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-11-29 22:53:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-11-29 22:53:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-29 22:53:40,951 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:40,951 INFO L422 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:41,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:41,178 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:41,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:41,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1335548882, now seen corresponding path program 80 times [2020-11-29 22:53:41,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:41,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298099669] [2020-11-29 22:53:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:45,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298099669] [2020-11-29 22:53:45,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675792335] [2020-11-29 22:53:45,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:45,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:53:45,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:45,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 82 conjunts are in the unsatisfiable core [2020-11-29 22:53:45,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:45,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:45,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2020-11-29 22:53:45,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276991988] [2020-11-29 22:53:45,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-11-29 22:53:45,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:45,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-11-29 22:53:45,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-11-29 22:53:45,256 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 83 states. [2020-11-29 22:53:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:45,481 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-11-29 22:53:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-11-29 22:53:45,481 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 88 [2020-11-29 22:53:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:45,482 INFO L225 Difference]: With dead ends: 95 [2020-11-29 22:53:45,482 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 22:53:45,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-11-29 22:53:45,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 22:53:45,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-11-29 22:53:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-29 22:53:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-11-29 22:53:45,485 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2020-11-29 22:53:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:45,485 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-11-29 22:53:45,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-11-29 22:53:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-11-29 22:53:45,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-29 22:53:45,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:45,485 INFO L422 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:45,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:45,686 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:45,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:45,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1599280614, now seen corresponding path program 81 times [2020-11-29 22:53:45,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:45,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217598818] [2020-11-29 22:53:45,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:49,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217598818] [2020-11-29 22:53:49,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903922744] [2020-11-29 22:53:49,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:49,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2020-11-29 22:53:49,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:49,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 83 conjunts are in the unsatisfiable core [2020-11-29 22:53:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:49,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:49,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2020-11-29 22:53:49,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765033667] [2020-11-29 22:53:49,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-11-29 22:53:49,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:49,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-11-29 22:53:49,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-11-29 22:53:49,960 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 84 states. [2020-11-29 22:53:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:50,190 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-11-29 22:53:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-11-29 22:53:50,192 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 89 [2020-11-29 22:53:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:50,192 INFO L225 Difference]: With dead ends: 96 [2020-11-29 22:53:50,192 INFO L226 Difference]: Without dead ends: 91 [2020-11-29 22:53:50,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-11-29 22:53:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-29 22:53:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-11-29 22:53:50,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-29 22:53:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-11-29 22:53:50,196 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2020-11-29 22:53:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:50,196 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-11-29 22:53:50,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-11-29 22:53:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-11-29 22:53:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-29 22:53:50,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:50,198 INFO L422 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:50,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:50,411 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:50,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1910285522, now seen corresponding path program 82 times [2020-11-29 22:53:50,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:50,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853725162] [2020-11-29 22:53:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:55,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853725162] [2020-11-29 22:53:55,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186116351] [2020-11-29 22:53:55,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:55,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:53:55,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:55,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 84 conjunts are in the unsatisfiable core [2020-11-29 22:53:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:53:55,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:55,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2020-11-29 22:53:55,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702854428] [2020-11-29 22:53:55,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-11-29 22:53:55,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:55,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-11-29 22:53:55,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-11-29 22:53:55,342 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 85 states. [2020-11-29 22:53:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:55,566 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2020-11-29 22:53:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-11-29 22:53:55,567 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 90 [2020-11-29 22:53:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:55,568 INFO L225 Difference]: With dead ends: 97 [2020-11-29 22:53:55,568 INFO L226 Difference]: Without dead ends: 92 [2020-11-29 22:53:55,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-11-29 22:53:55,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-29 22:53:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-11-29 22:53:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-29 22:53:55,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-11-29 22:53:55,573 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2020-11-29 22:53:55,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:55,573 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-11-29 22:53:55,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-11-29 22:53:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-11-29 22:53:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-29 22:53:55,574 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:55,575 INFO L422 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:55,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:55,778 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:53:55,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:55,779 INFO L82 PathProgramCache]: Analyzing trace with hash 962313958, now seen corresponding path program 83 times [2020-11-29 22:53:55,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:55,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634741239] [2020-11-29 22:53:55,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:00,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634741239] [2020-11-29 22:54:00,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357029616] [2020-11-29 22:54:00,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:00,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-11-29 22:54:00,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:54:00,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 85 conjunts are in the unsatisfiable core [2020-11-29 22:54:00,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:54:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:00,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:54:00,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2020-11-29 22:54:00,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378422186] [2020-11-29 22:54:00,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-11-29 22:54:00,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:54:00,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-11-29 22:54:00,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-11-29 22:54:00,618 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 86 states. [2020-11-29 22:54:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:54:00,866 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-11-29 22:54:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-11-29 22:54:00,867 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 91 [2020-11-29 22:54:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:54:00,868 INFO L225 Difference]: With dead ends: 98 [2020-11-29 22:54:00,868 INFO L226 Difference]: Without dead ends: 93 [2020-11-29 22:54:00,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-11-29 22:54:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-29 22:54:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-11-29 22:54:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-29 22:54:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-11-29 22:54:00,872 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2020-11-29 22:54:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:54:00,872 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-11-29 22:54:00,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-11-29 22:54:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-11-29 22:54:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-29 22:54:00,873 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:54:00,873 INFO L422 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:54:01,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:01,078 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:54:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:54:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash -181415378, now seen corresponding path program 84 times [2020-11-29 22:54:01,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:54:01,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371503501] [2020-11-29 22:54:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:54:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:05,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371503501] [2020-11-29 22:54:05,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224274847] [2020-11-29 22:54:05,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:05,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-11-29 22:54:05,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:54:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 86 conjunts are in the unsatisfiable core [2020-11-29 22:54:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:54:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:05,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:54:05,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2020-11-29 22:54:05,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373985327] [2020-11-29 22:54:05,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-11-29 22:54:05,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:54:05,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-11-29 22:54:05,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-11-29 22:54:05,823 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 87 states. [2020-11-29 22:54:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:54:06,087 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-11-29 22:54:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-11-29 22:54:06,088 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 92 [2020-11-29 22:54:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:54:06,089 INFO L225 Difference]: With dead ends: 99 [2020-11-29 22:54:06,089 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 22:54:06,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-11-29 22:54:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 22:54:06,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-11-29 22:54:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 22:54:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-11-29 22:54:06,093 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2020-11-29 22:54:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:54:06,094 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-11-29 22:54:06,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-11-29 22:54:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-11-29 22:54:06,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-29 22:54:06,095 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:54:06,095 INFO L422 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:54:06,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2020-11-29 22:54:06,310 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:54:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:54:06,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1277286426, now seen corresponding path program 85 times [2020-11-29 22:54:06,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:54:06,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127990538] [2020-11-29 22:54:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:54:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:11,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127990538] [2020-11-29 22:54:11,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082027221] [2020-11-29 22:54:11,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:11,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 87 conjunts are in the unsatisfiable core [2020-11-29 22:54:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:54:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:11,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:54:11,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2020-11-29 22:54:11,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598609533] [2020-11-29 22:54:11,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-11-29 22:54:11,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:54:11,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-11-29 22:54:11,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-11-29 22:54:11,381 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 88 states. [2020-11-29 22:54:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:54:11,652 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-11-29 22:54:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-11-29 22:54:11,653 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 93 [2020-11-29 22:54:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:54:11,654 INFO L225 Difference]: With dead ends: 100 [2020-11-29 22:54:11,654 INFO L226 Difference]: Without dead ends: 95 [2020-11-29 22:54:11,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-11-29 22:54:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-29 22:54:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-11-29 22:54:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-29 22:54:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-11-29 22:54:11,659 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2020-11-29 22:54:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:54:11,659 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-11-29 22:54:11,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-11-29 22:54:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-11-29 22:54:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-29 22:54:11,660 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:54:11,660 INFO L422 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:54:11,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:11,870 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:54:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:54:11,871 INFO L82 PathProgramCache]: Analyzing trace with hash -889550546, now seen corresponding path program 86 times [2020-11-29 22:54:11,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:54:11,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696060205] [2020-11-29 22:54:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:54:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:16,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696060205] [2020-11-29 22:54:16,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754128418] [2020-11-29 22:54:16,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:16,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:54:16,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:54:16,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 88 conjunts are in the unsatisfiable core [2020-11-29 22:54:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:54:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:17,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:54:17,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2020-11-29 22:54:17,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264643035] [2020-11-29 22:54:17,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-11-29 22:54:17,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:54:17,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-11-29 22:54:17,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-11-29 22:54:17,036 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 89 states. [2020-11-29 22:54:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:54:17,432 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-11-29 22:54:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-11-29 22:54:17,433 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 94 [2020-11-29 22:54:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:54:17,434 INFO L225 Difference]: With dead ends: 101 [2020-11-29 22:54:17,434 INFO L226 Difference]: Without dead ends: 96 [2020-11-29 22:54:17,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-11-29 22:54:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-29 22:54:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-11-29 22:54:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-29 22:54:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-11-29 22:54:17,437 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2020-11-29 22:54:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:54:17,437 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-11-29 22:54:17,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-11-29 22:54:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-11-29 22:54:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-29 22:54:17,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:54:17,438 INFO L422 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:54:17,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-11-29 22:54:17,642 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:54:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:54:17,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1754640154, now seen corresponding path program 87 times [2020-11-29 22:54:17,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:54:17,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303661209] [2020-11-29 22:54:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:54:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:22,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303661209] [2020-11-29 22:54:22,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709760973] [2020-11-29 22:54:22,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:23,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2020-11-29 22:54:23,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:54:23,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 89 conjunts are in the unsatisfiable core [2020-11-29 22:54:23,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:54:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:23,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:54:23,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2020-11-29 22:54:23,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182328827] [2020-11-29 22:54:23,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-11-29 22:54:23,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:54:23,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-11-29 22:54:23,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-11-29 22:54:23,127 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 90 states. [2020-11-29 22:54:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:54:23,617 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-11-29 22:54:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-11-29 22:54:23,618 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 95 [2020-11-29 22:54:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:54:23,619 INFO L225 Difference]: With dead ends: 102 [2020-11-29 22:54:23,619 INFO L226 Difference]: Without dead ends: 97 [2020-11-29 22:54:23,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-11-29 22:54:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-29 22:54:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-11-29 22:54:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-29 22:54:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-11-29 22:54:23,623 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2020-11-29 22:54:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:54:23,623 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-11-29 22:54:23,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-11-29 22:54:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-11-29 22:54:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-29 22:54:23,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:54:23,624 INFO L422 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:54:23,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-11-29 22:54:23,842 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:54:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:54:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1492353070, now seen corresponding path program 88 times [2020-11-29 22:54:23,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:54:23,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060520388] [2020-11-29 22:54:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:54:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:28,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060520388] [2020-11-29 22:54:28,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852213814] [2020-11-29 22:54:28,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:28,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:54:28,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:54:28,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 90 conjunts are in the unsatisfiable core [2020-11-29 22:54:28,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:54:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:28,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:54:28,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2020-11-29 22:54:28,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550212904] [2020-11-29 22:54:28,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-11-29 22:54:28,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:54:28,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-11-29 22:54:28,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-11-29 22:54:28,606 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 91 states. [2020-11-29 22:54:28,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:54:28,824 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-11-29 22:54:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-11-29 22:54:28,825 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 96 [2020-11-29 22:54:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:54:28,825 INFO L225 Difference]: With dead ends: 103 [2020-11-29 22:54:28,825 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 22:54:28,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-11-29 22:54:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 22:54:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-11-29 22:54:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-29 22:54:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-11-29 22:54:28,829 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2020-11-29 22:54:28,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:54:28,829 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-11-29 22:54:28,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-11-29 22:54:28,829 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-11-29 22:54:28,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-29 22:54:28,830 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:54:28,830 INFO L422 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:54:29,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:29,046 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:54:29,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:54:29,047 INFO L82 PathProgramCache]: Analyzing trace with hash -930072090, now seen corresponding path program 89 times [2020-11-29 22:54:29,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:54:29,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762679865] [2020-11-29 22:54:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:54:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:34,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762679865] [2020-11-29 22:54:34,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297380100] [2020-11-29 22:54:34,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:34,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2020-11-29 22:54:34,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:54:34,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 91 conjunts are in the unsatisfiable core [2020-11-29 22:54:34,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:54:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:34,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:54:34,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2020-11-29 22:54:34,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763514389] [2020-11-29 22:54:34,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-11-29 22:54:34,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:54:34,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-11-29 22:54:34,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-11-29 22:54:34,718 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 92 states. [2020-11-29 22:54:35,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:54:35,006 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-11-29 22:54:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-11-29 22:54:35,007 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 97 [2020-11-29 22:54:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:54:35,008 INFO L225 Difference]: With dead ends: 104 [2020-11-29 22:54:35,008 INFO L226 Difference]: Without dead ends: 99 [2020-11-29 22:54:35,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-11-29 22:54:35,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-29 22:54:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-11-29 22:54:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-29 22:54:35,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-11-29 22:54:35,011 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2020-11-29 22:54:35,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:54:35,011 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-11-29 22:54:35,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-11-29 22:54:35,012 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-11-29 22:54:35,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-29 22:54:35,013 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:54:35,013 INFO L422 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:54:35,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:35,219 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:54:35,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:54:35,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1284159278, now seen corresponding path program 90 times [2020-11-29 22:54:35,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:54:35,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806758183] [2020-11-29 22:54:35,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:54:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:40,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806758183] [2020-11-29 22:54:40,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745011438] [2020-11-29 22:54:40,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:41,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2020-11-29 22:54:41,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:54:41,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 92 conjunts are in the unsatisfiable core [2020-11-29 22:54:41,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:54:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:41,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:54:41,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2020-11-29 22:54:41,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86104938] [2020-11-29 22:54:41,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-11-29 22:54:41,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:54:41,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-11-29 22:54:41,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-11-29 22:54:41,145 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 93 states. [2020-11-29 22:54:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:54:41,416 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-11-29 22:54:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-11-29 22:54:41,417 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 98 [2020-11-29 22:54:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:54:41,418 INFO L225 Difference]: With dead ends: 105 [2020-11-29 22:54:41,418 INFO L226 Difference]: Without dead ends: 100 [2020-11-29 22:54:41,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-11-29 22:54:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-29 22:54:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-11-29 22:54:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-29 22:54:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-11-29 22:54:41,421 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2020-11-29 22:54:41,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:54:41,421 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-11-29 22:54:41,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-11-29 22:54:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-11-29 22:54:41,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-29 22:54:41,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:54:41,422 INFO L422 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:54:41,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:41,623 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:54:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:54:41,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1205854950, now seen corresponding path program 91 times [2020-11-29 22:54:41,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:54:41,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366321025] [2020-11-29 22:54:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:54:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:47,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366321025] [2020-11-29 22:54:47,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938079431] [2020-11-29 22:54:47,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:47,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 93 conjunts are in the unsatisfiable core [2020-11-29 22:54:47,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:54:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:47,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:54:47,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2020-11-29 22:54:47,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300545260] [2020-11-29 22:54:47,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-11-29 22:54:47,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:54:47,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-11-29 22:54:47,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-11-29 22:54:47,876 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 94 states. [2020-11-29 22:54:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:54:48,372 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-11-29 22:54:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-29 22:54:48,373 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 99 [2020-11-29 22:54:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:54:48,374 INFO L225 Difference]: With dead ends: 106 [2020-11-29 22:54:48,374 INFO L226 Difference]: Without dead ends: 101 [2020-11-29 22:54:48,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-11-29 22:54:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-29 22:54:48,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-11-29 22:54:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-29 22:54:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-11-29 22:54:48,377 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2020-11-29 22:54:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:54:48,377 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-11-29 22:54:48,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-11-29 22:54:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-11-29 22:54:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-29 22:54:48,378 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:54:48,378 INFO L422 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:54:48,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2020-11-29 22:54:48,579 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:54:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:54:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1221579218, now seen corresponding path program 92 times [2020-11-29 22:54:48,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:54:48,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457552776] [2020-11-29 22:54:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:54:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:54:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:54,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457552776] [2020-11-29 22:54:54,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483724534] [2020-11-29 22:54:54,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:54,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:54:54,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:54:54,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 94 conjunts are in the unsatisfiable core [2020-11-29 22:54:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:54:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:54,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:54:54,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2020-11-29 22:54:54,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764197871] [2020-11-29 22:54:54,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-11-29 22:54:54,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:54:54,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-11-29 22:54:54,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-11-29 22:54:54,855 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 95 states. [2020-11-29 22:54:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:54:55,171 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-11-29 22:54:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-11-29 22:54:55,173 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 100 [2020-11-29 22:54:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:54:55,174 INFO L225 Difference]: With dead ends: 107 [2020-11-29 22:54:55,174 INFO L226 Difference]: Without dead ends: 102 [2020-11-29 22:54:55,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-11-29 22:54:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-29 22:54:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-11-29 22:54:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-29 22:54:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-11-29 22:54:55,180 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2020-11-29 22:54:55,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:54:55,180 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-11-29 22:54:55,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-11-29 22:54:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-11-29 22:54:55,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-29 22:54:55,181 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:54:55,181 INFO L422 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:54:55,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:54:55,387 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:54:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:54:55,387 INFO L82 PathProgramCache]: Analyzing trace with hash 837372902, now seen corresponding path program 93 times [2020-11-29 22:54:55,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:54:55,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886973767] [2020-11-29 22:54:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:54:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:01,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886973767] [2020-11-29 22:55:01,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721829959] [2020-11-29 22:55:01,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:01,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2020-11-29 22:55:01,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:55:01,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 95 conjunts are in the unsatisfiable core [2020-11-29 22:55:01,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:01,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:01,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2020-11-29 22:55:01,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829033842] [2020-11-29 22:55:01,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-11-29 22:55:01,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:01,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-11-29 22:55:01,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-11-29 22:55:01,690 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 96 states. [2020-11-29 22:55:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:02,024 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-11-29 22:55:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-11-29 22:55:02,025 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 101 [2020-11-29 22:55:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:55:02,026 INFO L225 Difference]: With dead ends: 108 [2020-11-29 22:55:02,026 INFO L226 Difference]: Without dead ends: 103 [2020-11-29 22:55:02,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-11-29 22:55:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-29 22:55:02,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-11-29 22:55:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-29 22:55:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-11-29 22:55:02,029 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2020-11-29 22:55:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:55:02,029 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-11-29 22:55:02,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-11-29 22:55:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-11-29 22:55:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-29 22:55:02,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:55:02,030 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:55:02,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2020-11-29 22:55:02,231 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:55:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:02,231 INFO L82 PathProgramCache]: Analyzing trace with hash 240379182, now seen corresponding path program 94 times [2020-11-29 22:55:02,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:02,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74307058] [2020-11-29 22:55:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:08,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74307058] [2020-11-29 22:55:08,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504472090] [2020-11-29 22:55:08,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:08,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:55:08,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:55:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 96 conjunts are in the unsatisfiable core [2020-11-29 22:55:08,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:08,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:08,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2020-11-29 22:55:08,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192652750] [2020-11-29 22:55:08,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-11-29 22:55:08,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:08,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-11-29 22:55:08,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-11-29 22:55:08,913 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 97 states. [2020-11-29 22:55:09,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:09,158 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2020-11-29 22:55:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-11-29 22:55:09,159 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 102 [2020-11-29 22:55:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:55:09,160 INFO L225 Difference]: With dead ends: 109 [2020-11-29 22:55:09,160 INFO L226 Difference]: Without dead ends: 104 [2020-11-29 22:55:09,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-11-29 22:55:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-29 22:55:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-11-29 22:55:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-29 22:55:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-11-29 22:55:09,165 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2020-11-29 22:55:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:55:09,166 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-11-29 22:55:09,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-11-29 22:55:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-11-29 22:55:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-29 22:55:09,167 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:55:09,167 INFO L422 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:55:09,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:09,382 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:55:09,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:09,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1086556954, now seen corresponding path program 95 times [2020-11-29 22:55:09,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:09,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368231779] [2020-11-29 22:55:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:15,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368231779] [2020-11-29 22:55:15,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695728675] [2020-11-29 22:55:15,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:16,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2020-11-29 22:55:16,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:55:16,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 97 conjunts are in the unsatisfiable core [2020-11-29 22:55:16,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:16,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:16,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2020-11-29 22:55:16,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928663375] [2020-11-29 22:55:16,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-11-29 22:55:16,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:16,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-11-29 22:55:16,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-11-29 22:55:16,157 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 98 states. [2020-11-29 22:55:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:16,418 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-11-29 22:55:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-11-29 22:55:16,419 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 103 [2020-11-29 22:55:16,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:55:16,420 INFO L225 Difference]: With dead ends: 110 [2020-11-29 22:55:16,420 INFO L226 Difference]: Without dead ends: 105 [2020-11-29 22:55:16,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-11-29 22:55:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-11-29 22:55:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-11-29 22:55:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-29 22:55:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-11-29 22:55:16,425 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2020-11-29 22:55:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:55:16,425 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-11-29 22:55:16,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-11-29 22:55:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-11-29 22:55:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-11-29 22:55:16,426 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:55:16,426 INFO L422 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:55:16,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:16,626 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:55:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:16,627 INFO L82 PathProgramCache]: Analyzing trace with hash 728095790, now seen corresponding path program 96 times [2020-11-29 22:55:16,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:16,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759675387] [2020-11-29 22:55:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:23,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759675387] [2020-11-29 22:55:23,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356584156] [2020-11-29 22:55:23,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:23,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-11-29 22:55:23,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:55:23,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 98 conjunts are in the unsatisfiable core [2020-11-29 22:55:23,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:23,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:23,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2020-11-29 22:55:23,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734875111] [2020-11-29 22:55:23,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-11-29 22:55:23,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:23,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-11-29 22:55:23,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2020-11-29 22:55:23,952 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 99 states. [2020-11-29 22:55:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:24,335 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-11-29 22:55:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-11-29 22:55:24,336 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 104 [2020-11-29 22:55:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:55:24,337 INFO L225 Difference]: With dead ends: 111 [2020-11-29 22:55:24,337 INFO L226 Difference]: Without dead ends: 106 [2020-11-29 22:55:24,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2020-11-29 22:55:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-29 22:55:24,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-11-29 22:55:24,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 22:55:24,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2020-11-29 22:55:24,345 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2020-11-29 22:55:24,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:55:24,346 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2020-11-29 22:55:24,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-11-29 22:55:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2020-11-29 22:55:24,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-29 22:55:24,347 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:55:24,347 INFO L422 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:55:24,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-11-29 22:55:24,561 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:55:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1147756006, now seen corresponding path program 97 times [2020-11-29 22:55:24,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:24,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606436673] [2020-11-29 22:55:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:31,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606436673] [2020-11-29 22:55:31,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106282651] [2020-11-29 22:55:31,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:31,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 99 conjunts are in the unsatisfiable core [2020-11-29 22:55:31,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:31,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:31,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2020-11-29 22:55:31,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467528120] [2020-11-29 22:55:31,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-11-29 22:55:31,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:31,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-11-29 22:55:31,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-11-29 22:55:31,809 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 100 states. [2020-11-29 22:55:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:32,055 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-11-29 22:55:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-11-29 22:55:32,056 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 105 [2020-11-29 22:55:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:55:32,056 INFO L225 Difference]: With dead ends: 112 [2020-11-29 22:55:32,056 INFO L226 Difference]: Without dead ends: 107 [2020-11-29 22:55:32,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-11-29 22:55:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-29 22:55:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-11-29 22:55:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-29 22:55:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-11-29 22:55:32,059 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2020-11-29 22:55:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:55:32,060 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-11-29 22:55:32,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-11-29 22:55:32,060 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-11-29 22:55:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-29 22:55:32,063 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:55:32,063 INFO L422 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:55:32,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:32,282 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:55:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:32,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1272320814, now seen corresponding path program 98 times [2020-11-29 22:55:32,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:32,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50530636] [2020-11-29 22:55:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:39,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50530636] [2020-11-29 22:55:39,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536201078] [2020-11-29 22:55:39,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:39,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:55:39,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:55:39,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 100 conjunts are in the unsatisfiable core [2020-11-29 22:55:39,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:39,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:39,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2020-11-29 22:55:39,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631371989] [2020-11-29 22:55:39,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-11-29 22:55:39,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:39,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-11-29 22:55:39,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-11-29 22:55:39,725 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 101 states. [2020-11-29 22:55:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:40,105 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2020-11-29 22:55:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-11-29 22:55:40,106 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 106 [2020-11-29 22:55:40,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:55:40,107 INFO L225 Difference]: With dead ends: 113 [2020-11-29 22:55:40,107 INFO L226 Difference]: Without dead ends: 108 [2020-11-29 22:55:40,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-11-29 22:55:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-29 22:55:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-11-29 22:55:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-29 22:55:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-11-29 22:55:40,113 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2020-11-29 22:55:40,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:55:40,113 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-11-29 22:55:40,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-11-29 22:55:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-11-29 22:55:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-29 22:55:40,114 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:55:40,115 INFO L422 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:55:40,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:40,322 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:55:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash 838862566, now seen corresponding path program 99 times [2020-11-29 22:55:40,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:40,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009906227] [2020-11-29 22:55:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:48,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009906227] [2020-11-29 22:55:48,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335433004] [2020-11-29 22:55:48,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:48,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2020-11-29 22:55:48,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:55:48,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 101 conjunts are in the unsatisfiable core [2020-11-29 22:55:48,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:48,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:48,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2020-11-29 22:55:48,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764257053] [2020-11-29 22:55:48,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-11-29 22:55:48,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:48,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-11-29 22:55:48,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-11-29 22:55:48,331 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 102 states. [2020-11-29 22:55:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:48,701 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-11-29 22:55:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-11-29 22:55:48,702 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 107 [2020-11-29 22:55:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:55:48,703 INFO L225 Difference]: With dead ends: 114 [2020-11-29 22:55:48,703 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 22:55:48,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-11-29 22:55:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 22:55:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-11-29 22:55:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-29 22:55:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-11-29 22:55:48,708 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2020-11-29 22:55:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:55:48,709 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-11-29 22:55:48,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-11-29 22:55:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-11-29 22:55:48,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-11-29 22:55:48,710 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:55:48,710 INFO L422 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:55:48,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-11-29 22:55:48,910 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:55:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash 286558766, now seen corresponding path program 100 times [2020-11-29 22:55:48,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:48,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887212240] [2020-11-29 22:55:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:58,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887212240] [2020-11-29 22:55:58,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008692129] [2020-11-29 22:55:58,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:58,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:55:58,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:55:58,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 205 conjunts are in the unsatisfiable core [2020-11-29 22:55:58,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:58,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:55:58,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:55:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:59,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:59,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2020-11-29 22:55:59,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515660614] [2020-11-29 22:55:59,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-11-29 22:55:59,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:59,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-11-29 22:55:59,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2020-11-29 22:55:59,005 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 105 states. [2020-11-29 22:56:08,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:08,262 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2020-11-29 22:56:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-11-29 22:56:08,265 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 108 [2020-11-29 22:56:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:56:08,265 INFO L225 Difference]: With dead ends: 115 [2020-11-29 22:56:08,266 INFO L226 Difference]: Without dead ends: 110 [2020-11-29 22:56:08,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=213, Invalid=10917, Unknown=0, NotChecked=0, Total=11130 [2020-11-29 22:56:08,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-29 22:56:08,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-11-29 22:56:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-29 22:56:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2020-11-29 22:56:08,275 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2020-11-29 22:56:08,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:56:08,275 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2020-11-29 22:56:08,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-11-29 22:56:08,275 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2020-11-29 22:56:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-29 22:56:08,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:56:08,276 INFO L422 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:56:08,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-11-29 22:56:08,482 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:56:08,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:08,483 INFO L82 PathProgramCache]: Analyzing trace with hash 345010150, now seen corresponding path program 101 times [2020-11-29 22:56:08,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:08,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236042094] [2020-11-29 22:56:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:17,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236042094] [2020-11-29 22:56:17,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:56:17,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2020-11-29 22:56:17,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931722713] [2020-11-29 22:56:17,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-11-29 22:56:17,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:17,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-11-29 22:56:17,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-11-29 22:56:17,205 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 103 states. [2020-11-29 22:56:17,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:17,581 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-11-29 22:56:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-11-29 22:56:17,582 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 109 [2020-11-29 22:56:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:56:17,583 INFO L225 Difference]: With dead ends: 110 [2020-11-29 22:56:17,583 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 22:56:17,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-11-29 22:56:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 22:56:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 22:56:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 22:56:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 22:56:17,584 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-11-29 22:56:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:56:17,584 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:56:17,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-11-29 22:56:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 22:56:17,584 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 22:56:17,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2020-11-29 22:56:17,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 22:56:17,866 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 658 [2020-11-29 22:56:20,749 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification that was a NOOP. DAG size: 658 [2020-11-29 22:56:20,755 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 22:56:20,758 INFO L270 CegarLoopResult]: At program point L23-2(lines 23 26) the Hoare annotation is: (or (and (<= 59 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 118) (<= 118 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 59)) (and (<= 23 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 46) (<= 46 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 23)) (and (<= 63 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 126) (<= ULTIMATE.start_main_~i~0 63) (<= 126 ULTIMATE.start_main_~j~0)) (and (<= 176 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 88) (<= ULTIMATE.start_main_~j~0 176) (<= 88 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 82) (<= 164 ULTIMATE.start_main_~j~0) (<= 82 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 164)) (and (<= ULTIMATE.start_main_~i~0 3) (<= 6 ULTIMATE.start_main_~j~0) (<= 3 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 6)) (and (<= ULTIMATE.start_main_~j~0 144) (<= 72 ULTIMATE.start_main_~i~0) (<= 144 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 72)) (and (<= 156 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 78) (<= ULTIMATE.start_main_~j~0 156) (<= 78 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 92) (<= 184 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 184) (<= 92 ULTIMATE.start_main_~i~0)) (and (<= 68 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 68) (<= ULTIMATE.start_main_~j~0 136) (<= 136 ULTIMATE.start_main_~j~0)) (and (<= 43 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 86) (<= ULTIMATE.start_main_~i~0 43) (<= 86 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 148) (<= 148 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 74) (<= 74 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 94) (<= 94 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 47) (<= 47 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 58) (<= ULTIMATE.start_main_~i~0 29) (<= 29 ULTIMATE.start_main_~i~0) (<= 58 ULTIMATE.start_main_~j~0)) (and (<= 186 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 93) (<= 93 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 186)) (and (<= ULTIMATE.start_main_~j~0 128) (<= ULTIMATE.start_main_~i~0 64) (<= 64 ULTIMATE.start_main_~i~0) (<= 128 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 30) (<= ULTIMATE.start_main_~i~0 15) (<= 15 ULTIMATE.start_main_~i~0) (<= 30 ULTIMATE.start_main_~j~0)) (and (<= 178 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 89) (<= 89 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 178)) (and (<= 46 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 46) (<= 92 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 92)) (and (<= ULTIMATE.start_main_~i~0 16) (<= 16 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 32) (<= 32 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 70) (<= 70 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 140) (<= 140 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 52) (<= 52 ULTIMATE.start_main_~i~0) (<= 104 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 104)) (and (<= ULTIMATE.start_main_~i~0 26) (<= ULTIMATE.start_main_~j~0 52) (<= 26 ULTIMATE.start_main_~i~0) (<= 52 ULTIMATE.start_main_~j~0)) (and (<= 28 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 14) (<= 14 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 28)) (and (<= 12 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 24) (<= ULTIMATE.start_main_~i~0 12) (<= 24 ULTIMATE.start_main_~j~0)) (and (<= 20 ULTIMATE.start_main_~j~0) (<= 10 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 10) (<= ULTIMATE.start_main_~j~0 20)) (and (<= 85 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 85) (<= ULTIMATE.start_main_~j~0 170) (<= 170 ULTIMATE.start_main_~j~0)) (and (<= 79 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 158) (<= 158 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 79)) (and (<= ULTIMATE.start_main_~j~0 100) (<= 50 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 50) (<= 100 ULTIMATE.start_main_~j~0)) (and (<= 84 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 42) (<= 42 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 84)) (and (<= 154 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 77) (<= 77 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 154)) (and (<= 172 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 172) (<= ULTIMATE.start_main_~i~0 86) (<= 86 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 28) (<= 56 ULTIMATE.start_main_~j~0) (<= 28 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 56)) (and (<= ULTIMATE.start_main_~i~0 75) (<= 150 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 150) (<= 75 ULTIMATE.start_main_~i~0)) (and (<= 114 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 57) (<= 57 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 114)) (and (<= 84 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 168) (<= 168 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 84)) (and (<= ULTIMATE.start_main_~i~0 5) (<= ULTIMATE.start_main_~j~0 10) (<= 5 ULTIMATE.start_main_~i~0) (<= 10 ULTIMATE.start_main_~j~0)) (and (<= 91 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 91) (<= ULTIMATE.start_main_~j~0 182) (<= 182 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 55) (<= 110 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 110) (<= 55 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 68) (<= 68 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 34) (<= 34 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 98) (<= 98 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 196) (<= 196 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 66) (<= 132 ULTIMATE.start_main_~j~0) (<= 66 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 132)) (and (<= 62 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 31) (<= ULTIMATE.start_main_~j~0 62) (<= 31 ULTIMATE.start_main_~i~0)) (and (<= 25 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 25) (<= 50 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 50)) (and (<= ULTIMATE.start_main_~j~0 130) (<= 65 ULTIMATE.start_main_~i~0) (<= 130 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 65)) (and (<= ULTIMATE.start_main_~i~0 83) (<= ULTIMATE.start_main_~j~0 166) (<= 166 ULTIMATE.start_main_~j~0) (<= 83 ULTIMATE.start_main_~i~0)) (and (< 199 ULTIMATE.start_main_~j~0) (<= 100 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 200)) (and (<= ULTIMATE.start_main_~j~0 146) (<= ULTIMATE.start_main_~i~0 73) (<= 73 ULTIMATE.start_main_~i~0) (<= 146 ULTIMATE.start_main_~j~0)) (and (<= 80 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 40) (<= 40 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 80)) (and (<= ULTIMATE.start_main_~j~0 2) (<= 2 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 1) (<= 1 ULTIMATE.start_main_~i~0)) (and (<= 16 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 16) (<= 8 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 8)) (and (<= ULTIMATE.start_main_~i~0 24) (<= ULTIMATE.start_main_~j~0 48) (<= 48 ULTIMATE.start_main_~j~0) (<= 24 ULTIMATE.start_main_~i~0)) (and (<= 162 ULTIMATE.start_main_~j~0) (<= 81 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 81) (<= ULTIMATE.start_main_~j~0 162)) (and (<= 69 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 69) (<= ULTIMATE.start_main_~j~0 138) (<= 138 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 180) (<= ULTIMATE.start_main_~i~0 90) (<= 180 ULTIMATE.start_main_~j~0) (<= 90 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 142) (<= 71 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 71) (<= 142 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 37) (<= 74 ULTIMATE.start_main_~j~0) (<= 37 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 74)) (and (<= 54 ULTIMATE.start_main_~i~0) (<= 108 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 108) (<= ULTIMATE.start_main_~i~0 54)) (and (<= ULTIMATE.start_main_~j~0 22) (<= ULTIMATE.start_main_~i~0 11) (<= 11 ULTIMATE.start_main_~i~0) (<= 22 ULTIMATE.start_main_~j~0)) (and (<= 102 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 51) (<= ULTIMATE.start_main_~j~0 102) (<= 51 ULTIMATE.start_main_~i~0)) (and (<= 45 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 45) (<= ULTIMATE.start_main_~j~0 90) (<= 90 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 12) (<= ULTIMATE.start_main_~i~0 6) (<= 6 ULTIMATE.start_main_~i~0) (<= 12 ULTIMATE.start_main_~j~0)) (and (<= 13 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 26) (<= 26 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 13)) (and (<= 190 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 95) (<= ULTIMATE.start_main_~j~0 190) (<= 95 ULTIMATE.start_main_~i~0)) (and (<= 99 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 99) (<= ULTIMATE.start_main_~j~0 198) (<= 198 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 34) (<= 34 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 17) (<= 17 ULTIMATE.start_main_~i~0)) (and (<= 122 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 61) (<= ULTIMATE.start_main_~j~0 122) (<= 61 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 4) (<= 2 ULTIMATE.start_main_~i~0) (<= 4 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 2)) (and (<= ULTIMATE.start_main_~i~0 21) (<= 42 ULTIMATE.start_main_~j~0) (<= 21 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 42)) (and (<= ULTIMATE.start_main_~i~0 27) (<= ULTIMATE.start_main_~j~0 54) (<= 54 ULTIMATE.start_main_~j~0) (<= 27 ULTIMATE.start_main_~i~0)) (and (<= 70 ULTIMATE.start_main_~j~0) (<= 35 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 35) (<= ULTIMATE.start_main_~j~0 70)) (and (<= 32 ULTIMATE.start_main_~i~0) (<= 64 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 32) (<= ULTIMATE.start_main_~j~0 64)) (and (<= 49 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 49) (<= ULTIMATE.start_main_~j~0 98) (<= 98 ULTIMATE.start_main_~j~0)) (and (<= 36 ULTIMATE.start_main_~j~0) (<= 18 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 36) (<= ULTIMATE.start_main_~i~0 18)) (and (<= ULTIMATE.start_main_~j~0 120) (<= 60 ULTIMATE.start_main_~i~0) (<= 120 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 60)) (and (<= 38 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 19) (<= ULTIMATE.start_main_~j~0 38) (<= 19 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 60) (<= 60 ULTIMATE.start_main_~j~0) (<= 30 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 30)) (and (<= ULTIMATE.start_main_~j~0 194) (<= ULTIMATE.start_main_~i~0 97) (<= 194 ULTIMATE.start_main_~j~0) (<= 97 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 38) (<= ULTIMATE.start_main_~j~0 76) (<= 38 ULTIMATE.start_main_~i~0) (<= 76 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 14) (<= 7 ULTIMATE.start_main_~i~0) (<= 14 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 7)) (and (<= ULTIMATE.start_main_~i~0 80) (<= ULTIMATE.start_main_~j~0 160) (<= 80 ULTIMATE.start_main_~i~0) (<= 160 ULTIMATE.start_main_~j~0)) (and (<= 56 ULTIMATE.start_main_~i~0) (<= 112 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 56) (<= ULTIMATE.start_main_~j~0 112)) (and (<= ULTIMATE.start_main_~j~0 152) (<= 152 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 76) (<= 76 ULTIMATE.start_main_~i~0)) (and (<= 20 ULTIMATE.start_main_~i~0) (<= 40 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 40) (<= ULTIMATE.start_main_~i~0 20)) (and (<= ULTIMATE.start_main_~i~0 53) (<= 53 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 106) (<= 106 ULTIMATE.start_main_~j~0)) (and (<= 124 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 62) (<= 62 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 124)) (and (<= 18 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 18) (<= ULTIMATE.start_main_~i~0 9) (<= 9 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 188) (<= 188 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 94) (<= 94 ULTIMATE.start_main_~i~0)) (and (<= 33 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 33) (<= 66 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 66)) (and (<= ULTIMATE.start_main_~j~0 8) (<= 8 ULTIMATE.start_main_~j~0) (<= 4 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 4)) (and (<= ULTIMATE.start_main_~i~0 41) (<= ULTIMATE.start_main_~j~0 82) (<= 82 ULTIMATE.start_main_~j~0) (<= 41 ULTIMATE.start_main_~i~0)) (and (<= 134 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 134) (<= 67 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 67)) (and (<= ULTIMATE.start_main_~j~0 44) (<= ULTIMATE.start_main_~i~0 22) (<= 22 ULTIMATE.start_main_~i~0) (<= 44 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 58) (<= 116 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 116) (<= 58 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 39) (<= ULTIMATE.start_main_~j~0 78) (<= 78 ULTIMATE.start_main_~j~0) (<= 39 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 72) (<= 72 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 36) (<= 36 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 192) (<= 96 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 96) (<= 192 ULTIMATE.start_main_~j~0)) (and (<= 0 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 0) (= ULTIMATE.start_main_~j~0 0)) (and (<= ULTIMATE.start_main_~j~0 96) (<= 96 ULTIMATE.start_main_~j~0) (<= 48 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 48)) (and (<= ULTIMATE.start_main_~j~0 174) (<= ULTIMATE.start_main_~i~0 87) (<= 174 ULTIMATE.start_main_~j~0) (<= 87 ULTIMATE.start_main_~i~0)) (and (<= 44 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 44) (<= ULTIMATE.start_main_~j~0 88) (<= 88 ULTIMATE.start_main_~j~0))) [2020-11-29 22:56:20,758 INFO L274 CegarLoopResult]: For program point L23-3(lines 23 26) no Hoare annotation was computed. [2020-11-29 22:56:20,759 INFO L274 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-11-29 22:56:20,759 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-29 22:56:20,759 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-11-29 22:56:20,759 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 22:56:20,759 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 22:56:20,759 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 22:56:20,759 INFO L277 CegarLoopResult]: At program point L28(lines 19 29) the Hoare annotation is: true [2020-11-29 22:56:20,759 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2020-11-29 22:56:20,759 INFO L274 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-11-29 22:56:20,759 INFO L274 CegarLoopResult]: For program point L14(lines 14 18) no Hoare annotation was computed. [2020-11-29 22:56:20,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:56:20 BoogieIcfgContainer [2020-11-29 22:56:20,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:56:20,826 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:56:20,834 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:56:20,835 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:56:20,835 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:51:30" (3/4) ... [2020-11-29 22:56:20,839 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 22:56:20,850 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-29 22:56:20,850 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 22:56:20,851 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:56:20,851 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:56:20,910 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d1d9eca2-38c1-482a-87e7-387e2b5c1a00/bin/uautomizer/witness.graphml [2020-11-29 22:56:20,911 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:56:20,912 INFO L168 Benchmark]: Toolchain (without parser) took 291403.62 ms. Allocated memory was 98.6 MB in the beginning and 436.2 MB in the end (delta: 337.6 MB). Free memory was 66.0 MB in the beginning and 260.8 MB in the end (delta: -194.8 MB). Peak memory consumption was 142.8 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:20,912 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 79.7 MB. Free memory was 59.9 MB in the beginning and 59.9 MB in the end (delta: 30.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:56:20,913 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.42 ms. Allocated memory is still 98.6 MB. Free memory was 65.8 MB in the beginning and 75.7 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:20,913 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.20 ms. Allocated memory is still 98.6 MB. Free memory was 75.7 MB in the beginning and 74.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:20,914 INFO L168 Benchmark]: Boogie Preprocessor took 21.19 ms. Allocated memory is still 98.6 MB. Free memory was 74.4 MB in the beginning and 73.5 MB in the end (delta: 876.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:56:20,914 INFO L168 Benchmark]: RCFGBuilder took 388.03 ms. Allocated memory is still 98.6 MB. Free memory was 73.5 MB in the beginning and 62.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:20,915 INFO L168 Benchmark]: TraceAbstraction took 290613.40 ms. Allocated memory was 98.6 MB in the beginning and 436.2 MB in the end (delta: 337.6 MB). Free memory was 62.3 MB in the beginning and 263.9 MB in the end (delta: -201.7 MB). Peak memory consumption was 251.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:20,915 INFO L168 Benchmark]: Witness Printer took 84.80 ms. Allocated memory is still 436.2 MB. Free memory was 263.9 MB in the beginning and 260.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:20,918 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 79.7 MB. Free memory was 59.9 MB in the beginning and 59.9 MB in the end (delta: 30.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 256.42 ms. Allocated memory is still 98.6 MB. Free memory was 65.8 MB in the beginning and 75.7 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.20 ms. Allocated memory is still 98.6 MB. Free memory was 75.7 MB in the beginning and 74.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.19 ms. Allocated memory is still 98.6 MB. Free memory was 74.4 MB in the beginning and 73.5 MB in the end (delta: 876.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 388.03 ms. Allocated memory is still 98.6 MB. Free memory was 73.5 MB in the beginning and 62.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 290613.40 ms. Allocated memory was 98.6 MB in the beginning and 436.2 MB in the end (delta: 337.6 MB). Free memory was 62.3 MB in the beginning and 263.9 MB in the end (delta: -201.7 MB). Peak memory consumption was 251.2 MB. Max. memory is 16.1 GB. * Witness Printer took 84.80 ms. Allocated memory is still 436.2 MB. Free memory was 263.9 MB in the beginning and 260.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((59 <= i && j <= 118) && 118 <= j) && i <= 59) || (((23 <= i && j <= 46) && 46 <= j) && i <= 23)) || (((63 <= i && j <= 126) && i <= 63) && 126 <= j)) || (((176 <= j && i <= 88) && j <= 176) && 88 <= i)) || (((i <= 82 && 164 <= j) && 82 <= i) && j <= 164)) || (((i <= 3 && 6 <= j) && 3 <= i) && j <= 6)) || (((j <= 144 && 72 <= i) && 144 <= j) && i <= 72)) || (((156 <= j && i <= 78) && j <= 156) && 78 <= i)) || (((i <= 92 && 184 <= j) && j <= 184) && 92 <= i)) || (((68 <= i && i <= 68) && j <= 136) && 136 <= j)) || (((43 <= i && j <= 86) && i <= 43) && 86 <= j)) || (((j <= 148 && 148 <= j) && i <= 74) && 74 <= i)) || (((j <= 94 && 94 <= j) && i <= 47) && 47 <= i)) || (((j <= 58 && i <= 29) && 29 <= i) && 58 <= j)) || (((186 <= j && i <= 93) && 93 <= i) && j <= 186)) || (((j <= 128 && i <= 64) && 64 <= i) && 128 <= j)) || (((j <= 30 && i <= 15) && 15 <= i) && 30 <= j)) || (((178 <= j && i <= 89) && 89 <= i) && j <= 178)) || (((46 <= i && i <= 46) && 92 <= j) && j <= 92)) || (((i <= 16 && 16 <= i) && j <= 32) && 32 <= j)) || (((i <= 70 && 70 <= i) && j <= 140) && 140 <= j)) || (((i <= 52 && 52 <= i) && 104 <= j) && j <= 104)) || (((i <= 26 && j <= 52) && 26 <= i) && 52 <= j)) || (((28 <= j && i <= 14) && 14 <= i) && j <= 28)) || (((12 <= i && j <= 24) && i <= 12) && 24 <= j)) || (((20 <= j && 10 <= i) && i <= 10) && j <= 20)) || (((85 <= i && i <= 85) && j <= 170) && 170 <= j)) || (((79 <= i && j <= 158) && 158 <= j) && i <= 79)) || (((j <= 100 && 50 <= i) && i <= 50) && 100 <= j)) || (((84 <= j && i <= 42) && 42 <= i) && j <= 84)) || (((154 <= j && i <= 77) && 77 <= i) && j <= 154)) || (((172 <= j && j <= 172) && i <= 86) && 86 <= i)) || (((i <= 28 && 56 <= j) && 28 <= i) && j <= 56)) || (((i <= 75 && 150 <= j) && j <= 150) && 75 <= i)) || (((114 <= j && i <= 57) && 57 <= i) && j <= 114)) || (((84 <= i && j <= 168) && 168 <= j) && i <= 84)) || (((i <= 5 && j <= 10) && 5 <= i) && 10 <= j)) || (((91 <= i && i <= 91) && j <= 182) && 182 <= j)) || (((i <= 55 && 110 <= j) && j <= 110) && 55 <= i)) || (((j <= 68 && 68 <= j) && i <= 34) && 34 <= i)) || (((i <= 98 && 98 <= i) && j <= 196) && 196 <= j)) || (((i <= 66 && 132 <= j) && 66 <= i) && j <= 132)) || (((62 <= j && i <= 31) && j <= 62) && 31 <= i)) || (((25 <= i && i <= 25) && 50 <= j) && j <= 50)) || (((j <= 130 && 65 <= i) && 130 <= j) && i <= 65)) || (((i <= 83 && j <= 166) && 166 <= j) && 83 <= i)) || ((199 < j && 100 <= i) && j <= 200)) || (((j <= 146 && i <= 73) && 73 <= i) && 146 <= j)) || (((80 <= j && i <= 40) && 40 <= i) && j <= 80)) || (((j <= 2 && 2 <= j) && i <= 1) && 1 <= i)) || (((16 <= j && j <= 16) && 8 <= i) && i <= 8)) || (((i <= 24 && j <= 48) && 48 <= j) && 24 <= i)) || (((162 <= j && 81 <= i) && i <= 81) && j <= 162)) || (((69 <= i && i <= 69) && j <= 138) && 138 <= j)) || (((j <= 180 && i <= 90) && 180 <= j) && 90 <= i)) || (((j <= 142 && 71 <= i) && i <= 71) && 142 <= j)) || (((i <= 37 && 74 <= j) && 37 <= i) && j <= 74)) || (((54 <= i && 108 <= j) && j <= 108) && i <= 54)) || (((j <= 22 && i <= 11) && 11 <= i) && 22 <= j)) || (((102 <= j && i <= 51) && j <= 102) && 51 <= i)) || (((45 <= i && i <= 45) && j <= 90) && 90 <= j)) || (((j <= 12 && i <= 6) && 6 <= i) && 12 <= j)) || (((13 <= i && j <= 26) && 26 <= j) && i <= 13)) || (((190 <= j && i <= 95) && j <= 190) && 95 <= i)) || (((99 <= i && i <= 99) && j <= 198) && 198 <= j)) || (((j <= 34 && 34 <= j) && i <= 17) && 17 <= i)) || (((122 <= j && i <= 61) && j <= 122) && 61 <= i)) || (((j <= 4 && 2 <= i) && 4 <= j) && i <= 2)) || (((i <= 21 && 42 <= j) && 21 <= i) && j <= 42)) || (((i <= 27 && j <= 54) && 54 <= j) && 27 <= i)) || (((70 <= j && 35 <= i) && i <= 35) && j <= 70)) || (((32 <= i && 64 <= j) && i <= 32) && j <= 64)) || (((49 <= i && i <= 49) && j <= 98) && 98 <= j)) || (((36 <= j && 18 <= i) && j <= 36) && i <= 18)) || (((j <= 120 && 60 <= i) && 120 <= j) && i <= 60)) || (((38 <= j && i <= 19) && j <= 38) && 19 <= i)) || (((j <= 60 && 60 <= j) && 30 <= i) && i <= 30)) || (((j <= 194 && i <= 97) && 194 <= j) && 97 <= i)) || (((i <= 38 && j <= 76) && 38 <= i) && 76 <= j)) || (((j <= 14 && 7 <= i) && 14 <= j) && i <= 7)) || (((i <= 80 && j <= 160) && 80 <= i) && 160 <= j)) || (((56 <= i && 112 <= j) && i <= 56) && j <= 112)) || (((j <= 152 && 152 <= j) && i <= 76) && 76 <= i)) || (((20 <= i && 40 <= j) && j <= 40) && i <= 20)) || (((i <= 53 && 53 <= i) && j <= 106) && 106 <= j)) || (((124 <= j && i <= 62) && 62 <= i) && j <= 124)) || (((18 <= j && j <= 18) && i <= 9) && 9 <= i)) || (((j <= 188 && 188 <= j) && i <= 94) && 94 <= i)) || (((33 <= i && i <= 33) && 66 <= j) && j <= 66)) || (((j <= 8 && 8 <= j) && 4 <= i) && i <= 4)) || (((i <= 41 && j <= 82) && 82 <= j) && 41 <= i)) || (((134 <= j && j <= 134) && 67 <= i) && i <= 67)) || (((j <= 44 && i <= 22) && 22 <= i) && 44 <= j)) || (((i <= 58 && 116 <= j) && j <= 116) && 58 <= i)) || (((i <= 39 && j <= 78) && 78 <= j) && 39 <= i)) || (((j <= 72 && 72 <= j) && i <= 36) && 36 <= i)) || (((j <= 192 && 96 <= i) && i <= 96) && 192 <= j)) || ((0 <= i && i <= 0) && j == 0)) || (((j <= 96 && 96 <= j) && 48 <= i) && i <= 48)) || (((j <= 174 && i <= 87) && 174 <= j) && 87 <= i)) || (((44 <= i && i <= 44) && j <= 88) && 88 <= j) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 287.3s, OverallIterations: 103, TraceHistogramMax: 101, AutomataDifference: 24.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 824 SDtfs, 1 SDslu, 18709 SDs, 0 SdLazy, 23371 SolverSat, 156 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11210 GetRequests, 5953 SyntacticMatches, 2 SemanticMatches, 5255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 224.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 103 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 104 NumberOfFragments, 1309 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1.6s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 231.1s InterpolantComputationTime, 11825 NumberOfCodeBlocks, 11825 NumberOfCodeBlocksAsserted, 1495 NumberOfCheckSat, 11622 ConstructedInterpolants, 0 QuantifiedInterpolants, 2466711 SizeOfPredicates, 102 NumberOfNonLiveVariables, 29850 ConjunctsInSsa, 5353 ConjunctsInUnsatCore, 203 InterpolantComputations, 3 PerfectInterpolantSequences, 5151/348551 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...