./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007.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_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 05ff204c30e7b81bf33f8a8c483906be16c1e587 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:27:51,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:27:51,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:27:51,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:27:51,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:27:51,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:27:51,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:27:51,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:27:51,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:27:51,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:27:51,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:27:51,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:27:51,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:27:51,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:27:51,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:27:51,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:27:51,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:27:51,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:27:51,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:27:51,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:27:51,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:27:51,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:27:51,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:27:51,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:27:51,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:27:51,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:27:51,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:27:51,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:27:51,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:27:51,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:27:51,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:27:51,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:27:51,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:27:51,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:27:51,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:27:51,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:27:51,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:27:51,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:27:51,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:27:51,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:27:51,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:27:51,260 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:27:51,297 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:27:51,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:27:51,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:27:51,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:27:51,301 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:27:51,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:27:51,302 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:27:51,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:27:51,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:27:51,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:27:51,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:27:51,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:27:51,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:27:51,304 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:27:51,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:27:51,304 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:27:51,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:27:51,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:27:51,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:27:51,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:27:51,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:27:51,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:27:51,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:27:51,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:27:51,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:27:51,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:27:51,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:27:51,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:27:51,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:27:51,308 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_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05ff204c30e7b81bf33f8a8c483906be16c1e587 [2020-11-30 01:27:51,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:27:51,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:27:51,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:27:51,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:27:51,674 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:27:51,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer/../../sv-benchmarks/c/loop-lit/gj2007.i [2020-11-30 01:27:51,782 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer/data/924c26bd2/bbd5865ad6744515a1151b0e910e11ec/FLAGcee9319b8 [2020-11-30 01:27:52,401 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:27:52,402 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/sv-benchmarks/c/loop-lit/gj2007.i [2020-11-30 01:27:52,411 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer/data/924c26bd2/bbd5865ad6744515a1151b0e910e11ec/FLAGcee9319b8 [2020-11-30 01:27:52,768 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer/data/924c26bd2/bbd5865ad6744515a1151b0e910e11ec [2020-11-30 01:27:52,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:27:52,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:27:52,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:27:52,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:27:52,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:27:52,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:27:52" (1/1) ... [2020-11-30 01:27:52,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@593d9a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:52, skipping insertion in model container [2020-11-30 01:27:52,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:27:52" (1/1) ... [2020-11-30 01:27:52,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:27:52,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:27:53,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:27:53,077 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:27:53,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:27:53,127 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:27:53,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53 WrapperNode [2020-11-30 01:27:53,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:27:53,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:27:53,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:27:53,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:27:53,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53" (1/1) ... [2020-11-30 01:27:53,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53" (1/1) ... [2020-11-30 01:27:53,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:27:53,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:27:53,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:27:53,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:27:53,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53" (1/1) ... [2020-11-30 01:27:53,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53" (1/1) ... [2020-11-30 01:27:53,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53" (1/1) ... [2020-11-30 01:27:53,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53" (1/1) ... [2020-11-30 01:27:53,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53" (1/1) ... [2020-11-30 01:27:53,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53" (1/1) ... [2020-11-30 01:27:53,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53" (1/1) ... [2020-11-30 01:27:53,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:27:53,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:27:53,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:27:53,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:27:53,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:27:53,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:27:53,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:27:53,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:27:53,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:27:53,756 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:27:53,756 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 01:27:53,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:27:53 BoogieIcfgContainer [2020-11-30 01:27:53,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:27:53,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:27:53,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:27:53,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:27:53,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:27:52" (1/3) ... [2020-11-30 01:27:53,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7940e24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:27:53, skipping insertion in model container [2020-11-30 01:27:53,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:53" (2/3) ... [2020-11-30 01:27:53,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7940e24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:27:53, skipping insertion in model container [2020-11-30 01:27:53,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:27:53" (3/3) ... [2020-11-30 01:27:53,781 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.i [2020-11-30 01:27:53,795 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:27:53,801 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:27:53,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:27:53,857 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:27:53,857 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:27:53,857 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:27:53,857 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:27:53,858 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:27:53,858 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:27:53,858 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:27:53,858 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:27:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-30 01:27:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:27:53,888 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:53,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:53,890 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:53,899 INFO L82 PathProgramCache]: Analyzing trace with hash 531641672, now seen corresponding path program 1 times [2020-11-30 01:27:53,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:53,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312703821] [2020-11-30 01:27:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:54,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312703821] [2020-11-30 01:27:54,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:27:54,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:27:54,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129654490] [2020-11-30 01:27:54,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:27:54,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:54,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:27:54,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:27:54,133 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-30 01:27:54,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:54,158 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-11-30 01:27:54,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:27:54,161 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-30 01:27:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:54,174 INFO L225 Difference]: With dead ends: 25 [2020-11-30 01:27:54,174 INFO L226 Difference]: Without dead ends: 10 [2020-11-30 01:27:54,179 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 [2020-11-30 01:27:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-30 01:27:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-30 01:27:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 01:27:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-30 01:27:54,269 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2020-11-30 01:27:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:54,270 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-30 01:27:54,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:27:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-30 01:27:54,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:27:54,271 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:54,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:54,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:27:54,272 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:54,273 INFO L82 PathProgramCache]: Analyzing trace with hash 245350162, now seen corresponding path program 1 times [2020-11-30 01:27:54,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:54,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742671922] [2020-11-30 01:27:54,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:54,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742671922] [2020-11-30 01:27:54,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:27:54,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:27:54,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289605686] [2020-11-30 01:27:54,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:27:54,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:54,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:27:54,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:27:54,371 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-11-30 01:27:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:54,459 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-11-30 01:27:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:27:54,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-30 01:27:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:54,462 INFO L225 Difference]: With dead ends: 20 [2020-11-30 01:27:54,462 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 01:27:54,463 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 [2020-11-30 01:27:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 01:27:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-30 01:27:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 01:27:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-30 01:27:54,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-11-30 01:27:54,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:54,471 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-30 01:27:54,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:27:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-30 01:27:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:27:54,473 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:54,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:54,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:27:54,475 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:54,477 INFO L82 PathProgramCache]: Analyzing trace with hash 692098421, now seen corresponding path program 1 times [2020-11-30 01:27:54,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:54,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893976102] [2020-11-30 01:27:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:54,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893976102] [2020-11-30 01:27:54,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510470113] [2020-11-30 01:27:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:27:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:54,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:27:54,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:54,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:27:54,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-30 01:27:54,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401353307] [2020-11-30 01:27:54,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:27:54,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:54,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:27:54,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:27:54,765 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-11-30 01:27:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:54,813 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-11-30 01:27:54,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:27:54,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 01:27:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:54,815 INFO L225 Difference]: With dead ends: 22 [2020-11-30 01:27:54,816 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 01:27:54,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:27:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 01:27:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-30 01:27:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 01:27:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-30 01:27:54,823 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-11-30 01:27:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:54,824 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-30 01:27:54,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:27:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-30 01:27:54,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:27:54,825 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:54,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:55,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 01:27:55,049 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:55,050 INFO L82 PathProgramCache]: Analyzing trace with hash 520445720, now seen corresponding path program 2 times [2020-11-30 01:27:55,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:55,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891546191] [2020-11-30 01:27:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:27:55,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891546191] [2020-11-30 01:27:55,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:27:55,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:27:55,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234200224] [2020-11-30 01:27:55,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:27:55,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:55,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:27:55,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:27:55,113 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-11-30 01:27:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:55,136 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-11-30 01:27:55,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:27:55,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-30 01:27:55,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:55,139 INFO L225 Difference]: With dead ends: 22 [2020-11-30 01:27:55,139 INFO L226 Difference]: Without dead ends: 16 [2020-11-30 01:27:55,140 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 [2020-11-30 01:27:55,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-30 01:27:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-11-30 01:27:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 01:27:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-30 01:27:55,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-11-30 01:27:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:55,147 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-30 01:27:55,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:27:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-30 01:27:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:27:55,149 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:55,149 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:55,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:27:55,150 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:55,153 INFO L82 PathProgramCache]: Analyzing trace with hash 545964669, now seen corresponding path program 1 times [2020-11-30 01:27:55,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:55,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626358547] [2020-11-30 01:27:55,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:55,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626358547] [2020-11-30 01:27:55,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544033629] [2020-11-30 01:27:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:27:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:55,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:27:55,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:55,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:27:55,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-30 01:27:55,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89073541] [2020-11-30 01:27:55,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:27:55,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:55,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:27:55,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:27:55,420 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-11-30 01:27:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:55,472 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-30 01:27:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:27:55,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-30 01:27:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:55,476 INFO L225 Difference]: With dead ends: 26 [2020-11-30 01:27:55,476 INFO L226 Difference]: Without dead ends: 17 [2020-11-30 01:27:55,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:27:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-30 01:27:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-30 01:27:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 01:27:55,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-30 01:27:55,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-11-30 01:27:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:55,483 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-30 01:27:55,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:27:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-30 01:27:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:27:55,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:55,484 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:55,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:55,708 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:55,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:55,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1380187488, now seen corresponding path program 2 times [2020-11-30 01:27:55,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:55,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275201243] [2020-11-30 01:27:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:55,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275201243] [2020-11-30 01:27:55,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822532314] [2020-11-30 01:27:55,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:27:55,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:27:55,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:55,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:27:55,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:55,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:27:55,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-30 01:27:55,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961632211] [2020-11-30 01:27:55,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:27:55,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:55,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:27:55,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:27:55,958 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2020-11-30 01:27:56,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:56,012 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-11-30 01:27:56,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:27:56,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-11-30 01:27:56,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:56,015 INFO L225 Difference]: With dead ends: 28 [2020-11-30 01:27:56,015 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 01:27:56,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:27:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 01:27:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-30 01:27:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 01:27:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-11-30 01:27:56,020 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-11-30 01:27:56,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:56,022 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-11-30 01:27:56,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:27:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-11-30 01:27:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:27:56,024 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:56,024 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:56,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:56,225 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:56,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:56,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1281505789, now seen corresponding path program 3 times [2020-11-30 01:27:56,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:56,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094710017] [2020-11-30 01:27:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:56,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094710017] [2020-11-30 01:27:56,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726754788] [2020-11-30 01:27:56,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:27:56,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 01:27:56,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:56,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:27:56,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-30 01:27:56,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:27:56,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2020-11-30 01:27:56,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794660729] [2020-11-30 01:27:56,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:27:56,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:56,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:27:56,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:27:56,571 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 9 states. [2020-11-30 01:27:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:56,729 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-11-30 01:27:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:27:56,730 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-11-30 01:27:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:56,733 INFO L225 Difference]: With dead ends: 33 [2020-11-30 01:27:56,733 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 01:27:56,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:27:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 01:27:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-11-30 01:27:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 01:27:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-30 01:27:56,739 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-11-30 01:27:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:56,740 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-30 01:27:56,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:27:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-30 01:27:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:27:56,744 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:56,745 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:56,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:56,961 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:56,961 INFO L82 PathProgramCache]: Analyzing trace with hash -547326837, now seen corresponding path program 4 times [2020-11-30 01:27:56,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:56,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865050981] [2020-11-30 01:27:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:27:57,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865050981] [2020-11-30 01:27:57,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876666324] [2020-11-30 01:27:57,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:27:57,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:27:57,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:27:57,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:27:57,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:27:57,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-30 01:27:57,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192390951] [2020-11-30 01:27:57,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:27:57,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:27:57,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:27:57,261 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2020-11-30 01:27:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:57,324 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-11-30 01:27:57,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:27:57,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-11-30 01:27:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:57,326 INFO L225 Difference]: With dead ends: 36 [2020-11-30 01:27:57,326 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 01:27:57,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:27:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 01:27:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-30 01:27:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 01:27:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-30 01:27:57,333 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-11-30 01:27:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:57,334 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-30 01:27:57,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:27:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-30 01:27:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:27:57,335 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:57,335 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:57,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:57,560 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash 212656558, now seen corresponding path program 5 times [2020-11-30 01:27:57,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:57,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428648721] [2020-11-30 01:27:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:27:57,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428648721] [2020-11-30 01:27:57,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177957847] [2020-11-30 01:27:57,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:27:57,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-30 01:27:57,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:57,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:27:57,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:27:57,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:27:57,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-30 01:27:57,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139119189] [2020-11-30 01:27:57,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:27:57,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:27:57,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:27:57,870 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2020-11-30 01:27:57,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:57,928 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-11-30 01:27:57,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:27:57,929 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-11-30 01:27:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:57,930 INFO L225 Difference]: With dead ends: 38 [2020-11-30 01:27:57,930 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:27:57,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:27:57,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:27:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 01:27:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:27:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-11-30 01:27:57,936 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-11-30 01:27:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:57,937 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-11-30 01:27:57,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:27:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-11-30 01:27:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 01:27:57,938 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:57,938 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:58,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:58,161 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:58,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:58,162 INFO L82 PathProgramCache]: Analyzing trace with hash 412258833, now seen corresponding path program 6 times [2020-11-30 01:27:58,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:58,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56720183] [2020-11-30 01:27:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:27:58,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56720183] [2020-11-30 01:27:58,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732548332] [2020-11-30 01:27:58,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:27:58,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-30 01:27:58,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:27:58,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:58,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:27:58,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2020-11-30 01:27:58,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404227137] [2020-11-30 01:27:58,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:27:58,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:58,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:27:58,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:27:58,517 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 13 states. [2020-11-30 01:27:58,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:58,617 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-11-30 01:27:58,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:27:58,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-11-30 01:27:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:58,618 INFO L225 Difference]: With dead ends: 44 [2020-11-30 01:27:58,618 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 01:27:58,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:27:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 01:27:58,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-30 01:27:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 01:27:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-30 01:27:58,625 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2020-11-30 01:27:58,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:58,626 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-30 01:27:58,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:27:58,626 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-30 01:27:58,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-30 01:27:58,627 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:58,627 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:58,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-30 01:27:58,841 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:58,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1833363782, now seen corresponding path program 7 times [2020-11-30 01:27:58,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:58,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536217290] [2020-11-30 01:27:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:27:59,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536217290] [2020-11-30 01:27:59,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621291265] [2020-11-30 01:27:59,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:27:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:59,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:27:59,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:27:59,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:27:59,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-30 01:27:59,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521842028] [2020-11-30 01:27:59,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:27:59,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:59,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:27:59,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:27:59,161 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 14 states. [2020-11-30 01:27:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:59,264 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-11-30 01:27:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:27:59,265 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-11-30 01:27:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:59,265 INFO L225 Difference]: With dead ends: 46 [2020-11-30 01:27:59,265 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 01:27:59,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:27:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 01:27:59,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-30 01:27:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 01:27:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-11-30 01:27:59,271 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-11-30 01:27:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:59,272 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-11-30 01:27:59,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:27:59,272 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-11-30 01:27:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-30 01:27:59,273 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:59,273 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:59,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-30 01:27:59,489 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:59,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1281733661, now seen corresponding path program 8 times [2020-11-30 01:27:59,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:59,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025420099] [2020-11-30 01:27:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:27:59,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025420099] [2020-11-30 01:27:59,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462510282] [2020-11-30 01:27:59,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:27:59,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:27:59,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 01:27:59,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:27:59,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:27:59,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-30 01:27:59,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240220421] [2020-11-30 01:27:59,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 01:27:59,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:59,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 01:27:59,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:27:59,897 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 15 states. [2020-11-30 01:27:59,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:59,993 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-11-30 01:27:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 01:27:59,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-11-30 01:27:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:59,997 INFO L225 Difference]: With dead ends: 48 [2020-11-30 01:27:59,997 INFO L226 Difference]: Without dead ends: 37 [2020-11-30 01:27:59,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:27:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-30 01:28:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-30 01:28:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-30 01:28:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-30 01:28:00,004 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-11-30 01:28:00,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:00,005 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-30 01:28:00,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 01:28:00,005 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-30 01:28:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-30 01:28:00,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:00,007 INFO L422 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:00,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:00,213 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:00,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:00,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1298171072, now seen corresponding path program 9 times [2020-11-30 01:28:00,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:00,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444139761] [2020-11-30 01:28:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:28:00,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444139761] [2020-11-30 01:28:00,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908766907] [2020-11-30 01:28:00,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:00,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-30 01:28:00,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:00,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:28:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-11-30 01:28:00,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:00,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2020-11-30 01:28:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232123586] [2020-11-30 01:28:00,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 01:28:00,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 01:28:00,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:28:00,668 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 18 states. [2020-11-30 01:28:00,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:00,775 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-11-30 01:28:00,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 01:28:00,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-11-30 01:28:00,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:00,777 INFO L225 Difference]: With dead ends: 53 [2020-11-30 01:28:00,777 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 01:28:00,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:28:00,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 01:28:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-11-30 01:28:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-30 01:28:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-11-30 01:28:00,783 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 36 [2020-11-30 01:28:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:00,783 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-11-30 01:28:00,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 01:28:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-11-30 01:28:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-30 01:28:00,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:00,784 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:00,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:00,985 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:00,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1799428792, now seen corresponding path program 10 times [2020-11-30 01:28:00,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:00,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927500559] [2020-11-30 01:28:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:28:01,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927500559] [2020-11-30 01:28:01,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974736474] [2020-11-30 01:28:01,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:01,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:28:01,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:01,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 01:28:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:28:01,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:01,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-30 01:28:01,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729422341] [2020-11-30 01:28:01,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 01:28:01,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:01,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 01:28:01,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:28:01,450 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 17 states. [2020-11-30 01:28:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:01,595 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-11-30 01:28:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 01:28:01,596 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-11-30 01:28:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:01,597 INFO L225 Difference]: With dead ends: 56 [2020-11-30 01:28:01,597 INFO L226 Difference]: Without dead ends: 43 [2020-11-30 01:28:01,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:28:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-30 01:28:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-11-30 01:28:01,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 01:28:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-11-30 01:28:01,614 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 40 [2020-11-30 01:28:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:01,616 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-11-30 01:28:01,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 01:28:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-11-30 01:28:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-30 01:28:01,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:01,618 INFO L422 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:01,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-30 01:28:01,834 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:01,835 INFO L82 PathProgramCache]: Analyzing trace with hash 821391275, now seen corresponding path program 11 times [2020-11-30 01:28:01,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:01,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719810247] [2020-11-30 01:28:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:28:02,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719810247] [2020-11-30 01:28:02,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540741428] [2020-11-30 01:28:02,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:02,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-30 01:28:02,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:02,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 01:28:02,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:28:02,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:02,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-30 01:28:02,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62927398] [2020-11-30 01:28:02,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 01:28:02,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:02,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 01:28:02,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:28:02,328 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 18 states. [2020-11-30 01:28:02,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:02,414 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-11-30 01:28:02,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 01:28:02,415 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-11-30 01:28:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:02,415 INFO L225 Difference]: With dead ends: 58 [2020-11-30 01:28:02,416 INFO L226 Difference]: Without dead ends: 45 [2020-11-30 01:28:02,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:28:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-30 01:28:02,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-30 01:28:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 01:28:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-11-30 01:28:02,427 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 42 [2020-11-30 01:28:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:02,428 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-11-30 01:28:02,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 01:28:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-11-30 01:28:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-30 01:28:02,429 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:02,430 INFO L422 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:02,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-30 01:28:02,653 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:02,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:02,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1716327090, now seen corresponding path program 12 times [2020-11-30 01:28:02,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:02,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543912374] [2020-11-30 01:28:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:28:03,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543912374] [2020-11-30 01:28:03,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977705268] [2020-11-30 01:28:03,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:03,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-11-30 01:28:03,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:28:03,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 105 proven. 9 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-11-30 01:28:03,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:03,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2020-11-30 01:28:03,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646142393] [2020-11-30 01:28:03,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-30 01:28:03,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:03,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-30 01:28:03,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:28:03,267 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 22 states. [2020-11-30 01:28:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:03,389 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-11-30 01:28:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-30 01:28:03,389 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2020-11-30 01:28:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:03,391 INFO L225 Difference]: With dead ends: 63 [2020-11-30 01:28:03,391 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 01:28:03,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:28:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 01:28:03,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-11-30 01:28:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-30 01:28:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-11-30 01:28:03,398 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 44 [2020-11-30 01:28:03,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:03,399 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-11-30 01:28:03,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-30 01:28:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-11-30 01:28:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-30 01:28:03,400 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:03,401 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:03,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-30 01:28:03,617 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:03,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1388154710, now seen corresponding path program 13 times [2020-11-30 01:28:03,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:03,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167260374] [2020-11-30 01:28:03,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-30 01:28:03,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167260374] [2020-11-30 01:28:03,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815519984] [2020-11-30 01:28:03,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:04,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 01:28:04,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-30 01:28:04,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:04,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-30 01:28:04,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725097204] [2020-11-30 01:28:04,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 01:28:04,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:04,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 01:28:04,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:28:04,107 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 20 states. [2020-11-30 01:28:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:04,228 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-11-30 01:28:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-30 01:28:04,229 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-11-30 01:28:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:04,229 INFO L225 Difference]: With dead ends: 66 [2020-11-30 01:28:04,230 INFO L226 Difference]: Without dead ends: 51 [2020-11-30 01:28:04,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:28:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-30 01:28:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-30 01:28:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-30 01:28:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-11-30 01:28:04,251 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 48 [2020-11-30 01:28:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:04,251 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-11-30 01:28:04,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 01:28:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-11-30 01:28:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-30 01:28:04,253 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:04,254 INFO L422 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:04,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:04,481 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1824454983, now seen corresponding path program 14 times [2020-11-30 01:28:04,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:04,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610608161] [2020-11-30 01:28:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-30 01:28:04,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610608161] [2020-11-30 01:28:04,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075911577] [2020-11-30 01:28:04,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:05,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:28:05,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:05,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-30 01:28:05,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-30 01:28:05,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:05,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-30 01:28:05,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141487647] [2020-11-30 01:28:05,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-30 01:28:05,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-30 01:28:05,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-30 01:28:05,151 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 21 states. [2020-11-30 01:28:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:05,283 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-11-30 01:28:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 01:28:05,285 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-11-30 01:28:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:05,286 INFO L225 Difference]: With dead ends: 68 [2020-11-30 01:28:05,286 INFO L226 Difference]: Without dead ends: 53 [2020-11-30 01:28:05,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-30 01:28:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-30 01:28:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-30 01:28:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-30 01:28:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-11-30 01:28:05,303 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 50 [2020-11-30 01:28:05,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:05,303 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-11-30 01:28:05,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-30 01:28:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-11-30 01:28:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-30 01:28:05,310 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:05,312 INFO L422 BasicCegarLoop]: trace histogram [22, 18, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:05,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-30 01:28:05,529 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:05,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1060884132, now seen corresponding path program 15 times [2020-11-30 01:28:05,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:05,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446277948] [2020-11-30 01:28:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-30 01:28:06,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446277948] [2020-11-30 01:28:06,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518322627] [2020-11-30 01:28:06,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:06,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-30 01:28:06,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:06,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:28:06,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 162 proven. 16 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-11-30 01:28:06,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:06,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7] total 26 [2020-11-30 01:28:06,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251725167] [2020-11-30 01:28:06,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-30 01:28:06,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:06,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-30 01:28:06,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:28:06,309 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 26 states. [2020-11-30 01:28:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:06,510 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-11-30 01:28:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-30 01:28:06,511 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2020-11-30 01:28:06,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:06,512 INFO L225 Difference]: With dead ends: 73 [2020-11-30 01:28:06,512 INFO L226 Difference]: Without dead ends: 58 [2020-11-30 01:28:06,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:28:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-30 01:28:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-11-30 01:28:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-30 01:28:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-11-30 01:28:06,519 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 52 [2020-11-30 01:28:06,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:06,520 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-11-30 01:28:06,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-30 01:28:06,520 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-11-30 01:28:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-30 01:28:06,522 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:06,522 INFO L422 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:06,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:06,737 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:06,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1521824996, now seen corresponding path program 16 times [2020-11-30 01:28:06,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:06,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537823941] [2020-11-30 01:28:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-30 01:28:07,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537823941] [2020-11-30 01:28:07,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963351683] [2020-11-30 01:28:07,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:07,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:28:07,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:07,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-30 01:28:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-30 01:28:07,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:07,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-30 01:28:07,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494570039] [2020-11-30 01:28:07,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-30 01:28:07,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:07,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-30 01:28:07,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-30 01:28:07,359 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 23 states. [2020-11-30 01:28:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:07,474 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2020-11-30 01:28:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-30 01:28:07,475 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-11-30 01:28:07,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:07,475 INFO L225 Difference]: With dead ends: 76 [2020-11-30 01:28:07,475 INFO L226 Difference]: Without dead ends: 59 [2020-11-30 01:28:07,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-30 01:28:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-30 01:28:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-30 01:28:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-30 01:28:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-11-30 01:28:07,483 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 56 [2020-11-30 01:28:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:07,484 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-11-30 01:28:07,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-30 01:28:07,484 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-11-30 01:28:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-30 01:28:07,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:07,485 INFO L422 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:07,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:07,701 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:07,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1907844793, now seen corresponding path program 17 times [2020-11-30 01:28:07,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:07,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495614687] [2020-11-30 01:28:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-30 01:28:08,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495614687] [2020-11-30 01:28:08,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267119764] [2020-11-30 01:28:08,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:08,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2020-11-30 01:28:08,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-30 01:28:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-30 01:28:08,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:08,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-30 01:28:08,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394759557] [2020-11-30 01:28:08,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-30 01:28:08,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:08,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-30 01:28:08,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-11-30 01:28:08,249 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 24 states. [2020-11-30 01:28:08,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:08,380 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-11-30 01:28:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-30 01:28:08,381 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-11-30 01:28:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:08,382 INFO L225 Difference]: With dead ends: 78 [2020-11-30 01:28:08,382 INFO L226 Difference]: Without dead ends: 61 [2020-11-30 01:28:08,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-11-30 01:28:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-30 01:28:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-11-30 01:28:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-30 01:28:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-11-30 01:28:08,389 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 58 [2020-11-30 01:28:08,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:08,389 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-11-30 01:28:08,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-30 01:28:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-11-30 01:28:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-30 01:28:08,391 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:08,391 INFO L422 BasicCegarLoop]: trace histogram [26, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:08,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-30 01:28:08,592 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:08,592 INFO L82 PathProgramCache]: Analyzing trace with hash 714371306, now seen corresponding path program 18 times [2020-11-30 01:28:08,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:08,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975759462] [2020-11-30 01:28:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 198 proven. 462 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-30 01:28:09,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975759462] [2020-11-30 01:28:09,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876233489] [2020-11-30 01:28:09,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:09,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-11-30 01:28:09,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:28:09,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 231 proven. 25 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-11-30 01:28:09,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:09,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2020-11-30 01:28:09,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634265498] [2020-11-30 01:28:09,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-30 01:28:09,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:09,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-30 01:28:09,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:28:09,391 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 30 states. [2020-11-30 01:28:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:09,570 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-11-30 01:28:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-30 01:28:09,574 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 60 [2020-11-30 01:28:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:09,575 INFO L225 Difference]: With dead ends: 83 [2020-11-30 01:28:09,575 INFO L226 Difference]: Without dead ends: 66 [2020-11-30 01:28:09,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:28:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-30 01:28:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-11-30 01:28:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-30 01:28:09,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-11-30 01:28:09,582 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 60 [2020-11-30 01:28:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:09,582 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-11-30 01:28:09,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-30 01:28:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-11-30 01:28:09,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-30 01:28:09,583 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:09,583 INFO L422 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:09,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:09,784 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:09,785 INFO L82 PathProgramCache]: Analyzing trace with hash -501352974, now seen corresponding path program 19 times [2020-11-30 01:28:09,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:09,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046938614] [2020-11-30 01:28:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-30 01:28:10,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046938614] [2020-11-30 01:28:10,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369557190] [2020-11-30 01:28:10,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:10,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 01:28:10,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-30 01:28:10,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:10,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-30 01:28:10,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370746029] [2020-11-30 01:28:10,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-30 01:28:10,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:10,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-30 01:28:10,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:28:10,373 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 26 states. [2020-11-30 01:28:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:10,538 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-11-30 01:28:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-30 01:28:10,538 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 64 [2020-11-30 01:28:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:10,539 INFO L225 Difference]: With dead ends: 86 [2020-11-30 01:28:10,539 INFO L226 Difference]: Without dead ends: 67 [2020-11-30 01:28:10,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:28:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-30 01:28:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-11-30 01:28:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-30 01:28:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-11-30 01:28:10,547 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 64 [2020-11-30 01:28:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:10,547 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-11-30 01:28:10,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-30 01:28:10,548 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-11-30 01:28:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-30 01:28:10,548 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:10,549 INFO L422 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:10,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-30 01:28:10,764 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:10,765 INFO L82 PathProgramCache]: Analyzing trace with hash -461093035, now seen corresponding path program 20 times [2020-11-30 01:28:10,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:10,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105296833] [2020-11-30 01:28:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-30 01:28:11,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105296833] [2020-11-30 01:28:11,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552093044] [2020-11-30 01:28:11,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:11,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:28:11,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:11,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-30 01:28:11,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-30 01:28:11,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:11,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-30 01:28:11,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511494447] [2020-11-30 01:28:11,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-30 01:28:11,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:11,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-30 01:28:11,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-11-30 01:28:11,415 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 27 states. [2020-11-30 01:28:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:11,597 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-11-30 01:28:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-30 01:28:11,598 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 66 [2020-11-30 01:28:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:11,599 INFO L225 Difference]: With dead ends: 88 [2020-11-30 01:28:11,599 INFO L226 Difference]: Without dead ends: 69 [2020-11-30 01:28:11,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-11-30 01:28:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-30 01:28:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-11-30 01:28:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-30 01:28:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-11-30 01:28:11,618 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 66 [2020-11-30 01:28:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:11,619 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-11-30 01:28:11,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-30 01:28:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-11-30 01:28:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-30 01:28:11,620 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:11,621 INFO L422 BasicCegarLoop]: trace histogram [30, 24, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:11,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-30 01:28:11,849 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:11,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:11,849 INFO L82 PathProgramCache]: Analyzing trace with hash -425997320, now seen corresponding path program 21 times [2020-11-30 01:28:11,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:11,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558921703] [2020-11-30 01:28:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 275 proven. 600 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-30 01:28:12,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558921703] [2020-11-30 01:28:12,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451190726] [2020-11-30 01:28:12,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:12,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-11-30 01:28:12,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:12,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:28:12,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 312 proven. 36 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-11-30 01:28:12,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:12,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2020-11-30 01:28:12,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117970669] [2020-11-30 01:28:12,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-30 01:28:12,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:12,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-30 01:28:12,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-11-30 01:28:12,838 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 34 states. [2020-11-30 01:28:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:13,118 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-11-30 01:28:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-30 01:28:13,119 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 68 [2020-11-30 01:28:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:13,120 INFO L225 Difference]: With dead ends: 93 [2020-11-30 01:28:13,120 INFO L226 Difference]: Without dead ends: 74 [2020-11-30 01:28:13,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-11-30 01:28:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-30 01:28:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-11-30 01:28:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-30 01:28:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2020-11-30 01:28:13,126 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 68 [2020-11-30 01:28:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:13,126 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2020-11-30 01:28:13,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-30 01:28:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2020-11-30 01:28:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-30 01:28:13,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:13,128 INFO L422 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:13,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:13,341 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:13,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:13,341 INFO L82 PathProgramCache]: Analyzing trace with hash -941100416, now seen corresponding path program 22 times [2020-11-30 01:28:13,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:13,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140672633] [2020-11-30 01:28:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-30 01:28:13,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140672633] [2020-11-30 01:28:13,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932183668] [2020-11-30 01:28:13,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:14,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:28:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:14,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-30 01:28:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-30 01:28:14,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:14,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-30 01:28:14,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721557388] [2020-11-30 01:28:14,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-30 01:28:14,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:14,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-30 01:28:14,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-11-30 01:28:14,145 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 29 states. [2020-11-30 01:28:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:14,328 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2020-11-30 01:28:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-30 01:28:14,329 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-11-30 01:28:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:14,330 INFO L225 Difference]: With dead ends: 96 [2020-11-30 01:28:14,330 INFO L226 Difference]: Without dead ends: 75 [2020-11-30 01:28:14,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-11-30 01:28:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-30 01:28:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-11-30 01:28:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-30 01:28:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-11-30 01:28:14,336 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 72 [2020-11-30 01:28:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:14,336 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-11-30 01:28:14,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-30 01:28:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-11-30 01:28:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-30 01:28:14,337 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:14,338 INFO L422 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:14,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-30 01:28:14,557 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash 31731939, now seen corresponding path program 23 times [2020-11-30 01:28:14,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:14,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241483375] [2020-11-30 01:28:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-30 01:28:15,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241483375] [2020-11-30 01:28:15,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705069438] [2020-11-30 01:28:15,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:15,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-11-30 01:28:15,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:15,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-30 01:28:15,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-30 01:28:15,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:15,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-30 01:28:15,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229605081] [2020-11-30 01:28:15,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-30 01:28:15,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:15,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-30 01:28:15,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:28:15,301 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 30 states. [2020-11-30 01:28:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:15,469 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2020-11-30 01:28:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-30 01:28:15,470 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-11-30 01:28:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:15,470 INFO L225 Difference]: With dead ends: 98 [2020-11-30 01:28:15,471 INFO L226 Difference]: Without dead ends: 77 [2020-11-30 01:28:15,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:28:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-30 01:28:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-11-30 01:28:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-30 01:28:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2020-11-30 01:28:15,476 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 74 [2020-11-30 01:28:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:15,477 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2020-11-30 01:28:15,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-30 01:28:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2020-11-30 01:28:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-30 01:28:15,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:15,478 INFO L422 BasicCegarLoop]: trace histogram [34, 27, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:15,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:15,679 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:15,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:15,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1379245434, now seen corresponding path program 24 times [2020-11-30 01:28:15,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:15,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088844244] [2020-11-30 01:28:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 364 proven. 756 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-30 01:28:16,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088844244] [2020-11-30 01:28:16,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76855338] [2020-11-30 01:28:16,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:16,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-11-30 01:28:16,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:16,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:28:16,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 405 proven. 49 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-11-30 01:28:16,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:16,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10] total 38 [2020-11-30 01:28:16,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542509869] [2020-11-30 01:28:16,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-30 01:28:16,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:16,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-30 01:28:16,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-11-30 01:28:16,895 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 38 states. [2020-11-30 01:28:17,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:17,135 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2020-11-30 01:28:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-30 01:28:17,136 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 76 [2020-11-30 01:28:17,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:17,137 INFO L225 Difference]: With dead ends: 103 [2020-11-30 01:28:17,138 INFO L226 Difference]: Without dead ends: 82 [2020-11-30 01:28:17,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-11-30 01:28:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-30 01:28:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-11-30 01:28:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-30 01:28:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-11-30 01:28:17,143 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 76 [2020-11-30 01:28:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:17,144 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-11-30 01:28:17,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-30 01:28:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-11-30 01:28:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-30 01:28:17,148 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:17,148 INFO L422 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:17,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-30 01:28:17,361 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:17,361 INFO L82 PathProgramCache]: Analyzing trace with hash 377178766, now seen corresponding path program 25 times [2020-11-30 01:28:17,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:17,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145052593] [2020-11-30 01:28:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-30 01:28:18,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145052593] [2020-11-30 01:28:18,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331677799] [2020-11-30 01:28:18,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:18,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 01:28:18,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-30 01:28:18,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:18,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-30 01:28:18,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661894295] [2020-11-30 01:28:18,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-30 01:28:18,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:18,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-30 01:28:18,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-11-30 01:28:18,670 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 32 states. [2020-11-30 01:28:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:18,870 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2020-11-30 01:28:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-30 01:28:18,871 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 80 [2020-11-30 01:28:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:18,872 INFO L225 Difference]: With dead ends: 106 [2020-11-30 01:28:18,872 INFO L226 Difference]: Without dead ends: 83 [2020-11-30 01:28:18,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-11-30 01:28:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-30 01:28:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-11-30 01:28:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-30 01:28:18,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-11-30 01:28:18,879 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 80 [2020-11-30 01:28:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:18,880 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-11-30 01:28:18,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-30 01:28:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-11-30 01:28:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-30 01:28:18,881 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:18,881 INFO L422 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:19,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-30 01:28:19,093 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2110813681, now seen corresponding path program 26 times [2020-11-30 01:28:19,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:19,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600406830] [2020-11-30 01:28:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-30 01:28:19,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600406830] [2020-11-30 01:28:19,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957008425] [2020-11-30 01:28:19,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:20,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:28:20,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:20,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-30 01:28:20,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-30 01:28:20,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:20,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-30 01:28:20,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097081812] [2020-11-30 01:28:20,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-30 01:28:20,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:20,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-30 01:28:20,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-11-30 01:28:20,106 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 33 states. [2020-11-30 01:28:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:20,268 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2020-11-30 01:28:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-30 01:28:20,269 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 82 [2020-11-30 01:28:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:20,270 INFO L225 Difference]: With dead ends: 108 [2020-11-30 01:28:20,271 INFO L226 Difference]: Without dead ends: 85 [2020-11-30 01:28:20,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-11-30 01:28:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-30 01:28:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-11-30 01:28:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-30 01:28:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2020-11-30 01:28:20,278 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 82 [2020-11-30 01:28:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:20,279 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2020-11-30 01:28:20,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-30 01:28:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2020-11-30 01:28:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-30 01:28:20,280 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:20,280 INFO L422 BasicCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:20,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:20,502 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:20,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:20,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1686656148, now seen corresponding path program 27 times [2020-11-30 01:28:20,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:20,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828413580] [2020-11-30 01:28:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-30 01:28:21,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828413580] [2020-11-30 01:28:21,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616402524] [2020-11-30 01:28:21,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:21,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-11-30 01:28:21,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:21,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:28:21,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 510 proven. 64 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-11-30 01:28:21,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:21,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 11] total 42 [2020-11-30 01:28:21,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720557207] [2020-11-30 01:28:21,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-30 01:28:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:21,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-30 01:28:21,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-11-30 01:28:21,883 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand 42 states. [2020-11-30 01:28:22,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:22,090 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2020-11-30 01:28:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-30 01:28:22,091 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 84 [2020-11-30 01:28:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:22,092 INFO L225 Difference]: With dead ends: 113 [2020-11-30 01:28:22,092 INFO L226 Difference]: Without dead ends: 90 [2020-11-30 01:28:22,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-11-30 01:28:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-30 01:28:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-11-30 01:28:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-30 01:28:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2020-11-30 01:28:22,097 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 84 [2020-11-30 01:28:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:22,097 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2020-11-30 01:28:22,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-30 01:28:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2020-11-30 01:28:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-30 01:28:22,098 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:22,098 INFO L422 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:22,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:22,313 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:22,313 INFO L82 PathProgramCache]: Analyzing trace with hash 95952412, now seen corresponding path program 28 times [2020-11-30 01:28:22,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:22,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499592089] [2020-11-30 01:28:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-11-30 01:28:23,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499592089] [2020-11-30 01:28:23,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759297300] [2020-11-30 01:28:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:23,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:28:23,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:23,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-30 01:28:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-11-30 01:28:23,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:23,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-30 01:28:23,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860618737] [2020-11-30 01:28:23,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-30 01:28:23,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:23,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-30 01:28:23,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-11-30 01:28:23,617 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 35 states. [2020-11-30 01:28:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:23,786 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2020-11-30 01:28:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-30 01:28:23,787 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 88 [2020-11-30 01:28:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:23,788 INFO L225 Difference]: With dead ends: 116 [2020-11-30 01:28:23,788 INFO L226 Difference]: Without dead ends: 91 [2020-11-30 01:28:23,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-11-30 01:28:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-30 01:28:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-11-30 01:28:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-30 01:28:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-11-30 01:28:23,793 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 88 [2020-11-30 01:28:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:23,794 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-11-30 01:28:23,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-30 01:28:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-11-30 01:28:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-30 01:28:23,795 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:23,795 INFO L422 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:24,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-30 01:28:24,017 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash 489240191, now seen corresponding path program 29 times [2020-11-30 01:28:24,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:24,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868473897] [2020-11-30 01:28:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-11-30 01:28:24,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868473897] [2020-11-30 01:28:24,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451657849] [2020-11-30 01:28:24,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:24,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-11-30 01:28:24,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-30 01:28:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-11-30 01:28:24,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:24,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-30 01:28:24,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496966685] [2020-11-30 01:28:24,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-30 01:28:24,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:24,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-30 01:28:24,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-11-30 01:28:24,930 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 36 states. [2020-11-30 01:28:25,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:25,178 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2020-11-30 01:28:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-30 01:28:25,179 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 90 [2020-11-30 01:28:25,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:25,180 INFO L225 Difference]: With dead ends: 118 [2020-11-30 01:28:25,180 INFO L226 Difference]: Without dead ends: 93 [2020-11-30 01:28:25,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-11-30 01:28:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-30 01:28:25,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-11-30 01:28:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-30 01:28:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-11-30 01:28:25,186 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 90 [2020-11-30 01:28:25,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:25,186 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-11-30 01:28:25,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-30 01:28:25,186 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-11-30 01:28:25,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-30 01:28:25,187 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:25,187 INFO L422 BasicCegarLoop]: trace histogram [42, 33, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:25,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:25,388 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:25,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:25,389 INFO L82 PathProgramCache]: Analyzing trace with hash 481673762, now seen corresponding path program 30 times [2020-11-30 01:28:25,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:25,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541616893] [2020-11-30 01:28:25,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 578 proven. 1122 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-11-30 01:28:26,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541616893] [2020-11-30 01:28:26,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630922059] [2020-11-30 01:28:26,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:26,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2020-11-30 01:28:26,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:26,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:28:26,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 627 proven. 81 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-11-30 01:28:26,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:26,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 12] total 46 [2020-11-30 01:28:26,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317845902] [2020-11-30 01:28:26,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-30 01:28:26,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:26,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-30 01:28:26,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-11-30 01:28:26,942 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 46 states. [2020-11-30 01:28:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:27,171 INFO L93 Difference]: Finished difference Result 123 states and 145 transitions. [2020-11-30 01:28:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-30 01:28:27,172 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 92 [2020-11-30 01:28:27,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:27,172 INFO L225 Difference]: With dead ends: 123 [2020-11-30 01:28:27,173 INFO L226 Difference]: Without dead ends: 98 [2020-11-30 01:28:27,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-11-30 01:28:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-30 01:28:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-11-30 01:28:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-30 01:28:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2020-11-30 01:28:27,179 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 92 [2020-11-30 01:28:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:27,180 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2020-11-30 01:28:27,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-30 01:28:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2020-11-30 01:28:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-30 01:28:27,181 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:27,181 INFO L422 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:27,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-30 01:28:27,397 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2096532778, now seen corresponding path program 31 times [2020-11-30 01:28:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:27,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027582458] [2020-11-30 01:28:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-30 01:28:28,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027582458] [2020-11-30 01:28:28,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923183797] [2020-11-30 01:28:28,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-30 01:28:28,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-30 01:28:28,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:28,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-30 01:28:28,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905521180] [2020-11-30 01:28:28,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-30 01:28:28,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:28,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-30 01:28:28,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-11-30 01:28:28,556 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 38 states. [2020-11-30 01:28:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:28,719 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2020-11-30 01:28:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-30 01:28:28,720 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 96 [2020-11-30 01:28:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:28,721 INFO L225 Difference]: With dead ends: 126 [2020-11-30 01:28:28,721 INFO L226 Difference]: Without dead ends: 99 [2020-11-30 01:28:28,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-11-30 01:28:28,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-30 01:28:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-11-30 01:28:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-30 01:28:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-11-30 01:28:28,727 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 96 [2020-11-30 01:28:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:28,727 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-11-30 01:28:28,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-30 01:28:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-11-30 01:28:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-30 01:28:28,728 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:28,728 INFO L422 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:28,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-30 01:28:28,929 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:28,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1413911181, now seen corresponding path program 32 times [2020-11-30 01:28:28,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:28,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047266329] [2020-11-30 01:28:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-30 01:28:30,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047266329] [2020-11-30 01:28:30,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513703087] [2020-11-30 01:28:30,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:30,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:28:30,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-30 01:28:30,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-30 01:28:30,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:30,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-30 01:28:30,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895615854] [2020-11-30 01:28:30,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-30 01:28:30,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-30 01:28:30,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-11-30 01:28:30,419 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 39 states. [2020-11-30 01:28:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:30,580 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2020-11-30 01:28:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-30 01:28:30,581 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 98 [2020-11-30 01:28:30,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:30,583 INFO L225 Difference]: With dead ends: 128 [2020-11-30 01:28:30,583 INFO L226 Difference]: Without dead ends: 101 [2020-11-30 01:28:30,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-11-30 01:28:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-30 01:28:30,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-11-30 01:28:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-30 01:28:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2020-11-30 01:28:30,589 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 98 [2020-11-30 01:28:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:30,590 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2020-11-30 01:28:30,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-30 01:28:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2020-11-30 01:28:30,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-30 01:28:30,591 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:30,591 INFO L422 BasicCegarLoop]: trace histogram [46, 36, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:30,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-30 01:28:30,804 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:30,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:30,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1750414544, now seen corresponding path program 33 times [2020-11-30 01:28:30,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:30,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271812995] [2020-11-30 01:28:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 703 proven. 1332 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-30 01:28:31,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271812995] [2020-11-30 01:28:31,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50421679] [2020-11-30 01:28:31,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:31,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-11-30 01:28:31,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:31,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 01:28:31,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 100 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-11-30 01:28:32,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:32,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2020-11-30 01:28:32,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339728643] [2020-11-30 01:28:32,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-30 01:28:32,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:32,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-30 01:28:32,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-11-30 01:28:32,658 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand 50 states. [2020-11-30 01:28:32,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:32,959 INFO L93 Difference]: Finished difference Result 133 states and 157 transitions. [2020-11-30 01:28:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-30 01:28:32,960 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 100 [2020-11-30 01:28:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:32,961 INFO L225 Difference]: With dead ends: 133 [2020-11-30 01:28:32,961 INFO L226 Difference]: Without dead ends: 106 [2020-11-30 01:28:32,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-11-30 01:28:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-30 01:28:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-11-30 01:28:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-30 01:28:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2020-11-30 01:28:32,968 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 100 [2020-11-30 01:28:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:32,968 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2020-11-30 01:28:32,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-30 01:28:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2020-11-30 01:28:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-11-30 01:28:32,969 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:32,969 INFO L422 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:33,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-30 01:28:33,170 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:33,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:33,171 INFO L82 PathProgramCache]: Analyzing trace with hash 352761784, now seen corresponding path program 34 times [2020-11-30 01:28:33,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:33,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844886629] [2020-11-30 01:28:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 01:28:34,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844886629] [2020-11-30 01:28:34,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516363575] [2020-11-30 01:28:34,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:34,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:28:34,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-30 01:28:34,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 01:28:34,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:34,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-30 01:28:34,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305835167] [2020-11-30 01:28:34,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-30 01:28:34,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:34,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-30 01:28:34,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 01:28:34,401 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 41 states. [2020-11-30 01:28:34,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:34,662 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2020-11-30 01:28:34,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-30 01:28:34,663 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 104 [2020-11-30 01:28:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:34,664 INFO L225 Difference]: With dead ends: 136 [2020-11-30 01:28:34,664 INFO L226 Difference]: Without dead ends: 107 [2020-11-30 01:28:34,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 01:28:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-30 01:28:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-11-30 01:28:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-30 01:28:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2020-11-30 01:28:34,671 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 104 [2020-11-30 01:28:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:34,671 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2020-11-30 01:28:34,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-30 01:28:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2020-11-30 01:28:34,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-30 01:28:34,672 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:34,672 INFO L422 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:34,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-30 01:28:34,873 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1224256027, now seen corresponding path program 35 times [2020-11-30 01:28:34,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:34,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960780518] [2020-11-30 01:28:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 01:28:36,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960780518] [2020-11-30 01:28:36,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997445463] [2020-11-30 01:28:36,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:36,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2020-11-30 01:28:36,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:36,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-30 01:28:36,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 01:28:36,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:36,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-11-30 01:28:36,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421432135] [2020-11-30 01:28:36,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-30 01:28:36,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:36,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-30 01:28:36,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-11-30 01:28:36,315 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 42 states. [2020-11-30 01:28:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:36,486 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2020-11-30 01:28:36,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-30 01:28:36,487 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 106 [2020-11-30 01:28:36,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:36,488 INFO L225 Difference]: With dead ends: 138 [2020-11-30 01:28:36,488 INFO L226 Difference]: Without dead ends: 109 [2020-11-30 01:28:36,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-11-30 01:28:36,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-30 01:28:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-11-30 01:28:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-30 01:28:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2020-11-30 01:28:36,495 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 106 [2020-11-30 01:28:36,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:36,495 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2020-11-30 01:28:36,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-30 01:28:36,495 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2020-11-30 01:28:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-11-30 01:28:36,496 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:36,496 INFO L422 BasicCegarLoop]: trace histogram [50, 39, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:36,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-30 01:28:36,709 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:36,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:36,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1211600830, now seen corresponding path program 36 times [2020-11-30 01:28:36,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:36,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143140396] [2020-11-30 01:28:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 840 proven. 1560 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 01:28:38,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143140396] [2020-11-30 01:28:38,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362468585] [2020-11-30 01:28:38,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:38,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2020-11-30 01:28:38,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 01:28:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 121 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2020-11-30 01:28:38,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:38,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2020-11-30 01:28:38,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092628863] [2020-11-30 01:28:38,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-30 01:28:38,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:38,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-30 01:28:38,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-11-30 01:28:38,938 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand 54 states. [2020-11-30 01:28:39,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:39,274 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2020-11-30 01:28:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-30 01:28:39,275 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 108 [2020-11-30 01:28:39,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:39,276 INFO L225 Difference]: With dead ends: 143 [2020-11-30 01:28:39,276 INFO L226 Difference]: Without dead ends: 114 [2020-11-30 01:28:39,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-11-30 01:28:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-30 01:28:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-11-30 01:28:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-30 01:28:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-11-30 01:28:39,281 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 108 [2020-11-30 01:28:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:39,281 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-11-30 01:28:39,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-30 01:28:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-11-30 01:28:39,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-30 01:28:39,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:39,282 INFO L422 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:39,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-30 01:28:39,483 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:39,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1708081722, now seen corresponding path program 37 times [2020-11-30 01:28:39,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:39,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574140236] [2020-11-30 01:28:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-11-30 01:28:40,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574140236] [2020-11-30 01:28:40,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369781339] [2020-11-30 01:28:40,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:41,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-30 01:28:41,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-11-30 01:28:41,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:41,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-11-30 01:28:41,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621898919] [2020-11-30 01:28:41,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-30 01:28:41,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:41,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-30 01:28:41,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-11-30 01:28:41,092 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 44 states. [2020-11-30 01:28:41,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:41,268 INFO L93 Difference]: Finished difference Result 146 states and 171 transitions. [2020-11-30 01:28:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-30 01:28:41,269 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 112 [2020-11-30 01:28:41,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:41,270 INFO L225 Difference]: With dead ends: 146 [2020-11-30 01:28:41,270 INFO L226 Difference]: Without dead ends: 115 [2020-11-30 01:28:41,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-11-30 01:28:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-30 01:28:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-11-30 01:28:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-30 01:28:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2020-11-30 01:28:41,283 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 112 [2020-11-30 01:28:41,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:41,283 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2020-11-30 01:28:41,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-30 01:28:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2020-11-30 01:28:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-11-30 01:28:41,285 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:41,285 INFO L422 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:41,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:41,498 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:41,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:41,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1418173737, now seen corresponding path program 38 times [2020-11-30 01:28:41,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:41,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096317974] [2020-11-30 01:28:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-11-30 01:28:43,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096317974] [2020-11-30 01:28:43,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063995315] [2020-11-30 01:28:43,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:43,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:28:43,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:43,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-30 01:28:43,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-11-30 01:28:43,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:43,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-11-30 01:28:43,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357046906] [2020-11-30 01:28:43,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-30 01:28:43,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:43,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-30 01:28:43,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-11-30 01:28:43,329 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 45 states. [2020-11-30 01:28:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:43,538 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2020-11-30 01:28:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-30 01:28:43,539 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 114 [2020-11-30 01:28:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:43,540 INFO L225 Difference]: With dead ends: 148 [2020-11-30 01:28:43,540 INFO L226 Difference]: Without dead ends: 117 [2020-11-30 01:28:43,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-11-30 01:28:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-30 01:28:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-11-30 01:28:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-30 01:28:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2020-11-30 01:28:43,544 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 114 [2020-11-30 01:28:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:43,544 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2020-11-30 01:28:43,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-30 01:28:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2020-11-30 01:28:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-30 01:28:43,546 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:43,546 INFO L422 BasicCegarLoop]: trace histogram [54, 42, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:43,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:43,765 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:43,765 INFO L82 PathProgramCache]: Analyzing trace with hash -727437364, now seen corresponding path program 39 times [2020-11-30 01:28:43,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:43,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435561175] [2020-11-30 01:28:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 989 proven. 1806 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-11-30 01:28:45,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435561175] [2020-11-30 01:28:45,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755968608] [2020-11-30 01:28:45,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:45,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2020-11-30 01:28:45,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:45,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 01:28:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1050 proven. 144 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2020-11-30 01:28:46,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:46,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15] total 58 [2020-11-30 01:28:46,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717501746] [2020-11-30 01:28:46,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-30 01:28:46,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:46,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-30 01:28:46,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-11-30 01:28:46,328 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand 58 states. [2020-11-30 01:28:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:46,618 INFO L93 Difference]: Finished difference Result 153 states and 181 transitions. [2020-11-30 01:28:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-30 01:28:46,618 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 116 [2020-11-30 01:28:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:46,620 INFO L225 Difference]: With dead ends: 153 [2020-11-30 01:28:46,620 INFO L226 Difference]: Without dead ends: 122 [2020-11-30 01:28:46,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-11-30 01:28:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-30 01:28:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-11-30 01:28:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-30 01:28:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2020-11-30 01:28:46,627 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 116 [2020-11-30 01:28:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:46,627 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2020-11-30 01:28:46,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-30 01:28:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2020-11-30 01:28:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-11-30 01:28:46,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:46,628 INFO L422 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:46,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:46,849 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash 238337876, now seen corresponding path program 40 times [2020-11-30 01:28:46,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:46,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555178704] [2020-11-30 01:28:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-30 01:28:48,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555178704] [2020-11-30 01:28:48,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270511424] [2020-11-30 01:28:48,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:48,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:28:48,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:48,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-30 01:28:48,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-30 01:28:48,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:48,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-11-30 01:28:48,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620785085] [2020-11-30 01:28:48,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-30 01:28:48,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-30 01:28:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-11-30 01:28:48,519 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand 47 states. [2020-11-30 01:28:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:48,717 INFO L93 Difference]: Finished difference Result 156 states and 183 transitions. [2020-11-30 01:28:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-30 01:28:48,718 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 120 [2020-11-30 01:28:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:48,719 INFO L225 Difference]: With dead ends: 156 [2020-11-30 01:28:48,719 INFO L226 Difference]: Without dead ends: 123 [2020-11-30 01:28:48,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-11-30 01:28:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-30 01:28:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-11-30 01:28:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-11-30 01:28:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2020-11-30 01:28:48,725 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 120 [2020-11-30 01:28:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:48,726 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2020-11-30 01:28:48,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-30 01:28:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2020-11-30 01:28:48,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-11-30 01:28:48,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:48,727 INFO L422 BasicCegarLoop]: trace histogram [57, 44, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:48,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-30 01:28:48,940 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash 95652791, now seen corresponding path program 41 times [2020-11-30 01:28:48,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:48,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461061933] [2020-11-30 01:28:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-30 01:28:50,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461061933] [2020-11-30 01:28:50,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823459583] [2020-11-30 01:28:50,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:50,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2020-11-30 01:28:50,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:50,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 46 conjunts are in the unsatisfiable core [2020-11-30 01:28:50,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-30 01:28:50,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:50,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-11-30 01:28:50,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955157849] [2020-11-30 01:28:50,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-30 01:28:50,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:50,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-30 01:28:50,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-11-30 01:28:50,575 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 48 states. [2020-11-30 01:28:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:50,882 INFO L93 Difference]: Finished difference Result 158 states and 185 transitions. [2020-11-30 01:28:50,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-30 01:28:50,883 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 122 [2020-11-30 01:28:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:50,884 INFO L225 Difference]: With dead ends: 158 [2020-11-30 01:28:50,884 INFO L226 Difference]: Without dead ends: 125 [2020-11-30 01:28:50,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-11-30 01:28:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-30 01:28:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-11-30 01:28:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-30 01:28:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2020-11-30 01:28:50,892 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 122 [2020-11-30 01:28:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:50,893 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2020-11-30 01:28:50,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-30 01:28:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2020-11-30 01:28:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-30 01:28:50,894 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:50,894 INFO L422 BasicCegarLoop]: trace histogram [58, 45, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:51,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:51,095 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash 414239578, now seen corresponding path program 42 times [2020-11-30 01:28:51,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:51,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112175374] [2020-11-30 01:28:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1150 proven. 2070 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-30 01:28:52,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112175374] [2020-11-30 01:28:52,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358723461] [2020-11-30 01:28:52,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:52,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-11-30 01:28:52,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:52,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 01:28:52,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1215 proven. 169 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2020-11-30 01:28:53,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:53,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 16] total 62 [2020-11-30 01:28:53,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705115473] [2020-11-30 01:28:53,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-30 01:28:53,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:53,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-30 01:28:53,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-11-30 01:28:53,770 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand 62 states. [2020-11-30 01:28:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:54,137 INFO L93 Difference]: Finished difference Result 163 states and 193 transitions. [2020-11-30 01:28:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-30 01:28:54,138 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 124 [2020-11-30 01:28:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:54,139 INFO L225 Difference]: With dead ends: 163 [2020-11-30 01:28:54,139 INFO L226 Difference]: Without dead ends: 130 [2020-11-30 01:28:54,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-11-30 01:28:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-30 01:28:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-11-30 01:28:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-11-30 01:28:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2020-11-30 01:28:54,147 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 124 [2020-11-30 01:28:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:54,147 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2020-11-30 01:28:54,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-30 01:28:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2020-11-30 01:28:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-11-30 01:28:54,149 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:54,149 INFO L422 BasicCegarLoop]: trace histogram [60, 46, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:54,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:54,373 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:54,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:54,373 INFO L82 PathProgramCache]: Analyzing trace with hash 709549154, now seen corresponding path program 43 times [2020-11-30 01:28:54,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:54,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189330403] [2020-11-30 01:28:54,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-11-30 01:28:55,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189330403] [2020-11-30 01:28:55,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459862650] [2020-11-30 01:28:55,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:56,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-30 01:28:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-11-30 01:28:56,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:56,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-11-30 01:28:56,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092694044] [2020-11-30 01:28:56,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-30 01:28:56,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:56,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-30 01:28:56,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-11-30 01:28:56,168 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand 50 states. [2020-11-30 01:28:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:56,356 INFO L93 Difference]: Finished difference Result 166 states and 195 transitions. [2020-11-30 01:28:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-30 01:28:56,357 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 128 [2020-11-30 01:28:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:56,358 INFO L225 Difference]: With dead ends: 166 [2020-11-30 01:28:56,358 INFO L226 Difference]: Without dead ends: 131 [2020-11-30 01:28:56,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-11-30 01:28:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-30 01:28:56,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-11-30 01:28:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-30 01:28:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2020-11-30 01:28:56,365 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 128 [2020-11-30 01:28:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:56,366 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2020-11-30 01:28:56,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-30 01:28:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2020-11-30 01:28:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-30 01:28:56,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:56,367 INFO L422 BasicCegarLoop]: trace histogram [61, 47, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:56,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-30 01:28:56,583 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:56,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:56,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1565223483, now seen corresponding path program 44 times [2020-11-30 01:28:56,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:56,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170813527] [2020-11-30 01:28:56,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-11-30 01:28:58,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170813527] [2020-11-30 01:28:58,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899667733] [2020-11-30 01:28:58,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:28:58,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:28:58,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:58,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 49 conjunts are in the unsatisfiable core [2020-11-30 01:28:58,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-11-30 01:28:58,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:28:58,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-11-30 01:28:58,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759802061] [2020-11-30 01:28:58,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-30 01:28:58,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:58,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-30 01:28:58,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-11-30 01:28:58,365 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand 51 states. [2020-11-30 01:28:58,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:58,653 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2020-11-30 01:28:58,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-30 01:28:58,654 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 130 [2020-11-30 01:28:58,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:58,655 INFO L225 Difference]: With dead ends: 168 [2020-11-30 01:28:58,655 INFO L226 Difference]: Without dead ends: 133 [2020-11-30 01:28:58,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-11-30 01:28:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-30 01:28:58,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-11-30 01:28:58,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-30 01:28:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2020-11-30 01:28:58,662 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 130 [2020-11-30 01:28:58,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:58,662 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2020-11-30 01:28:58,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-30 01:28:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2020-11-30 01:28:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-30 01:28:58,663 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:58,663 INFO L422 BasicCegarLoop]: trace histogram [62, 48, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:58,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-30 01:28:58,864 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:58,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1483373976, now seen corresponding path program 45 times [2020-11-30 01:28:58,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:58,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879962735] [2020-11-30 01:28:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:29:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1323 proven. 2352 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-11-30 01:29:00,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879962735] [2020-11-30 01:29:00,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132935929] [2020-11-30 01:29:00,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:29:00,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-11-30 01:29:00,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:29:00,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 01:29:00,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:29:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1392 proven. 196 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2020-11-30 01:29:02,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:29:02,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 17] total 66 [2020-11-30 01:29:02,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849190720] [2020-11-30 01:29:02,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-30 01:29:02,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:29:02,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-30 01:29:02,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-11-30 01:29:02,055 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand 66 states. [2020-11-30 01:29:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:29:02,451 INFO L93 Difference]: Finished difference Result 173 states and 205 transitions. [2020-11-30 01:29:02,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-30 01:29:02,452 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 132 [2020-11-30 01:29:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:29:02,453 INFO L225 Difference]: With dead ends: 173 [2020-11-30 01:29:02,453 INFO L226 Difference]: Without dead ends: 138 [2020-11-30 01:29:02,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-11-30 01:29:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-30 01:29:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-11-30 01:29:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-11-30 01:29:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2020-11-30 01:29:02,460 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 132 [2020-11-30 01:29:02,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:29:02,461 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2020-11-30 01:29:02,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-11-30 01:29:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2020-11-30 01:29:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-30 01:29:02,462 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:29:02,463 INFO L422 BasicCegarLoop]: trace histogram [64, 49, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:29:02,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-30 01:29:02,673 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:29:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:29:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1629697264, now seen corresponding path program 46 times [2020-11-30 01:29:02,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:29:02,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137650007] [2020-11-30 01:29:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:29:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:29:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-11-30 01:29:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137650007] [2020-11-30 01:29:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553243477] [2020-11-30 01:29:04,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:29:04,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:29:04,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:29:04,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 51 conjunts are in the unsatisfiable core [2020-11-30 01:29:04,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:29:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-11-30 01:29:04,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:29:04,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-11-30 01:29:04,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766835457] [2020-11-30 01:29:04,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-30 01:29:04,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:29:04,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-30 01:29:04,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-11-30 01:29:04,645 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand 53 states. [2020-11-30 01:29:04,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:29:04,903 INFO L93 Difference]: Finished difference Result 176 states and 207 transitions. [2020-11-30 01:29:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-30 01:29:04,903 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 136 [2020-11-30 01:29:04,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:29:04,905 INFO L225 Difference]: With dead ends: 176 [2020-11-30 01:29:04,905 INFO L226 Difference]: Without dead ends: 139 [2020-11-30 01:29:04,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-11-30 01:29:04,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-30 01:29:04,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-11-30 01:29:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-30 01:29:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2020-11-30 01:29:04,912 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 136 [2020-11-30 01:29:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:29:04,913 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2020-11-30 01:29:04,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-30 01:29:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2020-11-30 01:29:04,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-11-30 01:29:04,914 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:29:04,914 INFO L422 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:29:05,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:29:05,129 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:29:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:29:05,129 INFO L82 PathProgramCache]: Analyzing trace with hash 725277523, now seen corresponding path program 47 times [2020-11-30 01:29:05,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:29:05,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035876173] [2020-11-30 01:29:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:29:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:29:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:29:08,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035876173] [2020-11-30 01:29:08,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855153907] [2020-11-30 01:29:08,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:29:08,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-11-30 01:29:08,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:29:08,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-30 01:29:08,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:29:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 1024 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-11-30 01:29:10,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:29:10,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 35] total 85 [2020-11-30 01:29:10,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378731791] [2020-11-30 01:29:10,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-11-30 01:29:10,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:29:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-11-30 01:29:10,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-11-30 01:29:10,316 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand 85 states. [2020-11-30 01:29:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:29:10,897 INFO L93 Difference]: Finished difference Result 182 states and 233 transitions. [2020-11-30 01:29:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-11-30 01:29:10,898 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 138 [2020-11-30 01:29:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:29:10,900 INFO L225 Difference]: With dead ends: 182 [2020-11-30 01:29:10,900 INFO L226 Difference]: Without dead ends: 176 [2020-11-30 01:29:10,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-11-30 01:29:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-11-30 01:29:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-11-30 01:29:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-11-30 01:29:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 208 transitions. [2020-11-30 01:29:10,910 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 208 transitions. Word has length 138 [2020-11-30 01:29:10,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:29:10,911 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 208 transitions. [2020-11-30 01:29:10,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-11-30 01:29:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 208 transitions. [2020-11-30 01:29:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-11-30 01:29:10,914 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:29:10,914 INFO L422 BasicCegarLoop]: trace histogram [83, 50, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:29:11,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:29:11,141 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:29:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:29:11,141 INFO L82 PathProgramCache]: Analyzing trace with hash 737031085, now seen corresponding path program 48 times [2020-11-30 01:29:11,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:29:11,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648048858] [2020-11-30 01:29:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:29:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:29:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:29:16,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648048858] [2020-11-30 01:29:16,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532503785] [2020-11-30 01:29:16,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:29:16,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2020-11-30 01:29:16,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:29:16,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-30 01:29:16,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:29:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3486 proven. 1681 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2020-11-30 01:29:17,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:29:17,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 44] total 94 [2020-11-30 01:29:17,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897806229] [2020-11-30 01:29:17,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-11-30 01:29:17,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:29:17,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-11-30 01:29:17,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-11-30 01:29:17,439 INFO L87 Difference]: Start difference. First operand 175 states and 208 transitions. Second operand 94 states. [2020-11-30 01:29:18,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:29:18,246 INFO L93 Difference]: Finished difference Result 200 states and 251 transitions. [2020-11-30 01:29:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-30 01:29:18,247 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 174 [2020-11-30 01:29:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:29:18,249 INFO L225 Difference]: With dead ends: 200 [2020-11-30 01:29:18,249 INFO L226 Difference]: Without dead ends: 194 [2020-11-30 01:29:18,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-11-30 01:29:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-30 01:29:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2020-11-30 01:29:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-11-30 01:29:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 235 transitions. [2020-11-30 01:29:18,260 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 235 transitions. Word has length 174 [2020-11-30 01:29:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:29:18,260 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 235 transitions. [2020-11-30 01:29:18,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-11-30 01:29:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 235 transitions. [2020-11-30 01:29:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-11-30 01:29:18,262 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:29:18,263 INFO L422 BasicCegarLoop]: trace histogram [92, 50, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:29:18,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:29:18,488 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:29:18,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:29:18,489 INFO L82 PathProgramCache]: Analyzing trace with hash 496572922, now seen corresponding path program 49 times [2020-11-30 01:29:18,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:29:18,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694668736] [2020-11-30 01:29:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:29:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:29:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:29:24,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694668736] [2020-11-30 01:29:24,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701599792] [2020-11-30 01:29:24,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:29:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:29:24,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 94 conjunts are in the unsatisfiable core [2020-11-30 01:29:24,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:29:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:29:25,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:29:25,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2020-11-30 01:29:25,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477631833] [2020-11-30 01:29:25,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-11-30 01:29:25,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:29:25,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-11-30 01:29:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-11-30 01:29:25,052 INFO L87 Difference]: Start difference. First operand 193 states and 235 transitions. Second operand 96 states. [2020-11-30 01:29:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:29:25,958 INFO L93 Difference]: Finished difference Result 202 states and 246 transitions. [2020-11-30 01:29:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-11-30 01:29:25,959 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 192 [2020-11-30 01:29:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:29:25,960 INFO L225 Difference]: With dead ends: 202 [2020-11-30 01:29:25,960 INFO L226 Difference]: Without dead ends: 196 [2020-11-30 01:29:25,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-11-30 01:29:25,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-11-30 01:29:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-11-30 01:29:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-11-30 01:29:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 238 transitions. [2020-11-30 01:29:25,967 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 238 transitions. Word has length 192 [2020-11-30 01:29:25,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:29:25,968 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 238 transitions. [2020-11-30 01:29:25,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-11-30 01:29:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 238 transitions. [2020-11-30 01:29:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-30 01:29:25,970 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:29:25,970 INFO L422 BasicCegarLoop]: trace histogram [93, 50, 43, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:29:26,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:29:26,178 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:29:26,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:29:26,179 INFO L82 PathProgramCache]: Analyzing trace with hash -920957729, now seen corresponding path program 50 times [2020-11-30 01:29:26,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:29:26,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890054173] [2020-11-30 01:29:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:29:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:29:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:29:32,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890054173] [2020-11-30 01:29:32,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337226797] [2020-11-30 01:29:32,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:29:32,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:29:32,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:29:32,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 95 conjunts are in the unsatisfiable core [2020-11-30 01:29:32,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:29:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:29:32,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:29:32,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2020-11-30 01:29:32,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30926906] [2020-11-30 01:29:32,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-11-30 01:29:32,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:29:32,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-11-30 01:29:32,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-11-30 01:29:32,931 INFO L87 Difference]: Start difference. First operand 195 states and 238 transitions. Second operand 97 states. [2020-11-30 01:29:33,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:29:33,762 INFO L93 Difference]: Finished difference Result 204 states and 249 transitions. [2020-11-30 01:29:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-11-30 01:29:33,763 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 194 [2020-11-30 01:29:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:29:33,765 INFO L225 Difference]: With dead ends: 204 [2020-11-30 01:29:33,765 INFO L226 Difference]: Without dead ends: 198 [2020-11-30 01:29:33,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-11-30 01:29:33,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-30 01:29:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2020-11-30 01:29:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-11-30 01:29:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 241 transitions. [2020-11-30 01:29:33,774 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 241 transitions. Word has length 194 [2020-11-30 01:29:33,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:29:33,775 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 241 transitions. [2020-11-30 01:29:33,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-11-30 01:29:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 241 transitions. [2020-11-30 01:29:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-11-30 01:29:33,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:29:33,777 INFO L422 BasicCegarLoop]: trace histogram [94, 50, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:29:33,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-30 01:29:33,997 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:29:33,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:29:33,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1663280508, now seen corresponding path program 51 times [2020-11-30 01:29:33,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:29:33,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934478657] [2020-11-30 01:29:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:29:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:29:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:29:40,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934478657] [2020-11-30 01:29:40,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373658144] [2020-11-30 01:29:40,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:29:40,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2020-11-30 01:29:40,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:29:40,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-30 01:29:40,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:29:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 4450 proven. 1936 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-11-30 01:29:40,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:29:40,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 47] total 97 [2020-11-30 01:29:40,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530520857] [2020-11-30 01:29:40,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-11-30 01:29:40,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:29:40,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-11-30 01:29:40,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-11-30 01:29:40,765 INFO L87 Difference]: Start difference. First operand 197 states and 241 transitions. Second operand 97 states. [2020-11-30 01:29:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:29:41,640 INFO L93 Difference]: Finished difference Result 206 states and 252 transitions. [2020-11-30 01:29:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-11-30 01:29:41,641 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 196 [2020-11-30 01:29:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:29:41,643 INFO L225 Difference]: With dead ends: 206 [2020-11-30 01:29:41,643 INFO L226 Difference]: Without dead ends: 200 [2020-11-30 01:29:41,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-11-30 01:29:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-11-30 01:29:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-11-30 01:29:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-30 01:29:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 244 transitions. [2020-11-30 01:29:41,653 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 244 transitions. Word has length 196 [2020-11-30 01:29:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:29:41,653 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 244 transitions. [2020-11-30 01:29:41,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-11-30 01:29:41,654 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 244 transitions. [2020-11-30 01:29:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-11-30 01:29:41,655 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:29:41,655 INFO L422 BasicCegarLoop]: trace histogram [95, 50, 45, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:29:41,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:29:41,868 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:29:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:29:41,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2070899991, now seen corresponding path program 52 times [2020-11-30 01:29:41,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:29:41,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600364473] [2020-11-30 01:29:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:29:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:29:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:29:48,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600364473] [2020-11-30 01:29:48,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991180291] [2020-11-30 01:29:48,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:29:48,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:29:48,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:29:48,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 97 conjunts are in the unsatisfiable core [2020-11-30 01:29:48,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:29:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:29:48,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:29:48,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2020-11-30 01:29:48,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929693367] [2020-11-30 01:29:48,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-11-30 01:29:48,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:29:48,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-11-30 01:29:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2020-11-30 01:29:48,973 INFO L87 Difference]: Start difference. First operand 199 states and 244 transitions. Second operand 99 states. [2020-11-30 01:29:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:29:49,899 INFO L93 Difference]: Finished difference Result 208 states and 255 transitions. [2020-11-30 01:29:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-11-30 01:29:49,900 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 198 [2020-11-30 01:29:49,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:29:49,902 INFO L225 Difference]: With dead ends: 208 [2020-11-30 01:29:49,902 INFO L226 Difference]: Without dead ends: 202 [2020-11-30 01:29:49,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2020-11-30 01:29:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-30 01:29:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2020-11-30 01:29:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-30 01:29:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 247 transitions. [2020-11-30 01:29:49,907 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 247 transitions. Word has length 198 [2020-11-30 01:29:49,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:29:49,908 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 247 transitions. [2020-11-30 01:29:49,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-11-30 01:29:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 247 transitions. [2020-11-30 01:29:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-11-30 01:29:49,909 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:29:49,909 INFO L422 BasicCegarLoop]: trace histogram [96, 50, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:29:50,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-30 01:29:50,110 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:29:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:29:50,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1343768078, now seen corresponding path program 53 times [2020-11-30 01:29:50,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:29:50,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069835997] [2020-11-30 01:29:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:29:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:29:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:29:56,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069835997] [2020-11-30 01:29:56,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122504768] [2020-11-30 01:29:56,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:29:56,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2020-11-30 01:29:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:29:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 51 conjunts are in the unsatisfiable core [2020-11-30 01:29:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:29:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 4656 proven. 2304 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2020-11-30 01:29:57,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:29:57,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 51] total 101 [2020-11-30 01:29:57,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473790514] [2020-11-30 01:29:57,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-11-30 01:29:57,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:29:57,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-11-30 01:29:57,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-11-30 01:29:57,294 INFO L87 Difference]: Start difference. First operand 201 states and 247 transitions. Second operand 101 states. [2020-11-30 01:29:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:29:58,257 INFO L93 Difference]: Finished difference Result 214 states and 266 transitions. [2020-11-30 01:29:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-11-30 01:29:58,258 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2020-11-30 01:29:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:29:58,259 INFO L225 Difference]: With dead ends: 214 [2020-11-30 01:29:58,259 INFO L226 Difference]: Without dead ends: 208 [2020-11-30 01:29:58,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-11-30 01:29:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-30 01:29:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-11-30 01:29:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-11-30 01:29:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 256 transitions. [2020-11-30 01:29:58,267 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 256 transitions. Word has length 200 [2020-11-30 01:29:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:29:58,268 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 256 transitions. [2020-11-30 01:29:58,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-11-30 01:29:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 256 transitions. [2020-11-30 01:29:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-11-30 01:29:58,270 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:29:58,270 INFO L422 BasicCegarLoop]: trace histogram [99, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:29:58,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-30 01:29:58,485 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:29:58,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:29:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1341874173, now seen corresponding path program 54 times [2020-11-30 01:29:58,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:29:58,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969923194] [2020-11-30 01:29:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:29:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:30:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:30:05,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969923194] [2020-11-30 01:30:05,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764720098] [2020-11-30 01:30:05,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:30:05,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 99 check-sat command(s) [2020-11-30 01:30:05,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:30:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 52 conjunts are in the unsatisfiable core [2020-11-30 01:30:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:30:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 4950 proven. 2401 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-11-30 01:30:06,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:30:06,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 52] total 102 [2020-11-30 01:30:06,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658001210] [2020-11-30 01:30:06,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-11-30 01:30:06,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:30:06,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-11-30 01:30:06,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-11-30 01:30:06,017 INFO L87 Difference]: Start difference. First operand 207 states and 256 transitions. Second operand 102 states. [2020-11-30 01:30:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:30:07,296 INFO L93 Difference]: Finished difference Result 215 states and 265 transitions. [2020-11-30 01:30:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-11-30 01:30:07,297 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 206 [2020-11-30 01:30:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:30:07,299 INFO L225 Difference]: With dead ends: 215 [2020-11-30 01:30:07,299 INFO L226 Difference]: Without dead ends: 209 [2020-11-30 01:30:07,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-11-30 01:30:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-30 01:30:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2020-11-30 01:30:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-11-30 01:30:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 259 transitions. [2020-11-30 01:30:07,308 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 259 transitions. Word has length 206 [2020-11-30 01:30:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:30:07,309 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 259 transitions. [2020-11-30 01:30:07,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-11-30 01:30:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 259 transitions. [2020-11-30 01:30:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-11-30 01:30:07,310 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:30:07,310 INFO L422 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:30:07,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:30:07,511 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:30:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:30:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash -335274462, now seen corresponding path program 55 times [2020-11-30 01:30:07,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:30:07,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716237022] [2020-11-30 01:30:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:30:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:30:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2020-11-30 01:30:10,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716237022] [2020-11-30 01:30:10,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524652674] [2020-11-30 01:30:10,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/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 [2020-11-30 01:30:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:30:10,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 105 conjunts are in the unsatisfiable core [2020-11-30 01:30:10,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:30:10,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:30:10,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:30:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2020-11-30 01:30:11,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:30:11,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-11-30 01:30:11,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639832464] [2020-11-30 01:30:11,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-30 01:30:11,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:30:11,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-30 01:30:11,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2020-11-30 01:30:11,117 INFO L87 Difference]: Start difference. First operand 209 states and 259 transitions. Second operand 55 states. [2020-11-30 01:30:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:30:14,706 INFO L93 Difference]: Finished difference Result 2866 states and 4241 transitions. [2020-11-30 01:30:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-30 01:30:14,707 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 208 [2020-11-30 01:30:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:30:14,727 INFO L225 Difference]: With dead ends: 2866 [2020-11-30 01:30:14,728 INFO L226 Difference]: Without dead ends: 2860 [2020-11-30 01:30:14,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 206 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2020-11-30 01:30:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2020-11-30 01:30:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 211. [2020-11-30 01:30:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-11-30 01:30:14,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 262 transitions. [2020-11-30 01:30:14,808 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 262 transitions. Word has length 208 [2020-11-30 01:30:14,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:30:14,808 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 262 transitions. [2020-11-30 01:30:14,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-30 01:30:14,809 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 262 transitions. [2020-11-30 01:30:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-11-30 01:30:14,811 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:30:14,811 INFO L422 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:30:15,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-30 01:30:15,025 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:30:15,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:30:15,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1462376697, now seen corresponding path program 56 times [2020-11-30 01:30:15,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:30:15,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703889950] [2020-11-30 01:30:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:30:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:30:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2020-11-30 01:30:17,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703889950] [2020-11-30 01:30:17,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:30:17,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-11-30 01:30:17,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253250746] [2020-11-30 01:30:17,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-30 01:30:17,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:30:17,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-30 01:30:17,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-11-30 01:30:17,312 INFO L87 Difference]: Start difference. First operand 211 states and 262 transitions. Second operand 52 states. [2020-11-30 01:30:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:30:17,852 INFO L93 Difference]: Finished difference Result 310 states and 410 transitions. [2020-11-30 01:30:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-30 01:30:17,853 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 210 [2020-11-30 01:30:17,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:30:17,854 INFO L225 Difference]: With dead ends: 310 [2020-11-30 01:30:17,854 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:30:17,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-11-30 01:30:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:30:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:30:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:30:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:30:17,855 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 210 [2020-11-30 01:30:17,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:30:17,855 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:30:17,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-30 01:30:17,855 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:30:17,855 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:30:17,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-11-30 01:30:17,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:30:19,335 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 1862 DAG size of output: 452 [2020-11-30 01:30:22,358 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 452 DAG size of output: 357 [2020-11-30 01:30:22,367 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:30:22,368 INFO L274 CegarLoopResult]: For program point L27-2(lines 27 34) no Hoare annotation was computed. [2020-11-30 01:30:22,368 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-30 01:30:22,368 INFO L277 CegarLoopResult]: At program point L36(lines 24 37) the Hoare annotation is: true [2020-11-30 01:30:22,368 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 01:30:22,368 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:30:22,368 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 01:30:22,368 INFO L274 CegarLoopResult]: For program point L28(lines 28 33) no Hoare annotation was computed. [2020-11-30 01:30:22,370 INFO L270 CegarLoopResult]: At program point L28-2(lines 27 34) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~x~0 70) (<= 70 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 70) (<= 70 ULTIMATE.start_main_~y~0)) (and (<= 74 ULTIMATE.start_main_~x~0) (<= 74 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 74) (<= ULTIMATE.start_main_~y~0 74)) (and (<= ULTIMATE.start_main_~y~0 71) (<= ULTIMATE.start_main_~x~0 71) (<= 71 ULTIMATE.start_main_~x~0) (<= 71 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 83) (<= ULTIMATE.start_main_~y~0 83) (<= 83 ULTIMATE.start_main_~y~0) (<= 83 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 82) (<= 82 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 82) (<= 82 ULTIMATE.start_main_~x~0)) (and (<= 96 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 96) (<= 96 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 96)) (and (<= 65 ULTIMATE.start_main_~y~0) (<= 65 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 65) (<= ULTIMATE.start_main_~y~0 65)) (and (<= 76 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 76) (<= 76 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 76)) (and (<= 85 ULTIMATE.start_main_~y~0) (<= 85 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 85) (<= ULTIMATE.start_main_~x~0 85)) (and (<= 67 ULTIMATE.start_main_~y~0) (<= 67 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 67) (<= ULTIMATE.start_main_~y~0 67)) (and (<= ULTIMATE.start_main_~y~0 57) (<= 57 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 57) (<= 57 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 80) (<= ULTIMATE.start_main_~y~0 80) (<= 80 ULTIMATE.start_main_~y~0) (<= 80 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 89) (<= ULTIMATE.start_main_~x~0 89) (<= 89 ULTIMATE.start_main_~y~0) (<= 89 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 88) (<= 88 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 88) (<= 88 ULTIMATE.start_main_~x~0)) (and (<= 75 ULTIMATE.start_main_~x~0) (<= 75 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 75) (<= ULTIMATE.start_main_~x~0 75)) (and (<= ULTIMATE.start_main_~y~0 86) (<= ULTIMATE.start_main_~x~0 86) (<= 86 ULTIMATE.start_main_~x~0) (<= 86 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 64) (<= ULTIMATE.start_main_~x~0 64) (<= 64 ULTIMATE.start_main_~x~0) (<= 64 ULTIMATE.start_main_~y~0)) (and (<= 79 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 79) (<= ULTIMATE.start_main_~y~0 79) (<= 79 ULTIMATE.start_main_~x~0)) (and (<= 77 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 77) (<= 77 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 77)) (and (<= ULTIMATE.start_main_~y~0 63) (<= 63 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 63) (<= 63 ULTIMATE.start_main_~y~0)) (and (<= 100 ULTIMATE.start_main_~x~0) (< 99 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 100)) (and (<= ULTIMATE.start_main_~y~0 98) (<= 98 ULTIMATE.start_main_~y~0) (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (<= 53 ULTIMATE.start_main_~x~0) (<= 53 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 53) (<= ULTIMATE.start_main_~x~0 53)) (and (<= ULTIMATE.start_main_~y~0 78) (<= ULTIMATE.start_main_~x~0 78) (<= 78 ULTIMATE.start_main_~y~0) (<= 78 ULTIMATE.start_main_~x~0)) (and (<= 52 ULTIMATE.start_main_~x~0) (<= 52 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 52) (<= ULTIMATE.start_main_~x~0 52)) (and (<= 60 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 61) (<= ULTIMATE.start_main_~y~0 60) (<= 60 ULTIMATE.start_main_~x~0)) (and (<= 99 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 99) (<= ULTIMATE.start_main_~y~0 99) (<= 99 ULTIMATE.start_main_~x~0)) (and (<= 81 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 81) (<= ULTIMATE.start_main_~y~0 81) (<= 81 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 68) (<= ULTIMATE.start_main_~x~0 68) (<= 68 ULTIMATE.start_main_~y~0) (<= 68 ULTIMATE.start_main_~x~0)) (and (< ULTIMATE.start_main_~x~0 51) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 87) (<= 87 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 87) (<= 87 ULTIMATE.start_main_~x~0)) (and (<= 92 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 92) (<= ULTIMATE.start_main_~y~0 92) (<= 92 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 93) (<= 93 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 93) (<= 93 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 69) (<= ULTIMATE.start_main_~y~0 69) (<= 69 ULTIMATE.start_main_~x~0) (<= 69 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 51) (<= 51 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 51) (<= 51 ULTIMATE.start_main_~x~0)) (and (<= 90 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 90) (<= 90 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 90)) (and (<= 91 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 91) (<= ULTIMATE.start_main_~y~0 91) (<= 91 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 56) (<= 56 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 57) (<= 56 ULTIMATE.start_main_~x~0)) (and (<= 94 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 94) (<= ULTIMATE.start_main_~y~0 94) (<= 94 ULTIMATE.start_main_~y~0)) (and (<= 97 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 97) (<= 97 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 97)) (and (<= 55 ULTIMATE.start_main_~y~0) (<= 55 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 55) (<= ULTIMATE.start_main_~y~0 55)) (and (<= 58 ULTIMATE.start_main_~x~0) (<= 58 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 58) (< ULTIMATE.start_main_~x~0 59)) (and (<= ULTIMATE.start_main_~y~0 72) (<= 72 ULTIMATE.start_main_~y~0) (<= 72 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 72)) (and (<= 95 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 95) (<= 95 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 95)) (and (<= ULTIMATE.start_main_~x~0 73) (<= 73 ULTIMATE.start_main_~x~0) (<= 73 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 73)) (and (<= ULTIMATE.start_main_~y~0 54) (< ULTIMATE.start_main_~x~0 55) (<= 54 ULTIMATE.start_main_~y~0) (<= 54 ULTIMATE.start_main_~x~0)) (and (<= 62 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 62) (<= 62 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 62)) (and (<= ULTIMATE.start_main_~x~0 66) (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 66) (<= 66 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 59) (<= ULTIMATE.start_main_~x~0 59) (<= 59 ULTIMATE.start_main_~x~0) (<= 59 ULTIMATE.start_main_~y~0)) (and (< ULTIMATE.start_main_~x~0 62) (<= ULTIMATE.start_main_~y~0 61) (<= 61 ULTIMATE.start_main_~x~0) (<= 61 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 84) (<= 84 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 84) (<= 84 ULTIMATE.start_main_~x~0))) [2020-11-30 01:30:22,371 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-30 01:30:22,372 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-30 01:30:22,372 INFO L277 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-11-30 01:30:22,372 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-30 01:30:22,372 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-30 01:30:22,372 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-30 01:30:22,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:30:22 BoogieIcfgContainer [2020-11-30 01:30:22,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:30:22,444 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:30:22,445 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:30:22,445 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:30:22,446 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:27:53" (3/4) ... [2020-11-30 01:30:22,450 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:30:22,463 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-30 01:30:22,463 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 01:30:22,463 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:30:22,464 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:30:22,513 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1f6ceef8-503c-4eae-8021-c9d9498b93ab/bin/uautomizer/witness.graphml [2020-11-30 01:30:22,513 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:30:22,514 INFO L168 Benchmark]: Toolchain (without parser) took 149738.53 ms. Allocated memory was 100.7 MB in the beginning and 446.7 MB in the end (delta: 346.0 MB). Free memory was 74.3 MB in the beginning and 299.8 MB in the end (delta: -225.5 MB). Peak memory consumption was 119.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:30:22,515 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory is still 60.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:30:22,515 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.95 ms. Allocated memory is still 100.7 MB. Free memory was 74.1 MB in the beginning and 76.6 MB in the end (delta: -2.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:30:22,516 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.78 ms. Allocated memory is still 100.7 MB. Free memory was 76.6 MB in the beginning and 75.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:30:22,516 INFO L168 Benchmark]: Boogie Preprocessor took 22.16 ms. Allocated memory is still 100.7 MB. Free memory was 75.1 MB in the beginning and 74.2 MB in the end (delta: 912.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:30:22,517 INFO L168 Benchmark]: RCFGBuilder took 546.86 ms. Allocated memory is still 100.7 MB. Free memory was 74.0 MB in the beginning and 63.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:30:22,517 INFO L168 Benchmark]: TraceAbstraction took 148682.35 ms. Allocated memory was 100.7 MB in the beginning and 446.7 MB in the end (delta: 346.0 MB). Free memory was 63.3 MB in the beginning and 303.0 MB in the end (delta: -239.6 MB). Peak memory consumption was 253.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:30:22,518 INFO L168 Benchmark]: Witness Printer took 68.75 ms. Allocated memory is still 446.7 MB. Free memory was 303.0 MB in the beginning and 299.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:30:22,520 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory is still 60.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 352.95 ms. Allocated memory is still 100.7 MB. Free memory was 74.1 MB in the beginning and 76.6 MB in the end (delta: -2.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.78 ms. Allocated memory is still 100.7 MB. Free memory was 76.6 MB in the beginning and 75.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.16 ms. Allocated memory is still 100.7 MB. Free memory was 75.1 MB in the beginning and 74.2 MB in the end (delta: 912.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 546.86 ms. Allocated memory is still 100.7 MB. Free memory was 74.0 MB in the beginning and 63.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 148682.35 ms. Allocated memory was 100.7 MB in the beginning and 446.7 MB in the end (delta: 346.0 MB). Free memory was 63.3 MB in the beginning and 303.0 MB in the end (delta: -239.6 MB). Peak memory consumption was 253.8 MB. Max. memory is 16.1 GB. * Witness Printer took 68.75 ms. Allocated memory is still 446.7 MB. Free memory was 303.0 MB in the beginning and 299.8 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: 12]: 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: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((x <= 70 && 70 <= x) && y <= 70) && 70 <= y) || (((74 <= x && 74 <= y) && x <= 74) && y <= 74)) || (((y <= 71 && x <= 71) && 71 <= x) && 71 <= y)) || (((x <= 83 && y <= 83) && 83 <= y) && 83 <= x)) || (((y <= 82 && 82 <= y) && x <= 82) && 82 <= x)) || (((96 <= y && x <= 96) && 96 <= x) && y <= 96)) || (((65 <= y && 65 <= x) && x <= 65) && y <= 65)) || (((76 <= x && y <= 76) && 76 <= y) && x <= 76)) || (((85 <= y && 85 <= x) && y <= 85) && x <= 85)) || (((67 <= y && 67 <= x) && x <= 67) && y <= 67)) || (((y <= 57 && 57 <= y) && x <= 57) && 57 <= x)) || (((x <= 80 && y <= 80) && 80 <= y) && 80 <= x)) || (((y <= 89 && x <= 89) && 89 <= y) && 89 <= x)) || (((y <= 88 && 88 <= y) && x <= 88) && 88 <= x)) || (((75 <= x && 75 <= y) && y <= 75) && x <= 75)) || (((y <= 86 && x <= 86) && 86 <= x) && 86 <= y)) || (((y <= 64 && x <= 64) && 64 <= x) && 64 <= y)) || (((79 <= y && x <= 79) && y <= 79) && 79 <= x)) || (((77 <= y && x <= 77) && 77 <= x) && y <= 77)) || (((y <= 63 && 63 <= x) && x <= 63) && 63 <= y)) || ((100 <= x && 99 < y) && y <= 100)) || (((y <= 98 && 98 <= y) && 98 <= x) && x <= 98)) || (((53 <= x && 53 <= y) && y <= 53) && x <= 53)) || (((y <= 78 && x <= 78) && 78 <= y) && 78 <= x)) || (((52 <= x && 52 <= y) && y <= 52) && x <= 52)) || (((60 <= y && x < 61) && y <= 60) && 60 <= x)) || (((99 <= y && x <= 99) && y <= 99) && 99 <= x)) || (((81 <= y && x <= 81) && y <= 81) && 81 <= x)) || (((y <= 68 && x <= 68) && 68 <= y) && 68 <= x)) || ((x < 51 && y <= 50) && 50 <= y)) || (((x <= 87 && 87 <= y) && y <= 87) && 87 <= x)) || (((92 <= y && x <= 92) && y <= 92) && 92 <= x)) || (((y <= 93 && 93 <= x) && x <= 93) && 93 <= y)) || (((x <= 69 && y <= 69) && 69 <= x) && 69 <= y)) || (((y <= 51 && 51 <= y) && x <= 51) && 51 <= x)) || (((90 <= x && x <= 90) && 90 <= y) && y <= 90)) || (((91 <= x && x <= 91) && y <= 91) && 91 <= y)) || (((y <= 56 && 56 <= y) && x < 57) && 56 <= x)) || (((94 <= x && x <= 94) && y <= 94) && 94 <= y)) || (((97 <= x && y <= 97) && 97 <= y) && x <= 97)) || (((55 <= y && 55 <= x) && x <= 55) && y <= 55)) || (((58 <= x && 58 <= y) && y <= 58) && x < 59)) || (((y <= 72 && 72 <= y) && 72 <= x) && x <= 72)) || (((95 <= x && y <= 95) && 95 <= y) && x <= 95)) || (((x <= 73 && 73 <= x) && 73 <= y) && y <= 73)) || (((y <= 54 && x < 55) && 54 <= y) && 54 <= x)) || (((62 <= x && x <= 62) && 62 <= y) && y <= 62)) || (((x <= 66 && 66 <= x) && y <= 66) && 66 <= y)) || (((y <= 59 && x <= 59) && 59 <= x) && 59 <= y)) || (((x < 62 && y <= 61) && 61 <= x) && 61 <= y)) || (((x <= 84 && 84 <= y) && y <= 84) && 84 <= x) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 144.0s, OverallIterations: 60, TraceHistogramMax: 101, AutomataDifference: 20.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 619 SDtfs, 1345 SDslu, 12842 SDs, 0 SdLazy, 9761 SolverSat, 1831 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7319 GetRequests, 5042 SyntacticMatches, 7 SemanticMatches, 2270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 97.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=211occurred in iteration=59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 60 MinimizatonAttempts, 2671 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 660 HoareAnnotationTreeSize, 3 FomulaSimplifications, 15405 FormulaSimplificationTreeSizeReduction, 1.4s HoareSimplificationTime, 3 FomulaSimplificationsInter, 420 FormulaSimplificationTreeSizeReductionInter, 3.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 103.1s InterpolantComputationTime, 10578 NumberOfCodeBlocks, 10218 NumberOfCodeBlocksAsserted, 1129 NumberOfCheckSat, 10462 ConstructedInterpolants, 0 QuantifiedInterpolants, 3595091 SizeOfPredicates, 27 NumberOfNonLiveVariables, 12314 ConjunctsInSsa, 1649 ConjunctsInUnsatCore, 116 InterpolantComputations, 4 PerfectInterpolantSequences, 107648/293403 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...