./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de42.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX --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 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:41:55,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:41:55,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:41:55,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:41:55,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:41:55,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:41:55,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:41:55,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:41:55,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:41:55,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:41:55,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:41:55,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:41:55,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:41:55,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:41:55,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:41:55,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:41:55,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:41:55,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:41:55,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:41:55,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:41:55,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:41:55,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:41:55,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:41:55,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:41:55,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:41:55,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:41:55,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:41:55,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:41:55,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:41:55,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:41:55,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:41:55,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:41:55,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:41:55,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:41:55,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:41:55,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:41:55,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:41:55,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:41:55,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:41:55,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:41:55,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:41:55,389 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:41:55,429 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:41:55,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:41:55,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:41:55,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:41:55,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:41:55,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:41:55,431 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:41:55,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:41:55,432 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:41:55,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:41:55,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:41:55,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:41:55,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:41:55,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:41:55,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:41:55,433 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:41:55,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:41:55,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:41:55,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:41:55,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:41:55,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:41:55,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:41:55,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:41:55,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:41:55,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:41:55,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:41:55,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:41:55,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:41:55,437 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:41:55,437 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:41:55,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:41:55,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:41:55,437 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_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 [2021-11-09 10:41:55,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:41:55,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:41:55,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:41:55,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:41:55,763 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:41:55,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loops-crafted-1/in-de42.c [2021-11-09 10:41:55,878 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/data/d6a69a6d2/48b7979d61c74794a477b42138ca605b/FLAGa34a8217a [2021-11-09 10:41:56,465 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:41:56,466 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/sv-benchmarks/c/loops-crafted-1/in-de42.c [2021-11-09 10:41:56,473 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/data/d6a69a6d2/48b7979d61c74794a477b42138ca605b/FLAGa34a8217a [2021-11-09 10:41:56,806 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/data/d6a69a6d2/48b7979d61c74794a477b42138ca605b [2021-11-09 10:41:56,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:41:56,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:41:56,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:41:56,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:41:56,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:41:56,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:41:56" (1/1) ... [2021-11-09 10:41:56,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e25dba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:56, skipping insertion in model container [2021-11-09 10:41:56,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:41:56" (1/1) ... [2021-11-09 10:41:56,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:41:56,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:41:57,070 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2021-11-09 10:41:57,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:41:57,103 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:41:57,130 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2021-11-09 10:41:57,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:41:57,162 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:41:57,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57 WrapperNode [2021-11-09 10:41:57,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:41:57,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:41:57,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:41:57,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:41:57,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57" (1/1) ... [2021-11-09 10:41:57,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57" (1/1) ... [2021-11-09 10:41:57,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:41:57,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:41:57,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:41:57,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:41:57,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57" (1/1) ... [2021-11-09 10:41:57,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57" (1/1) ... [2021-11-09 10:41:57,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57" (1/1) ... [2021-11-09 10:41:57,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57" (1/1) ... [2021-11-09 10:41:57,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57" (1/1) ... [2021-11-09 10:41:57,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57" (1/1) ... [2021-11-09 10:41:57,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57" (1/1) ... [2021-11-09 10:41:57,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:41:57,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:41:57,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:41:57,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:41:57,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57" (1/1) ... [2021-11-09 10:41:57,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:41:57,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:41:57,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:41:57,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:41:57,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:41:57,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:41:57,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:41:57,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:41:57,712 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:41:57,712 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-09 10:41:57,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:41:57 BoogieIcfgContainer [2021-11-09 10:41:57,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:41:57,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:41:57,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:41:57,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:41:57,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:41:56" (1/3) ... [2021-11-09 10:41:57,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662d91a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:41:57, skipping insertion in model container [2021-11-09 10:41:57,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:41:57" (2/3) ... [2021-11-09 10:41:57,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662d91a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:41:57, skipping insertion in model container [2021-11-09 10:41:57,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:41:57" (3/3) ... [2021-11-09 10:41:57,754 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de42.c [2021-11-09 10:41:57,760 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:41:57,760 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:41:57,852 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:41:57,861 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 10:41:57,861 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:41:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:41:57,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:57,892 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:57,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:57,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2021-11-09 10:41:57,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:57,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593728325] [2021-11-09 10:41:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:57,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:58,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:58,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593728325] [2021-11-09 10:41:58,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593728325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:41:58,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:41:58,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:41:58,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429416493] [2021-11-09 10:41:58,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:41:58,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:58,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:41:58,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:41:58,122 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:58,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:58,139 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2021-11-09 10:41:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:41:58,141 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-09 10:41:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:58,162 INFO L225 Difference]: With dead ends: 27 [2021-11-09 10:41:58,162 INFO L226 Difference]: Without dead ends: 11 [2021-11-09 10:41:58,167 INFO L786 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 [2021-11-09 10:41:58,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-09 10:41:58,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-09 10:41:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-11-09 10:41:58,209 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2021-11-09 10:41:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:58,211 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-11-09 10:41:58,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-11-09 10:41:58,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:41:58,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:58,214 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:58,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:41:58,215 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2021-11-09 10:41:58,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:58,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149271628] [2021-11-09 10:41:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:58,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:58,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:58,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149271628] [2021-11-09 10:41:58,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149271628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:41:58,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:41:58,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 10:41:58,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212620770] [2021-11-09 10:41:58,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:41:58,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:58,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:41:58,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:41:58,909 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:59,120 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-11-09 10:41:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:41:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-09 10:41:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:59,122 INFO L225 Difference]: With dead ends: 29 [2021-11-09 10:41:59,122 INFO L226 Difference]: Without dead ends: 21 [2021-11-09 10:41:59,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:41:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-09 10:41:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-11-09 10:41:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-11-09 10:41:59,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 10 [2021-11-09 10:41:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:59,130 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-11-09 10:41:59,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-11-09 10:41:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:41:59,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:59,132 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:59,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:41:59,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:59,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:59,134 INFO L85 PathProgramCache]: Analyzing trace with hash 105287507, now seen corresponding path program 1 times [2021-11-09 10:41:59,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:59,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052003876] [2021-11-09 10:41:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:59,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:59,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:59,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052003876] [2021-11-09 10:41:59,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052003876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:41:59,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:41:59,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:41:59,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74142338] [2021-11-09 10:41:59,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:41:59,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:59,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:41:59,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:41:59,189 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:59,202 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-11-09 10:41:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:41:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-09 10:41:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:59,204 INFO L225 Difference]: With dead ends: 30 [2021-11-09 10:41:59,205 INFO L226 Difference]: Without dead ends: 21 [2021-11-09 10:41:59,205 INFO L786 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 [2021-11-09 10:41:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-09 10:41:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2021-11-09 10:41:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-11-09 10:41:59,211 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 11 [2021-11-09 10:41:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:59,211 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-11-09 10:41:59,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-11-09 10:41:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:41:59,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:59,213 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:59,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:41:59,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:59,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1508115906, now seen corresponding path program 1 times [2021-11-09 10:41:59,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:59,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970207887] [2021-11-09 10:41:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:59,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:59,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:59,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970207887] [2021-11-09 10:41:59,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970207887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:41:59,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:41:59,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:41:59,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542106691] [2021-11-09 10:41:59,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:41:59,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:59,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:41:59,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:41:59,290 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:59,332 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-11-09 10:41:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:41:59,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-09 10:41:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:59,335 INFO L225 Difference]: With dead ends: 21 [2021-11-09 10:41:59,335 INFO L226 Difference]: Without dead ends: 12 [2021-11-09 10:41:59,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:41:59,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-09 10:41:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-09 10:41:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-11-09 10:41:59,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 11 [2021-11-09 10:41:59,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:59,343 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-11-09 10:41:59,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,344 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-11-09 10:41:59,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:41:59,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:59,345 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:59,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:41:59,346 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:59,351 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2021-11-09 10:41:59,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:59,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716835801] [2021-11-09 10:41:59,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:59,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:59,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:59,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716835801] [2021-11-09 10:41:59,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716835801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:59,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123213211] [2021-11-09 10:41:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:59,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:59,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:41:59,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:41:59,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:41:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:41:59,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:59,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123213211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:59,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:59,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-09 10:41:59,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419275344] [2021-11-09 10:41:59,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:41:59,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:59,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:41:59,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:41:59,723 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:59,798 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-09 10:41:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:41:59,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-09 10:41:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:59,801 INFO L225 Difference]: With dead ends: 29 [2021-11-09 10:41:59,801 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 10:41:59,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:41:59,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 10:41:59,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-11-09 10:41:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-11-09 10:41:59,813 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 11 [2021-11-09 10:41:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:59,813 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-11-09 10:41:59,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-11-09 10:41:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 10:41:59,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:59,815 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:59,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:00,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:00,030 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:00,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash -566394372, now seen corresponding path program 2 times [2021-11-09 10:42:00,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:00,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976244787] [2021-11-09 10:42:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:00,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:00,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:00,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976244787] [2021-11-09 10:42:00,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976244787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:00,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540913576] [2021-11-09 10:42:00,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:00,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:00,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:00,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:00,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:42:00,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:00,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:00,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:42:00,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:00,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540913576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:00,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:00,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 10:42:00,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5163866] [2021-11-09 10:42:00,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:42:00,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:00,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:42:00,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:42:00,380 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:00,463 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-11-09 10:42:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:42:00,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 10:42:00,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:00,467 INFO L225 Difference]: With dead ends: 36 [2021-11-09 10:42:00,467 INFO L226 Difference]: Without dead ends: 30 [2021-11-09 10:42:00,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:42:00,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-09 10:42:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-11-09 10:42:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-09 10:42:00,485 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2021-11-09 10:42:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:00,485 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-09 10:42:00,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-09 10:42:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 10:42:00,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:00,487 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:00,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:00,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 10:42:00,704 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2021-11-09 10:42:00,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:00,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42547954] [2021-11-09 10:42:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:00,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:42:00,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:00,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42547954] [2021-11-09 10:42:00,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42547954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:00,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917817173] [2021-11-09 10:42:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:00,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:00,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:00,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:00,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:42:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:00,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:42:00,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:42:01,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917817173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:01,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:01,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-09 10:42:01,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241310970] [2021-11-09 10:42:01,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:42:01,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:01,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:42:01,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:42:01,041 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:01,080 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-09 10:42:01,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:42:01,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 10:42:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:01,084 INFO L225 Difference]: With dead ends: 38 [2021-11-09 10:42:01,084 INFO L226 Difference]: Without dead ends: 34 [2021-11-09 10:42:01,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:42:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-09 10:42:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-11-09 10:42:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2021-11-09 10:42:01,096 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 13 [2021-11-09 10:42:01,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:01,097 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2021-11-09 10:42:01,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2021-11-09 10:42:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 10:42:01,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:01,099 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:01,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:01,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:01,315 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:01,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:01,315 INFO L85 PathProgramCache]: Analyzing trace with hash 486922401, now seen corresponding path program 3 times [2021-11-09 10:42:01,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:01,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635031339] [2021-11-09 10:42:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:01,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:01,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:01,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635031339] [2021-11-09 10:42:01,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635031339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:01,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632792231] [2021-11-09 10:42:01,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:01,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:01,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:01,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:01,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:42:01,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:42:01,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:01,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 10:42:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:01,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632792231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:01,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:01,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-09 10:42:01,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976564352] [2021-11-09 10:42:01,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:42:01,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:01,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:42:01,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:42:01,722 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:01,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:01,839 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2021-11-09 10:42:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:42:01,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 10:42:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:01,845 INFO L225 Difference]: With dead ends: 59 [2021-11-09 10:42:01,845 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 10:42:01,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:42:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 10:42:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2021-11-09 10:42:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2021-11-09 10:42:01,859 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 13 [2021-11-09 10:42:01,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:01,860 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2021-11-09 10:42:01,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2021-11-09 10:42:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 10:42:01,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:01,862 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:01,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:02,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:02,081 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2021-11-09 10:42:02,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:02,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122903986] [2021-11-09 10:42:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:02,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:02,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:02,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122903986] [2021-11-09 10:42:02,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122903986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:02,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096894341] [2021-11-09 10:42:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:02,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:02,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:02,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:02,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:42:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 10:42:02,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:03,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096894341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:03,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:03,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-09 10:42:03,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066890503] [2021-11-09 10:42:03,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 10:42:03,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:03,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 10:42:03,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:42:03,448 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:03,751 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2021-11-09 10:42:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:42:03,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-09 10:42:03,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:03,752 INFO L225 Difference]: With dead ends: 52 [2021-11-09 10:42:03,753 INFO L226 Difference]: Without dead ends: 42 [2021-11-09 10:42:03,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:42:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-09 10:42:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-09 10:42:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2021-11-09 10:42:03,760 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 14 [2021-11-09 10:42:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:03,761 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2021-11-09 10:42:03,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2021-11-09 10:42:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 10:42:03,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:03,763 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:03,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:03,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 10:42:03,967 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:03,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 4 times [2021-11-09 10:42:03,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:03,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610348579] [2021-11-09 10:42:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:03,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:04,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:04,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610348579] [2021-11-09 10:42:04,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610348579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:04,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621121049] [2021-11-09 10:42:04,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:04,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:04,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:04,097 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:04,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:42:04,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:04,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:04,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 10:42:04,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:04,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621121049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:04,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:04,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-09 10:42:04,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452606210] [2021-11-09 10:42:04,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:42:04,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:04,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:42:04,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:42:04,313 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:04,465 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2021-11-09 10:42:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:42:04,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-09 10:42:04,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:04,466 INFO L225 Difference]: With dead ends: 70 [2021-11-09 10:42:04,467 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 10:42:04,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:42:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 10:42:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-11-09 10:42:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-11-09 10:42:04,488 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 14 [2021-11-09 10:42:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:04,488 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-11-09 10:42:04,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-11-09 10:42:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 10:42:04,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:04,492 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:04,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:04,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:04,693 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash -555035246, now seen corresponding path program 2 times [2021-11-09 10:42:04,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:04,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72855730] [2021-11-09 10:42:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:04,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:42:04,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:04,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72855730] [2021-11-09 10:42:04,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72855730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:04,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551071859] [2021-11-09 10:42:04,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:04,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:04,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:04,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:04,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:42:04,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:04,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:04,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:42:04,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:42:04,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551071859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:04,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:04,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-09 10:42:04,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493917025] [2021-11-09 10:42:04,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:42:04,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:04,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:42:04,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:42:04,935 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:04,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:04,957 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-11-09 10:42:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:42:04,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-09 10:42:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:04,959 INFO L225 Difference]: With dead ends: 56 [2021-11-09 10:42:04,959 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 10:42:04,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:42:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 10:42:04,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-09 10:42:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2021-11-09 10:42:04,965 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 15 [2021-11-09 10:42:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:04,966 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2021-11-09 10:42:04,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2021-11-09 10:42:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 10:42:04,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:04,967 INFO L513 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:05,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:05,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 10:42:05,182 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:05,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1700108289, now seen corresponding path program 5 times [2021-11-09 10:42:05,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:05,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084767022] [2021-11-09 10:42:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:05,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:05,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:05,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084767022] [2021-11-09 10:42:05,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084767022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:05,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055631644] [2021-11-09 10:42:05,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:05,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:05,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:05,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:42:05,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 10:42:05,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:05,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 10:42:05,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:05,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055631644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:05,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:05,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 10:42:05,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673738895] [2021-11-09 10:42:05,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:42:05,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:05,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:42:05,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:42:05,527 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:05,674 INFO L93 Difference]: Finished difference Result 78 states and 113 transitions. [2021-11-09 10:42:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:42:05,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-09 10:42:05,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:05,676 INFO L225 Difference]: With dead ends: 78 [2021-11-09 10:42:05,676 INFO L226 Difference]: Without dead ends: 68 [2021-11-09 10:42:05,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:42:05,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-09 10:42:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2021-11-09 10:42:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-11-09 10:42:05,683 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 15 [2021-11-09 10:42:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:05,683 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-11-09 10:42:05,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:05,684 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-11-09 10:42:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 10:42:05,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:05,685 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:05,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-09 10:42:05,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 10:42:05,886 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:05,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 3 times [2021-11-09 10:42:05,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:05,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172352049] [2021-11-09 10:42:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:05,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 10:42:05,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:05,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172352049] [2021-11-09 10:42:05,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172352049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:05,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600119620] [2021-11-09 10:42:05,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:05,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:05,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:05,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:06,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:42:06,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 10:42:06,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:06,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 10:42:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 10:42:06,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600119620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:06,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:06,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-09 10:42:06,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66189914] [2021-11-09 10:42:06,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:42:06,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:06,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:42:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:42:06,230 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:06,306 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2021-11-09 10:42:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:42:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 10:42:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:06,308 INFO L225 Difference]: With dead ends: 68 [2021-11-09 10:42:06,308 INFO L226 Difference]: Without dead ends: 59 [2021-11-09 10:42:06,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:42:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-09 10:42:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-11-09 10:42:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2021-11-09 10:42:06,315 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 16 [2021-11-09 10:42:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:06,316 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2021-11-09 10:42:06,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:06,316 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2021-11-09 10:42:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 10:42:06,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:06,317 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:06,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:06,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 10:42:06,538 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash 720326044, now seen corresponding path program 2 times [2021-11-09 10:42:06,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:06,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642397031] [2021-11-09 10:42:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:06,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:42:06,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:06,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642397031] [2021-11-09 10:42:06,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642397031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:06,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249230289] [2021-11-09 10:42:06,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:06,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:06,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:06,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:06,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:42:06,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:06,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:06,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:42:06,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:42:06,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249230289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:06,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:06,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-11-09 10:42:06,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83228918] [2021-11-09 10:42:06,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:42:06,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:06,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:42:06,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:42:06,917 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:06,993 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2021-11-09 10:42:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:42:06,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 10:42:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:06,995 INFO L225 Difference]: With dead ends: 71 [2021-11-09 10:42:06,995 INFO L226 Difference]: Without dead ends: 67 [2021-11-09 10:42:06,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:42:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-09 10:42:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-11-09 10:42:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.390625) internal successors, (89), 64 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-11-09 10:42:07,010 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 16 [2021-11-09 10:42:07,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:07,011 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-11-09 10:42:07,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:07,011 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-11-09 10:42:07,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 10:42:07,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:07,013 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:07,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:07,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 10:42:07,230 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:07,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:07,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2029028156, now seen corresponding path program 6 times [2021-11-09 10:42:07,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:07,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761804162] [2021-11-09 10:42:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:07,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:07,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:07,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761804162] [2021-11-09 10:42:07,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761804162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:07,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060470948] [2021-11-09 10:42:07,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:42:07,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:07,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:07,386 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:07,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:42:07,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 10:42:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 10:42:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:07,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060470948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:07,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:07,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-09 10:42:07,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243881488] [2021-11-09 10:42:07,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:42:07,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:07,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:42:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:42:07,654 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:07,828 INFO L93 Difference]: Finished difference Result 114 states and 168 transitions. [2021-11-09 10:42:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:42:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 10:42:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:07,830 INFO L225 Difference]: With dead ends: 114 [2021-11-09 10:42:07,830 INFO L226 Difference]: Without dead ends: 101 [2021-11-09 10:42:07,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:42:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-09 10:42:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2021-11-09 10:42:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 73 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2021-11-09 10:42:07,839 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 16 [2021-11-09 10:42:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:07,840 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2021-11-09 10:42:07,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2021-11-09 10:42:07,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 10:42:07,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:07,841 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:07,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:08,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:08,062 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:08,062 INFO L85 PathProgramCache]: Analyzing trace with hash 400549314, now seen corresponding path program 3 times [2021-11-09 10:42:08,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:08,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336052928] [2021-11-09 10:42:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:08,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:42:08,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:08,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336052928] [2021-11-09 10:42:08,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336052928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:08,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670072680] [2021-11-09 10:42:08,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:08,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:08,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:08,168 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:08,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:42:08,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:42:08,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:08,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:42:08,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:42:08,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670072680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:08,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:08,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-09 10:42:08,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222753784] [2021-11-09 10:42:08,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:42:08,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:08,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:42:08,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:42:08,575 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:08,676 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2021-11-09 10:42:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:42:08,677 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-09 10:42:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:08,678 INFO L225 Difference]: With dead ends: 92 [2021-11-09 10:42:08,678 INFO L226 Difference]: Without dead ends: 83 [2021-11-09 10:42:08,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:42:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-09 10:42:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2021-11-09 10:42:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.375) internal successors, (99), 72 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2021-11-09 10:42:08,702 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 17 [2021-11-09 10:42:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:08,702 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2021-11-09 10:42:08,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2021-11-09 10:42:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 10:42:08,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:08,706 INFO L513 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:08,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-09 10:42:08,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:08,911 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:08,912 INFO L85 PathProgramCache]: Analyzing trace with hash -659357855, now seen corresponding path program 7 times [2021-11-09 10:42:08,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:08,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219514727] [2021-11-09 10:42:08,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:08,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:09,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:09,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219514727] [2021-11-09 10:42:09,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219514727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:09,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221617838] [2021-11-09 10:42:09,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:42:09,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:09,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:09,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:09,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:42:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:09,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:42:09,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:09,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221617838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:09,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:09,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 10:42:09,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422320550] [2021-11-09 10:42:09,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:42:09,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:42:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:42:09,376 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:09,598 INFO L93 Difference]: Finished difference Result 125 states and 184 transitions. [2021-11-09 10:42:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:42:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-09 10:42:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:09,600 INFO L225 Difference]: With dead ends: 125 [2021-11-09 10:42:09,600 INFO L226 Difference]: Without dead ends: 112 [2021-11-09 10:42:09,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:42:09,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-09 10:42:09,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 82. [2021-11-09 10:42:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.382716049382716) internal successors, (112), 81 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2021-11-09 10:42:09,608 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 112 transitions. Word has length 17 [2021-11-09 10:42:09,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:09,608 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 112 transitions. [2021-11-09 10:42:09,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:09,609 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 112 transitions. [2021-11-09 10:42:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 10:42:09,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:09,616 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:09,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:09,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 10:42:09,822 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:09,822 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 4 times [2021-11-09 10:42:09,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:09,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007542787] [2021-11-09 10:42:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:09,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:10,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:10,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007542787] [2021-11-09 10:42:10,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007542787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:10,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252041901] [2021-11-09 10:42:10,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:10,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:10,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:10,238 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:10,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:42:10,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:10,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:10,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 10:42:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:11,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252041901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:11,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:11,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-11-09 10:42:11,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211386161] [2021-11-09 10:42:11,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:42:11,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:11,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:42:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:42:11,639 INFO L87 Difference]: Start difference. First operand 82 states and 112 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:12,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:12,093 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2021-11-09 10:42:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:42:12,094 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 10:42:12,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:12,094 INFO L225 Difference]: With dead ends: 95 [2021-11-09 10:42:12,094 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 10:42:12,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:42:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 10:42:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-09 10:42:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 77 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 107 transitions. [2021-11-09 10:42:12,102 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 107 transitions. Word has length 18 [2021-11-09 10:42:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:12,103 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 107 transitions. [2021-11-09 10:42:12,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:12,104 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 107 transitions. [2021-11-09 10:42:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 10:42:12,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:12,105 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:12,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-09 10:42:12,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 10:42:12,310 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:12,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1787271340, now seen corresponding path program 5 times [2021-11-09 10:42:12,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:12,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300496860] [2021-11-09 10:42:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:12,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 10:42:12,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:12,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300496860] [2021-11-09 10:42:12,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300496860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:12,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495551909] [2021-11-09 10:42:12,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:12,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:12,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:12,426 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:12,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 10:42:12,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 10:42:12,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:12,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 10:42:12,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 10:42:12,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495551909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:12,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:12,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-09 10:42:12,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544690329] [2021-11-09 10:42:12,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:42:12,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:12,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:42:12,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:42:12,803 INFO L87 Difference]: Start difference. First operand 78 states and 107 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:12,905 INFO L93 Difference]: Finished difference Result 103 states and 131 transitions. [2021-11-09 10:42:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:42:12,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 10:42:12,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:12,911 INFO L225 Difference]: With dead ends: 103 [2021-11-09 10:42:12,911 INFO L226 Difference]: Without dead ends: 93 [2021-11-09 10:42:12,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:42:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-09 10:42:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2021-11-09 10:42:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 77 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 106 transitions. [2021-11-09 10:42:12,923 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 106 transitions. Word has length 18 [2021-11-09 10:42:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:12,923 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 106 transitions. [2021-11-09 10:42:12,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 106 transitions. [2021-11-09 10:42:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 10:42:12,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:12,925 INFO L513 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:12,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:13,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:13,134 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:13,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:13,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1900021724, now seen corresponding path program 8 times [2021-11-09 10:42:13,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:13,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357857770] [2021-11-09 10:42:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:13,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:13,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:13,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357857770] [2021-11-09 10:42:13,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357857770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:13,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729816581] [2021-11-09 10:42:13,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:13,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:13,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:13,313 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:13,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:42:13,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:13,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 10:42:13,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:13,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729816581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:13,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:13,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-09 10:42:13,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891234763] [2021-11-09 10:42:13,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:42:13,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:13,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:42:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:42:13,638 INFO L87 Difference]: Start difference. First operand 78 states and 106 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:13,881 INFO L93 Difference]: Finished difference Result 133 states and 197 transitions. [2021-11-09 10:42:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:42:13,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 10:42:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:13,882 INFO L225 Difference]: With dead ends: 133 [2021-11-09 10:42:13,882 INFO L226 Difference]: Without dead ends: 120 [2021-11-09 10:42:13,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:42:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-09 10:42:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 87. [2021-11-09 10:42:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 86 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2021-11-09 10:42:13,892 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 18 [2021-11-09 10:42:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:13,892 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2021-11-09 10:42:13,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2021-11-09 10:42:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 10:42:13,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:13,894 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:13,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:14,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:14,106 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:14,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1610400402, now seen corresponding path program 4 times [2021-11-09 10:42:14,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:14,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596233975] [2021-11-09 10:42:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:14,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:42:14,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:14,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596233975] [2021-11-09 10:42:14,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596233975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:14,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825712021] [2021-11-09 10:42:14,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:14,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:14,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:14,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:14,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 10:42:14,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:14,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:14,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 10:42:14,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:42:14,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825712021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:14,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:14,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-11-09 10:42:14,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084802818] [2021-11-09 10:42:14,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:42:14,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:14,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:42:14,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:42:14,576 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:14,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:14,703 INFO L93 Difference]: Finished difference Result 114 states and 159 transitions. [2021-11-09 10:42:14,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:42:14,704 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 10:42:14,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:14,705 INFO L225 Difference]: With dead ends: 114 [2021-11-09 10:42:14,705 INFO L226 Difference]: Without dead ends: 110 [2021-11-09 10:42:14,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:42:14,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-09 10:42:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2021-11-09 10:42:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.3942307692307692) internal successors, (145), 104 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:14,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-11-09 10:42:14,717 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 19 [2021-11-09 10:42:14,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:14,717 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-11-09 10:42:14,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:14,718 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-11-09 10:42:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 10:42:14,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:14,719 INFO L513 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:14,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:14,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 10:42:14,938 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:14,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:14,938 INFO L85 PathProgramCache]: Analyzing trace with hash -363589951, now seen corresponding path program 9 times [2021-11-09 10:42:14,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:14,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993472743] [2021-11-09 10:42:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:14,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:15,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:15,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993472743] [2021-11-09 10:42:15,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993472743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:15,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032193230] [2021-11-09 10:42:15,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:15,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:15,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:15,136 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:15,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 10:42:15,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:42:15,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:15,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:42:15,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:15,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032193230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:15,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:15,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-09 10:42:15,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370568403] [2021-11-09 10:42:15,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:42:15,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:42:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:42:15,608 INFO L87 Difference]: Start difference. First operand 105 states and 145 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:15,905 INFO L93 Difference]: Finished difference Result 177 states and 268 transitions. [2021-11-09 10:42:15,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:42:15,909 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 10:42:15,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:15,910 INFO L225 Difference]: With dead ends: 177 [2021-11-09 10:42:15,910 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 10:42:15,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:42:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 10:42:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 116. [2021-11-09 10:42:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4) internal successors, (161), 115 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 161 transitions. [2021-11-09 10:42:15,922 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 161 transitions. Word has length 19 [2021-11-09 10:42:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:15,923 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 161 transitions. [2021-11-09 10:42:15,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 161 transitions. [2021-11-09 10:42:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:42:15,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:15,924 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:15,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:16,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:16,134 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:16,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:16,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 6 times [2021-11-09 10:42:16,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:16,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979942348] [2021-11-09 10:42:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:16,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 10:42:16,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:16,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979942348] [2021-11-09 10:42:16,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979942348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:16,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723137039] [2021-11-09 10:42:16,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:42:16,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:16,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:16,258 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:16,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 10:42:16,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 10:42:16,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 10:42:16,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 10:42:16,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723137039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:16,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:16,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-09 10:42:16,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149890229] [2021-11-09 10:42:16,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:42:16,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:16,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:42:16,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:42:16,698 INFO L87 Difference]: Start difference. First operand 116 states and 161 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:16,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:16,774 INFO L93 Difference]: Finished difference Result 143 states and 188 transitions. [2021-11-09 10:42:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:42:16,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 10:42:16,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:16,776 INFO L225 Difference]: With dead ends: 143 [2021-11-09 10:42:16,777 INFO L226 Difference]: Without dead ends: 132 [2021-11-09 10:42:16,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:42:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-09 10:42:16,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 116. [2021-11-09 10:42:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.391304347826087) internal successors, (160), 115 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 160 transitions. [2021-11-09 10:42:16,789 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 160 transitions. Word has length 20 [2021-11-09 10:42:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:16,789 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 160 transitions. [2021-11-09 10:42:16,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 160 transitions. [2021-11-09 10:42:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:42:16,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:16,791 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:16,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-09 10:42:17,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:17,018 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash 58767374, now seen corresponding path program 5 times [2021-11-09 10:42:17,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:17,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61883963] [2021-11-09 10:42:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:17,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:42:17,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:17,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61883963] [2021-11-09 10:42:17,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61883963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:17,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332715021] [2021-11-09 10:42:17,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:17,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:17,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:17,162 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:17,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 10:42:17,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 10:42:17,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:17,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 10:42:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:42:17,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332715021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:17,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:17,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-09 10:42:17,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965784775] [2021-11-09 10:42:17,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:42:17,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:17,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:42:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:42:17,657 INFO L87 Difference]: Start difference. First operand 116 states and 160 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:17,812 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2021-11-09 10:42:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:42:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 10:42:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:17,813 INFO L225 Difference]: With dead ends: 137 [2021-11-09 10:42:17,814 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 10:42:17,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:42:17,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 10:42:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-09 10:42:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.3771929824561404) internal successors, (157), 114 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 157 transitions. [2021-11-09 10:42:17,825 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 157 transitions. Word has length 20 [2021-11-09 10:42:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:17,825 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 157 transitions. [2021-11-09 10:42:17,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:17,826 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 157 transitions. [2021-11-09 10:42:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:42:17,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:17,827 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:17,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:18,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 10:42:18,050 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:18,050 INFO L85 PathProgramCache]: Analyzing trace with hash -477154692, now seen corresponding path program 7 times [2021-11-09 10:42:18,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:18,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437730525] [2021-11-09 10:42:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:18,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:42:18,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:18,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437730525] [2021-11-09 10:42:18,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437730525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:18,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443891681] [2021-11-09 10:42:18,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:42:18,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:18,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:18,160 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:18,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 10:42:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:18,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 10:42:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:42:18,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443891681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:18,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:18,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 10:42:18,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673215969] [2021-11-09 10:42:18,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:42:18,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:42:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:42:18,591 INFO L87 Difference]: Start difference. First operand 115 states and 157 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:18,724 INFO L93 Difference]: Finished difference Result 149 states and 190 transitions. [2021-11-09 10:42:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:42:18,725 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 10:42:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:18,726 INFO L225 Difference]: With dead ends: 149 [2021-11-09 10:42:18,726 INFO L226 Difference]: Without dead ends: 138 [2021-11-09 10:42:18,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:42:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-09 10:42:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2021-11-09 10:42:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.368421052631579) internal successors, (156), 114 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 156 transitions. [2021-11-09 10:42:18,738 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 156 transitions. Word has length 20 [2021-11-09 10:42:18,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:18,738 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 156 transitions. [2021-11-09 10:42:18,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 156 transitions. [2021-11-09 10:42:18,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:42:18,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:18,740 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:18,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:18,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:18,966 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1816075140, now seen corresponding path program 10 times [2021-11-09 10:42:18,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:18,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681611313] [2021-11-09 10:42:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:18,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:19,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:19,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681611313] [2021-11-09 10:42:19,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681611313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:19,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959000781] [2021-11-09 10:42:19,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:19,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:19,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:19,186 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:19,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 10:42:19,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:42:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:19,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959000781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:19,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:19,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-09 10:42:19,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381318257] [2021-11-09 10:42:19,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:42:19,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:19,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:42:19,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:42:19,596 INFO L87 Difference]: Start difference. First operand 115 states and 156 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:19,929 INFO L93 Difference]: Finished difference Result 191 states and 287 transitions. [2021-11-09 10:42:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:42:19,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 10:42:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:19,931 INFO L225 Difference]: With dead ends: 191 [2021-11-09 10:42:19,931 INFO L226 Difference]: Without dead ends: 176 [2021-11-09 10:42:19,932 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:42:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-09 10:42:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2021-11-09 10:42:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.376) internal successors, (172), 125 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 172 transitions. [2021-11-09 10:42:19,942 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 172 transitions. Word has length 20 [2021-11-09 10:42:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:19,942 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 172 transitions. [2021-11-09 10:42:19,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 172 transitions. [2021-11-09 10:42:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 10:42:19,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:19,943 INFO L513 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:19,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:20,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 10:42:20,144 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash 401524257, now seen corresponding path program 11 times [2021-11-09 10:42:20,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:20,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363784045] [2021-11-09 10:42:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:20,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:20,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:20,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363784045] [2021-11-09 10:42:20,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363784045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:20,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534663065] [2021-11-09 10:42:20,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:20,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:20,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:20,391 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:20,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 10:42:21,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 10:42:21,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:21,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:42:21,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:21,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534663065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:21,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:21,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-11-09 10:42:21,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295177136] [2021-11-09 10:42:21,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:42:21,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:21,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:42:21,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:42:21,374 INFO L87 Difference]: Start difference. First operand 126 states and 172 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:21,735 INFO L93 Difference]: Finished difference Result 206 states and 311 transitions. [2021-11-09 10:42:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:42:21,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 10:42:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:21,738 INFO L225 Difference]: With dead ends: 206 [2021-11-09 10:42:21,738 INFO L226 Difference]: Without dead ends: 191 [2021-11-09 10:42:21,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:42:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-09 10:42:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 137. [2021-11-09 10:42:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3823529411764706) internal successors, (188), 136 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 188 transitions. [2021-11-09 10:42:21,753 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 188 transitions. Word has length 21 [2021-11-09 10:42:21,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:21,754 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 188 transitions. [2021-11-09 10:42:21,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 188 transitions. [2021-11-09 10:42:21,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:42:21,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:21,756 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:21,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:21,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 10:42:21,961 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:21,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 8 times [2021-11-09 10:42:21,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:21,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77575215] [2021-11-09 10:42:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:21,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:22,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:22,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77575215] [2021-11-09 10:42:22,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77575215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:22,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186637305] [2021-11-09 10:42:22,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:22,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:22,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:22,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:22,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 10:42:22,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:22,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 10:42:22,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:23,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186637305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:23,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:23,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 32 [2021-11-09 10:42:23,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216764318] [2021-11-09 10:42:23,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 10:42:23,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:23,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 10:42:23,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:42:23,889 INFO L87 Difference]: Start difference. First operand 137 states and 188 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:24,638 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2021-11-09 10:42:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:42:24,639 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 10:42:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:24,640 INFO L225 Difference]: With dead ends: 152 [2021-11-09 10:42:24,640 INFO L226 Difference]: Without dead ends: 132 [2021-11-09 10:42:24,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:42:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-09 10:42:24,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-11-09 10:42:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.3893129770992367) internal successors, (182), 131 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 182 transitions. [2021-11-09 10:42:24,652 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 182 transitions. Word has length 22 [2021-11-09 10:42:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:24,652 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 182 transitions. [2021-11-09 10:42:24,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 182 transitions. [2021-11-09 10:42:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:42:24,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:24,654 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:24,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:24,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 10:42:24,859 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash -657739300, now seen corresponding path program 9 times [2021-11-09 10:42:24,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:24,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970450491] [2021-11-09 10:42:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:24,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 10:42:25,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:25,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970450491] [2021-11-09 10:42:25,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970450491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:25,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353707627] [2021-11-09 10:42:25,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:25,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:25,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:25,018 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:25,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 10:42:25,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:42:25,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:25,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:42:25,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 10:42:25,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353707627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:25,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:25,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-11-09 10:42:25,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517039911] [2021-11-09 10:42:25,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:42:25,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:25,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:42:25,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:42:25,590 INFO L87 Difference]: Start difference. First operand 132 states and 182 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:25,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:25,705 INFO L93 Difference]: Finished difference Result 162 states and 212 transitions. [2021-11-09 10:42:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:42:25,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 10:42:25,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:25,707 INFO L225 Difference]: With dead ends: 162 [2021-11-09 10:42:25,707 INFO L226 Difference]: Without dead ends: 150 [2021-11-09 10:42:25,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:42:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-09 10:42:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 132. [2021-11-09 10:42:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.381679389312977) internal successors, (181), 131 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 181 transitions. [2021-11-09 10:42:25,718 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 181 transitions. Word has length 22 [2021-11-09 10:42:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:25,718 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 181 transitions. [2021-11-09 10:42:25,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 181 transitions. [2021-11-09 10:42:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:42:25,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:25,720 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:25,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:25,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 10:42:25,930 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:25,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1894811100, now seen corresponding path program 6 times [2021-11-09 10:42:25,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:25,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061722043] [2021-11-09 10:42:25,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:25,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:42:26,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:26,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061722043] [2021-11-09 10:42:26,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061722043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:26,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721792699] [2021-11-09 10:42:26,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:42:26,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:26,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:26,094 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:26,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 10:42:26,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 10:42:26,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:26,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:42:26,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:42:26,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721792699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:26,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:26,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-11-09 10:42:26,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848603464] [2021-11-09 10:42:26,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:42:26,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:26,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:42:26,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:42:26,592 INFO L87 Difference]: Start difference. First operand 132 states and 181 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:26,734 INFO L93 Difference]: Finished difference Result 166 states and 232 transitions. [2021-11-09 10:42:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:42:26,735 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 10:42:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:26,737 INFO L225 Difference]: With dead ends: 166 [2021-11-09 10:42:26,737 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 10:42:26,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:42:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 10:42:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2021-11-09 10:42:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.3896103896103895) internal successors, (214), 154 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 214 transitions. [2021-11-09 10:42:26,771 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 214 transitions. Word has length 22 [2021-11-09 10:42:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:26,771 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 214 transitions. [2021-11-09 10:42:26,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 214 transitions. [2021-11-09 10:42:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:42:26,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:26,773 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:26,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:26,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:26,982 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash -476295188, now seen corresponding path program 10 times [2021-11-09 10:42:26,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:26,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195362500] [2021-11-09 10:42:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:26,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 10:42:27,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:27,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195362500] [2021-11-09 10:42:27,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195362500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:27,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003192196] [2021-11-09 10:42:27,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:27,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:27,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:27,119 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:27,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 10:42:27,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:27,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 10:42:27,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 10:42:27,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003192196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:27,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:27,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-09 10:42:27,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336157273] [2021-11-09 10:42:27,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:42:27,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:27,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:42:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:42:27,632 INFO L87 Difference]: Start difference. First operand 155 states and 214 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:27,784 INFO L93 Difference]: Finished difference Result 200 states and 258 transitions. [2021-11-09 10:42:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:42:27,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 10:42:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:27,786 INFO L225 Difference]: With dead ends: 200 [2021-11-09 10:42:27,786 INFO L226 Difference]: Without dead ends: 188 [2021-11-09 10:42:27,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:42:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-09 10:42:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 155. [2021-11-09 10:42:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.3831168831168832) internal successors, (213), 154 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 213 transitions. [2021-11-09 10:42:27,800 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 213 transitions. Word has length 22 [2021-11-09 10:42:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:27,800 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 213 transitions. [2021-11-09 10:42:27,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:27,801 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 213 transitions. [2021-11-09 10:42:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:42:27,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:27,802 INFO L513 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:27,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:28,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-09 10:42:28,026 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:28,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:28,026 INFO L85 PathProgramCache]: Analyzing trace with hash 427628828, now seen corresponding path program 12 times [2021-11-09 10:42:28,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:28,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683158044] [2021-11-09 10:42:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:28,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:28,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:28,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683158044] [2021-11-09 10:42:28,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683158044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:28,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758395707] [2021-11-09 10:42:28,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:42:28,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:28,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:28,286 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:28,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 10:42:28,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 10:42:28,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:28,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 10:42:28,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:28,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758395707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:28,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:28,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 10:42:28,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048174738] [2021-11-09 10:42:28,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:42:28,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:28,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:42:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:42:28,949 INFO L87 Difference]: Start difference. First operand 155 states and 213 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:29,339 INFO L93 Difference]: Finished difference Result 256 states and 392 transitions. [2021-11-09 10:42:29,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:42:29,340 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 10:42:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:29,342 INFO L225 Difference]: With dead ends: 256 [2021-11-09 10:42:29,342 INFO L226 Difference]: Without dead ends: 239 [2021-11-09 10:42:29,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:42:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-09 10:42:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 168. [2021-11-09 10:42:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.3892215568862276) internal successors, (232), 167 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 232 transitions. [2021-11-09 10:42:29,357 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 232 transitions. Word has length 22 [2021-11-09 10:42:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:29,358 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 232 transitions. [2021-11-09 10:42:29,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 232 transitions. [2021-11-09 10:42:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:42:29,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:29,359 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:29,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:29,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:29,565 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:29,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1912260034, now seen corresponding path program 7 times [2021-11-09 10:42:29,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:29,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856553278] [2021-11-09 10:42:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:29,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:42:29,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:29,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856553278] [2021-11-09 10:42:29,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856553278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:29,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140315072] [2021-11-09 10:42:29,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:42:29,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:29,716 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:29,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 10:42:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:30,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:42:30,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:42:30,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140315072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:30,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:30,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-11-09 10:42:30,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281346048] [2021-11-09 10:42:30,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:42:30,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:30,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:42:30,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:42:30,268 INFO L87 Difference]: Start difference. First operand 168 states and 232 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:30,505 INFO L93 Difference]: Finished difference Result 200 states and 264 transitions. [2021-11-09 10:42:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:42:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 10:42:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:30,507 INFO L225 Difference]: With dead ends: 200 [2021-11-09 10:42:30,507 INFO L226 Difference]: Without dead ends: 181 [2021-11-09 10:42:30,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:42:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-09 10:42:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2021-11-09 10:42:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.3734939759036144) internal successors, (228), 166 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 228 transitions. [2021-11-09 10:42:30,522 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 228 transitions. Word has length 23 [2021-11-09 10:42:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:30,522 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 228 transitions. [2021-11-09 10:42:30,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 228 transitions. [2021-11-09 10:42:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:42:30,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:30,523 INFO L513 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:30,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:30,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:30,724 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1236870529, now seen corresponding path program 13 times [2021-11-09 10:42:30,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:30,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461054212] [2021-11-09 10:42:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:30,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:30,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:30,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461054212] [2021-11-09 10:42:30,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461054212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:30,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966824764] [2021-11-09 10:42:30,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:42:30,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:30,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:30,994 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:30,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 10:42:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:31,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 10:42:31,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:31,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966824764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:31,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:31,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 10:42:31,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145917866] [2021-11-09 10:42:31,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:42:31,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:42:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:42:31,516 INFO L87 Difference]: Start difference. First operand 167 states and 228 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:31,965 INFO L93 Difference]: Finished difference Result 273 states and 417 transitions. [2021-11-09 10:42:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:42:31,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 10:42:31,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:31,967 INFO L225 Difference]: With dead ends: 273 [2021-11-09 10:42:31,967 INFO L226 Difference]: Without dead ends: 256 [2021-11-09 10:42:31,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:42:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-09 10:42:31,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 180. [2021-11-09 10:42:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.3798882681564246) internal successors, (247), 179 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 247 transitions. [2021-11-09 10:42:31,987 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 247 transitions. Word has length 23 [2021-11-09 10:42:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:31,987 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 247 transitions. [2021-11-09 10:42:31,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 247 transitions. [2021-11-09 10:42:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 10:42:31,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:31,989 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:32,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:32,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 10:42:32,206 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:32,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:32,206 INFO L85 PathProgramCache]: Analyzing trace with hash 941279950, now seen corresponding path program 11 times [2021-11-09 10:42:32,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:32,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117131009] [2021-11-09 10:42:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:32,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 10:42:32,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:32,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117131009] [2021-11-09 10:42:32,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117131009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:32,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484366736] [2021-11-09 10:42:32,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:32,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:32,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:32,370 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:32,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 10:42:32,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 10:42:32,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:42:33,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 10:42:33,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484366736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:33,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:33,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 10:42:33,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007472016] [2021-11-09 10:42:33,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:42:33,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:33,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:42:33,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:42:33,110 INFO L87 Difference]: Start difference. First operand 180 states and 247 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:33,272 INFO L93 Difference]: Finished difference Result 220 states and 287 transitions. [2021-11-09 10:42:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:42:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 10:42:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:33,274 INFO L225 Difference]: With dead ends: 220 [2021-11-09 10:42:33,274 INFO L226 Difference]: Without dead ends: 207 [2021-11-09 10:42:33,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:42:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-09 10:42:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 180. [2021-11-09 10:42:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.3743016759776536) internal successors, (246), 179 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 246 transitions. [2021-11-09 10:42:33,289 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 246 transitions. Word has length 24 [2021-11-09 10:42:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:33,290 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 246 transitions. [2021-11-09 10:42:33,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 246 transitions. [2021-11-09 10:42:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 10:42:33,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:33,291 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:33,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:33,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 10:42:33,491 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:33,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:33,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1159066180, now seen corresponding path program 12 times [2021-11-09 10:42:33,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:33,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094238584] [2021-11-09 10:42:33,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:33,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:33,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:33,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094238584] [2021-11-09 10:42:33,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094238584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:33,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356320662] [2021-11-09 10:42:33,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:42:33,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:33,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:33,674 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:33,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 10:42:34,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 10:42:34,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:34,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:42:34,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:34,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356320662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:34,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:34,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 10:42:34,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670250671] [2021-11-09 10:42:34,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:42:34,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:34,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:42:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:42:34,367 INFO L87 Difference]: Start difference. First operand 180 states and 246 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:34,517 INFO L93 Difference]: Finished difference Result 230 states and 295 transitions. [2021-11-09 10:42:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:42:34,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 10:42:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:34,520 INFO L225 Difference]: With dead ends: 230 [2021-11-09 10:42:34,520 INFO L226 Difference]: Without dead ends: 217 [2021-11-09 10:42:34,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:42:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-09 10:42:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 180. [2021-11-09 10:42:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.3687150837988826) internal successors, (245), 179 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 245 transitions. [2021-11-09 10:42:34,536 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 245 transitions. Word has length 24 [2021-11-09 10:42:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:34,537 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 245 transitions. [2021-11-09 10:42:34,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 245 transitions. [2021-11-09 10:42:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 10:42:34,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:34,538 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:34,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-09 10:42:34,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 10:42:34,766 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:34,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:34,766 INFO L85 PathProgramCache]: Analyzing trace with hash 553559484, now seen corresponding path program 14 times [2021-11-09 10:42:34,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:34,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911573398] [2021-11-09 10:42:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:34,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:35,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:35,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911573398] [2021-11-09 10:42:35,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911573398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:35,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228680386] [2021-11-09 10:42:35,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:35,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:35,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:35,104 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:35,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 10:42:35,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:35,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:35,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 10:42:35,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:35,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228680386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:35,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:35,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 10:42:35,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962933787] [2021-11-09 10:42:35,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:42:35,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:42:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:42:35,781 INFO L87 Difference]: Start difference. First operand 180 states and 245 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:36,302 INFO L93 Difference]: Finished difference Result 291 states and 444 transitions. [2021-11-09 10:42:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:42:36,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 10:42:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:36,306 INFO L225 Difference]: With dead ends: 291 [2021-11-09 10:42:36,306 INFO L226 Difference]: Without dead ends: 274 [2021-11-09 10:42:36,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:42:36,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-09 10:42:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 193. [2021-11-09 10:42:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.375) internal successors, (264), 192 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 264 transitions. [2021-11-09 10:42:36,324 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 264 transitions. Word has length 24 [2021-11-09 10:42:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:36,324 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 264 transitions. [2021-11-09 10:42:36,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 264 transitions. [2021-11-09 10:42:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 10:42:36,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:36,326 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:36,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:36,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 10:42:36,548 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:36,548 INFO L85 PathProgramCache]: Analyzing trace with hash -510369070, now seen corresponding path program 8 times [2021-11-09 10:42:36,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:36,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388302941] [2021-11-09 10:42:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:36,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:42:36,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:36,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388302941] [2021-11-09 10:42:36,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388302941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:36,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490661897] [2021-11-09 10:42:36,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:36,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:36,750 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:36,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 10:42:37,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:37,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:37,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:42:37,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:42:37,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490661897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:37,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:37,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2021-11-09 10:42:37,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748845352] [2021-11-09 10:42:37,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:42:37,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:42:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:42:37,425 INFO L87 Difference]: Start difference. First operand 193 states and 264 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:37,647 INFO L93 Difference]: Finished difference Result 234 states and 326 transitions. [2021-11-09 10:42:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:42:37,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 10:42:37,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:37,650 INFO L225 Difference]: With dead ends: 234 [2021-11-09 10:42:37,650 INFO L226 Difference]: Without dead ends: 230 [2021-11-09 10:42:37,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:42:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-09 10:42:37,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2021-11-09 10:42:37,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.3818181818181818) internal successors, (304), 220 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 304 transitions. [2021-11-09 10:42:37,670 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 304 transitions. Word has length 25 [2021-11-09 10:42:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:37,671 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 304 transitions. [2021-11-09 10:42:37,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 304 transitions. [2021-11-09 10:42:37,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 10:42:37,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:37,672 INFO L513 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:37,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:37,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:37,898 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:37,898 INFO L85 PathProgramCache]: Analyzing trace with hash 845753569, now seen corresponding path program 15 times [2021-11-09 10:42:37,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:37,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590109187] [2021-11-09 10:42:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:37,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:38,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:38,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590109187] [2021-11-09 10:42:38,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590109187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:38,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739662794] [2021-11-09 10:42:38,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:38,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:38,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:38,201 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:38,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 10:42:38,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 10:42:38,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:38,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 10:42:38,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:39,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739662794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:39,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:39,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-09 10:42:39,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757819131] [2021-11-09 10:42:39,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:42:39,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:42:39,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:42:39,012 INFO L87 Difference]: Start difference. First operand 221 states and 304 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:39,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:39,475 INFO L93 Difference]: Finished difference Result 357 states and 551 transitions. [2021-11-09 10:42:39,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:42:39,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 10:42:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:39,479 INFO L225 Difference]: With dead ends: 357 [2021-11-09 10:42:39,479 INFO L226 Difference]: Without dead ends: 338 [2021-11-09 10:42:39,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:42:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-09 10:42:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 236. [2021-11-09 10:42:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.3872340425531915) internal successors, (326), 235 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 326 transitions. [2021-11-09 10:42:39,501 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 326 transitions. Word has length 25 [2021-11-09 10:42:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:39,501 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 326 transitions. [2021-11-09 10:42:39,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 326 transitions. [2021-11-09 10:42:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 10:42:39,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:39,503 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:39,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:39,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 10:42:39,709 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:39,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:39,709 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 13 times [2021-11-09 10:42:39,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:39,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524392672] [2021-11-09 10:42:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:39,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:40,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:40,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524392672] [2021-11-09 10:42:40,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524392672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:40,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027435913] [2021-11-09 10:42:40,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:42:40,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:40,228 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:40,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 10:42:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:40,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 10:42:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:42,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027435913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:42,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:42,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 39 [2021-11-09 10:42:42,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185869189] [2021-11-09 10:42:42,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 10:42:42,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:42,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 10:42:42,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:42:42,037 INFO L87 Difference]: Start difference. First operand 236 states and 326 transitions. Second operand has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:42,923 INFO L93 Difference]: Finished difference Result 253 states and 344 transitions. [2021-11-09 10:42:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 10:42:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 10:42:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:42,936 INFO L225 Difference]: With dead ends: 253 [2021-11-09 10:42:42,936 INFO L226 Difference]: Without dead ends: 230 [2021-11-09 10:42:42,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=138, Invalid=1842, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:42:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-09 10:42:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-11-09 10:42:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.3930131004366813) internal successors, (319), 229 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 319 transitions. [2021-11-09 10:42:42,957 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 319 transitions. Word has length 26 [2021-11-09 10:42:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:42,957 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 319 transitions. [2021-11-09 10:42:42,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:42,957 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 319 transitions. [2021-11-09 10:42:42,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 10:42:42,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:42,959 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:42,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:43,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 10:42:43,178 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:43,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1118982868, now seen corresponding path program 14 times [2021-11-09 10:42:43,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:43,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561583827] [2021-11-09 10:42:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:43,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 10:42:43,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:43,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561583827] [2021-11-09 10:42:43,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561583827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:43,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750976035] [2021-11-09 10:42:43,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:43,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:43,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:43,352 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:43,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 10:42:43,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:43,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:43,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 10:42:43,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 10:42:44,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750976035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:44,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:44,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-11-09 10:42:44,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314325287] [2021-11-09 10:42:44,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 10:42:44,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 10:42:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:42:44,014 INFO L87 Difference]: Start difference. First operand 230 states and 319 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:44,147 INFO L93 Difference]: Finished difference Result 272 states and 361 transitions. [2021-11-09 10:42:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:42:44,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 10:42:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:44,149 INFO L225 Difference]: With dead ends: 272 [2021-11-09 10:42:44,149 INFO L226 Difference]: Without dead ends: 258 [2021-11-09 10:42:44,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:42:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-09 10:42:44,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 230. [2021-11-09 10:42:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.388646288209607) internal successors, (318), 229 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 318 transitions. [2021-11-09 10:42:44,168 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 318 transitions. Word has length 26 [2021-11-09 10:42:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:44,168 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 318 transitions. [2021-11-09 10:42:44,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 318 transitions. [2021-11-09 10:42:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 10:42:44,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:44,170 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:44,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-09 10:42:44,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-09 10:42:44,387 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:44,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash -745924722, now seen corresponding path program 9 times [2021-11-09 10:42:44,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:44,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576456233] [2021-11-09 10:42:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:44,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:42:44,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:44,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576456233] [2021-11-09 10:42:44,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576456233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:44,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365640911] [2021-11-09 10:42:44,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:44,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:44,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:44,633 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:44,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 10:42:45,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:42:45,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:45,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 10:42:45,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:42:45,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365640911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:45,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:45,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-11-09 10:42:45,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221750340] [2021-11-09 10:42:45,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:42:45,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:45,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:42:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:42:45,521 INFO L87 Difference]: Start difference. First operand 230 states and 318 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:45,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:45,775 INFO L93 Difference]: Finished difference Result 267 states and 355 transitions. [2021-11-09 10:42:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:42:45,775 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 10:42:45,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:45,777 INFO L225 Difference]: With dead ends: 267 [2021-11-09 10:42:45,777 INFO L226 Difference]: Without dead ends: 245 [2021-11-09 10:42:45,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:42:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-09 10:42:45,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2021-11-09 10:42:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.3771929824561404) internal successors, (314), 228 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 314 transitions. [2021-11-09 10:42:45,798 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 314 transitions. Word has length 26 [2021-11-09 10:42:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:45,798 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 314 transitions. [2021-11-09 10:42:45,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 314 transitions. [2021-11-09 10:42:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 10:42:45,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:45,800 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:45,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:46,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:46,014 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:46,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:46,014 INFO L85 PathProgramCache]: Analyzing trace with hash 122662236, now seen corresponding path program 15 times [2021-11-09 10:42:46,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:46,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171762736] [2021-11-09 10:42:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:46,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 10:42:46,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:46,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171762736] [2021-11-09 10:42:46,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171762736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:46,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406757028] [2021-11-09 10:42:46,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:46,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:46,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:46,205 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:46,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 10:42:46,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:42:46,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:46,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 10:42:46,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 10:42:46,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406757028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:46,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:46,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-09 10:42:46,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462564029] [2021-11-09 10:42:46,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:42:46,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:42:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:42:46,901 INFO L87 Difference]: Start difference. First operand 229 states and 314 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:47,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:47,083 INFO L93 Difference]: Finished difference Result 281 states and 366 transitions. [2021-11-09 10:42:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:42:47,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 10:42:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:47,085 INFO L225 Difference]: With dead ends: 281 [2021-11-09 10:42:47,085 INFO L226 Difference]: Without dead ends: 267 [2021-11-09 10:42:47,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:42:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-09 10:42:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 229. [2021-11-09 10:42:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.3728070175438596) internal successors, (313), 228 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 313 transitions. [2021-11-09 10:42:47,100 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 313 transitions. Word has length 26 [2021-11-09 10:42:47,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:47,101 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 313 transitions. [2021-11-09 10:42:47,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:47,101 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 313 transitions. [2021-11-09 10:42:47,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 10:42:47,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:47,102 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:47,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:47,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 10:42:47,323 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:47,324 INFO L85 PathProgramCache]: Analyzing trace with hash 301262636, now seen corresponding path program 16 times [2021-11-09 10:42:47,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:47,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216397634] [2021-11-09 10:42:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:47,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 10:42:47,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:47,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216397634] [2021-11-09 10:42:47,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216397634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:47,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491196062] [2021-11-09 10:42:47,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:47,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:47,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:47,514 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:47,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 10:42:48,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:48,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:48,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 10:42:48,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 10:42:48,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491196062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:48,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:48,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-09 10:42:48,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261639898] [2021-11-09 10:42:48,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:42:48,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:48,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:42:48,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:42:48,356 INFO L87 Difference]: Start difference. First operand 229 states and 313 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:48,564 INFO L93 Difference]: Finished difference Result 293 states and 376 transitions. [2021-11-09 10:42:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:42:48,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 10:42:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:48,568 INFO L225 Difference]: With dead ends: 293 [2021-11-09 10:42:48,568 INFO L226 Difference]: Without dead ends: 279 [2021-11-09 10:42:48,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:42:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-09 10:42:48,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 229. [2021-11-09 10:42:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.368421052631579) internal successors, (312), 228 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 312 transitions. [2021-11-09 10:42:48,586 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 312 transitions. Word has length 26 [2021-11-09 10:42:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:48,587 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 312 transitions. [2021-11-09 10:42:48,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 312 transitions. [2021-11-09 10:42:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 10:42:48,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:48,589 INFO L513 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:48,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:48,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 10:42:48,802 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1313835612, now seen corresponding path program 16 times [2021-11-09 10:42:48,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:48,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291594021] [2021-11-09 10:42:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:48,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:49,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:49,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291594021] [2021-11-09 10:42:49,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291594021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:49,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832742309] [2021-11-09 10:42:49,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:49,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:49,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:49,178 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:49,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 10:42:49,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:49,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:49,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:42:49,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:49,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832742309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:49,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:49,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 10:42:49,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930277563] [2021-11-09 10:42:49,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:42:49,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:42:49,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:42:49,991 INFO L87 Difference]: Start difference. First operand 229 states and 312 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:50,538 INFO L93 Difference]: Finished difference Result 371 states and 571 transitions. [2021-11-09 10:42:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 10:42:50,539 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 10:42:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:50,541 INFO L225 Difference]: With dead ends: 371 [2021-11-09 10:42:50,541 INFO L226 Difference]: Without dead ends: 352 [2021-11-09 10:42:50,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:42:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-09 10:42:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 244. [2021-11-09 10:42:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.374485596707819) internal successors, (334), 243 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 334 transitions. [2021-11-09 10:42:50,562 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 334 transitions. Word has length 26 [2021-11-09 10:42:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:50,563 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 334 transitions. [2021-11-09 10:42:50,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 334 transitions. [2021-11-09 10:42:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 10:42:50,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:50,564 INFO L513 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:50,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:50,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:50,790 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:50,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1355490239, now seen corresponding path program 17 times [2021-11-09 10:42:50,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:50,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556088109] [2021-11-09 10:42:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:50,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:51,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:51,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556088109] [2021-11-09 10:42:51,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556088109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:51,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9715810] [2021-11-09 10:42:51,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:51,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:51,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:51,202 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:51,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 10:42:54,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-09 10:42:54,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:54,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 10:42:54,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:55,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9715810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:55,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:55,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-09 10:42:55,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848080267] [2021-11-09 10:42:55,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:42:55,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:55,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:42:55,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:42:55,076 INFO L87 Difference]: Start difference. First operand 244 states and 334 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:55,644 INFO L93 Difference]: Finished difference Result 392 states and 605 transitions. [2021-11-09 10:42:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:42:55,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 10:42:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:55,647 INFO L225 Difference]: With dead ends: 392 [2021-11-09 10:42:55,647 INFO L226 Difference]: Without dead ends: 373 [2021-11-09 10:42:55,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:42:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-09 10:42:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 259. [2021-11-09 10:42:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.37984496124031) internal successors, (356), 258 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 356 transitions. [2021-11-09 10:42:55,678 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 356 transitions. Word has length 27 [2021-11-09 10:42:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:55,678 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 356 transitions. [2021-11-09 10:42:55,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 356 transitions. [2021-11-09 10:42:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:42:55,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:55,680 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:55,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-09 10:42:55,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 10:42:55,880 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1973427396, now seen corresponding path program 17 times [2021-11-09 10:42:55,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:55,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974932259] [2021-11-09 10:42:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:55,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 10:42:56,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:56,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974932259] [2021-11-09 10:42:56,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974932259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:56,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851255823] [2021-11-09 10:42:56,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:56,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:56,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:56,098 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:56,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 10:42:57,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 10:42:57,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:57,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 10:42:57,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 10:42:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851255823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:57,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:57,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-09 10:42:57,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250540744] [2021-11-09 10:42:57,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:42:57,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:42:57,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:42:57,289 INFO L87 Difference]: Start difference. First operand 259 states and 356 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:57,548 INFO L93 Difference]: Finished difference Result 305 states and 402 transitions. [2021-11-09 10:42:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:42:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 10:42:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:57,551 INFO L225 Difference]: With dead ends: 305 [2021-11-09 10:42:57,551 INFO L226 Difference]: Without dead ends: 290 [2021-11-09 10:42:57,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:42:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-09 10:42:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 259. [2021-11-09 10:42:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.375968992248062) internal successors, (355), 258 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 355 transitions. [2021-11-09 10:42:57,571 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 355 transitions. Word has length 28 [2021-11-09 10:42:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:57,572 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 355 transitions. [2021-11-09 10:42:57,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 355 transitions. [2021-11-09 10:42:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:42:57,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:57,574 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:57,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:57,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:57,780 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:57,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1548332572, now seen corresponding path program 10 times [2021-11-09 10:42:57,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:57,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474488488] [2021-11-09 10:42:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:57,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 10:42:58,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:58,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474488488] [2021-11-09 10:42:58,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474488488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:58,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83605755] [2021-11-09 10:42:58,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:58,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:58,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:58,042 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:58,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 10:42:58,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:58,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:58,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 10:42:58,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 10:42:58,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83605755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:58,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:58,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2021-11-09 10:42:58,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407357964] [2021-11-09 10:42:58,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:42:58,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:42:58,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:42:58,907 INFO L87 Difference]: Start difference. First operand 259 states and 355 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:59,166 INFO L93 Difference]: Finished difference Result 307 states and 428 transitions. [2021-11-09 10:42:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:42:59,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 10:42:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:59,168 INFO L225 Difference]: With dead ends: 307 [2021-11-09 10:42:59,168 INFO L226 Difference]: Without dead ends: 303 [2021-11-09 10:42:59,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:42:59,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-09 10:42:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2021-11-09 10:42:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.3814432989690721) internal successors, (402), 291 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 402 transitions. [2021-11-09 10:42:59,188 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 402 transitions. Word has length 28 [2021-11-09 10:42:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:59,188 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 402 transitions. [2021-11-09 10:42:59,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 402 transitions. [2021-11-09 10:42:59,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:42:59,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:59,189 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:59,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-09 10:42:59,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 10:42:59,390 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1097487922, now seen corresponding path program 18 times [2021-11-09 10:42:59,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:59,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067162211] [2021-11-09 10:42:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:59,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-09 10:42:59,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:59,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067162211] [2021-11-09 10:42:59,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067162211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:59,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063746294] [2021-11-09 10:42:59,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:42:59,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:59,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:59,582 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:59,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 10:43:00,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 10:43:00,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:00,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:43:00,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-09 10:43:00,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063746294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:00,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:00,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-09 10:43:00,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796127210] [2021-11-09 10:43:00,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:43:00,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:00,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:43:00,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:43:00,420 INFO L87 Difference]: Start difference. First operand 292 states and 402 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:00,664 INFO L93 Difference]: Finished difference Result 358 states and 468 transitions. [2021-11-09 10:43:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:43:00,665 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 10:43:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:00,668 INFO L225 Difference]: With dead ends: 358 [2021-11-09 10:43:00,668 INFO L226 Difference]: Without dead ends: 343 [2021-11-09 10:43:00,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:43:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-09 10:43:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 292. [2021-11-09 10:43:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.3780068728522337) internal successors, (401), 291 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 401 transitions. [2021-11-09 10:43:00,692 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 401 transitions. Word has length 28 [2021-11-09 10:43:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:00,693 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 401 transitions. [2021-11-09 10:43:00,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 401 transitions. [2021-11-09 10:43:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:43:00,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:00,695 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:00,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:00,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 10:43:00,901 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1008978172, now seen corresponding path program 19 times [2021-11-09 10:43:00,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:00,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067137185] [2021-11-09 10:43:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:00,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 10:43:01,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:01,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067137185] [2021-11-09 10:43:01,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067137185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:01,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469331666] [2021-11-09 10:43:01,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:43:01,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:01,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:01,106 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:01,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 10:43:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:01,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:43:01,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 10:43:01,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469331666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:01,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:01,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-09 10:43:01,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862481117] [2021-11-09 10:43:01,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:43:01,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:01,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:43:01,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:43:01,999 INFO L87 Difference]: Start difference. First operand 292 states and 401 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:02,214 INFO L93 Difference]: Finished difference Result 372 states and 480 transitions. [2021-11-09 10:43:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:43:02,215 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 10:43:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:02,216 INFO L225 Difference]: With dead ends: 372 [2021-11-09 10:43:02,216 INFO L226 Difference]: Without dead ends: 357 [2021-11-09 10:43:02,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:43:02,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-09 10:43:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 292. [2021-11-09 10:43:02,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.3745704467353952) internal successors, (400), 291 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 400 transitions. [2021-11-09 10:43:02,239 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 400 transitions. Word has length 28 [2021-11-09 10:43:02,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:02,240 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 400 transitions. [2021-11-09 10:43:02,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 400 transitions. [2021-11-09 10:43:02,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:43:02,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:02,241 INFO L513 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:02,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:02,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 10:43:02,469 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:02,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1794754300, now seen corresponding path program 18 times [2021-11-09 10:43:02,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:02,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664289939] [2021-11-09 10:43:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:02,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:02,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:02,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664289939] [2021-11-09 10:43:02,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664289939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:02,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066400787] [2021-11-09 10:43:02,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:43:02,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:02,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:02,930 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:02,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 10:43:03,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-09 10:43:03,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 10:43:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:04,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066400787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:04,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:04,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-09 10:43:04,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064519290] [2021-11-09 10:43:04,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 10:43:04,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:04,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 10:43:04,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:43:04,053 INFO L87 Difference]: Start difference. First operand 292 states and 400 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:04,654 INFO L93 Difference]: Finished difference Result 469 states and 727 transitions. [2021-11-09 10:43:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 10:43:04,655 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 10:43:04,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:04,657 INFO L225 Difference]: With dead ends: 469 [2021-11-09 10:43:04,657 INFO L226 Difference]: Without dead ends: 448 [2021-11-09 10:43:04,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:43:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-09 10:43:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 309. [2021-11-09 10:43:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.37987012987013) internal successors, (425), 308 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 425 transitions. [2021-11-09 10:43:04,675 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 425 transitions. Word has length 28 [2021-11-09 10:43:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:04,675 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 425 transitions. [2021-11-09 10:43:04,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 425 transitions. [2021-11-09 10:43:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 10:43:04,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:04,677 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:04,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-09 10:43:04,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:04,884 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1464293950, now seen corresponding path program 11 times [2021-11-09 10:43:04,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:04,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502744183] [2021-11-09 10:43:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:04,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 10:43:05,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:05,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502744183] [2021-11-09 10:43:05,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502744183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:05,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521743019] [2021-11-09 10:43:05,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:43:05,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:05,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:05,127 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:05,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 10:43:06,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 10:43:06,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:06,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 10:43:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 10:43:06,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521743019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:06,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:06,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-11-09 10:43:06,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566868719] [2021-11-09 10:43:06,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 10:43:06,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 10:43:06,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:43:06,533 INFO L87 Difference]: Start difference. First operand 309 states and 425 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:07,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:07,049 INFO L93 Difference]: Finished difference Result 366 states and 482 transitions. [2021-11-09 10:43:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 10:43:07,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 10:43:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:07,051 INFO L225 Difference]: With dead ends: 366 [2021-11-09 10:43:07,051 INFO L226 Difference]: Without dead ends: 334 [2021-11-09 10:43:07,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:43:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-09 10:43:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 308. [2021-11-09 10:43:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3680781758957654) internal successors, (420), 307 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 420 transitions. [2021-11-09 10:43:07,076 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 420 transitions. Word has length 29 [2021-11-09 10:43:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:07,076 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 420 transitions. [2021-11-09 10:43:07,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 420 transitions. [2021-11-09 10:43:07,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 10:43:07,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:07,078 INFO L513 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:07,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:07,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:07,285 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:07,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:07,286 INFO L85 PathProgramCache]: Analyzing trace with hash 668087201, now seen corresponding path program 19 times [2021-11-09 10:43:07,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:07,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640011224] [2021-11-09 10:43:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:07,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:07,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:07,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640011224] [2021-11-09 10:43:07,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640011224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:07,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790981271] [2021-11-09 10:43:07,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:43:07,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:07,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:07,745 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:07,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 10:43:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:08,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 10:43:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:08,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790981271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:08,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:08,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 10:43:08,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022769266] [2021-11-09 10:43:08,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:43:08,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:43:08,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:43:08,572 INFO L87 Difference]: Start difference. First operand 308 states and 420 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:09,220 INFO L93 Difference]: Finished difference Result 492 states and 761 transitions. [2021-11-09 10:43:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:43:09,221 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 10:43:09,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:09,223 INFO L225 Difference]: With dead ends: 492 [2021-11-09 10:43:09,223 INFO L226 Difference]: Without dead ends: 471 [2021-11-09 10:43:09,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:43:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-09 10:43:09,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 325. [2021-11-09 10:43:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.373456790123457) internal successors, (445), 324 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 445 transitions. [2021-11-09 10:43:09,249 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 445 transitions. Word has length 29 [2021-11-09 10:43:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:09,249 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 445 transitions. [2021-11-09 10:43:09,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 445 transitions. [2021-11-09 10:43:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:43:09,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:09,251 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:09,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:09,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-09 10:43:09,466 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:09,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:09,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1507034516, now seen corresponding path program 20 times [2021-11-09 10:43:09,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:09,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244451079] [2021-11-09 10:43:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:09,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:10,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:10,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244451079] [2021-11-09 10:43:10,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244451079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:10,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480159865] [2021-11-09 10:43:10,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:43:10,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:10,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:10,157 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:10,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 10:43:11,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:43:11,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:11,586 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-09 10:43:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:13,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480159865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:13,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:13,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 46 [2021-11-09 10:43:13,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948037690] [2021-11-09 10:43:13,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 10:43:13,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:13,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 10:43:13,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1951, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:43:13,610 INFO L87 Difference]: Start difference. First operand 325 states and 445 transitions. Second operand has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:14,929 INFO L93 Difference]: Finished difference Result 344 states and 465 transitions. [2021-11-09 10:43:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 10:43:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 10:43:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:14,931 INFO L225 Difference]: With dead ends: 344 [2021-11-09 10:43:14,931 INFO L226 Difference]: Without dead ends: 318 [2021-11-09 10:43:14,932 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=162, Invalid=2594, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 10:43:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-09 10:43:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2021-11-09 10:43:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.3785488958990537) internal successors, (437), 317 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 437 transitions. [2021-11-09 10:43:14,955 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 437 transitions. Word has length 30 [2021-11-09 10:43:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:14,955 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 437 transitions. [2021-11-09 10:43:14,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 437 transitions. [2021-11-09 10:43:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:43:14,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:14,957 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:14,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-09 10:43:15,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:15,164 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2113622932, now seen corresponding path program 21 times [2021-11-09 10:43:15,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:15,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044141911] [2021-11-09 10:43:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:15,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-09 10:43:15,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:15,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044141911] [2021-11-09 10:43:15,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044141911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:15,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367359155] [2021-11-09 10:43:15,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:43:15,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:15,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:15,390 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:15,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 10:43:16,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 10:43:16,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:16,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:43:16,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-09 10:43:16,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367359155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:16,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:16,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-09 10:43:16,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593853680] [2021-11-09 10:43:16,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:43:16,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:16,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:43:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:43:16,528 INFO L87 Difference]: Start difference. First operand 318 states and 437 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:16,793 INFO L93 Difference]: Finished difference Result 377 states and 496 transitions. [2021-11-09 10:43:16,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:43:16,794 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 10:43:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:16,796 INFO L225 Difference]: With dead ends: 377 [2021-11-09 10:43:16,796 INFO L226 Difference]: Without dead ends: 361 [2021-11-09 10:43:16,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:43:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-09 10:43:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 318. [2021-11-09 10:43:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.3753943217665616) internal successors, (436), 317 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 436 transitions. [2021-11-09 10:43:16,854 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 436 transitions. Word has length 30 [2021-11-09 10:43:16,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:16,854 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 436 transitions. [2021-11-09 10:43:16,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:16,854 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 436 transitions. [2021-11-09 10:43:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:43:16,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:16,856 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:16,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:17,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:17,076 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:17,077 INFO L85 PathProgramCache]: Analyzing trace with hash 310343900, now seen corresponding path program 22 times [2021-11-09 10:43:17,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:17,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395871107] [2021-11-09 10:43:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:17,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 10:43:17,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:17,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395871107] [2021-11-09 10:43:17,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395871107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:17,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892014472] [2021-11-09 10:43:17,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:43:17,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:17,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:17,286 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:17,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 10:43:18,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:43:18,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:18,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:43:18,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 10:43:18,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892014472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:18,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:18,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-09 10:43:18,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044535292] [2021-11-09 10:43:18,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:43:18,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:18,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:43:18,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:43:18,220 INFO L87 Difference]: Start difference. First operand 318 states and 436 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:18,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:18,510 INFO L93 Difference]: Finished difference Result 390 states and 508 transitions. [2021-11-09 10:43:18,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:43:18,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 10:43:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:18,512 INFO L225 Difference]: With dead ends: 390 [2021-11-09 10:43:18,512 INFO L226 Difference]: Without dead ends: 374 [2021-11-09 10:43:18,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:43:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-09 10:43:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 318. [2021-11-09 10:43:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.3722397476340693) internal successors, (435), 317 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:18,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 435 transitions. [2021-11-09 10:43:18,539 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 435 transitions. Word has length 30 [2021-11-09 10:43:18,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:18,539 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 435 transitions. [2021-11-09 10:43:18,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:18,540 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 435 transitions. [2021-11-09 10:43:18,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:43:18,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:18,541 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:18,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:18,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 10:43:18,766 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:18,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:18,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2051104364, now seen corresponding path program 23 times [2021-11-09 10:43:18,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:18,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809609120] [2021-11-09 10:43:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:18,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 10:43:18,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:18,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809609120] [2021-11-09 10:43:18,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809609120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:18,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956729275] [2021-11-09 10:43:18,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:43:18,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:18,974 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:19,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 10:43:20,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 10:43:20,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:20,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:43:20,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 10:43:20,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956729275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:20,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:20,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-09 10:43:20,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154005798] [2021-11-09 10:43:20,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:43:20,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:20,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:43:20,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:43:20,871 INFO L87 Difference]: Start difference. First operand 318 states and 435 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:21,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:21,128 INFO L93 Difference]: Finished difference Result 405 states and 521 transitions. [2021-11-09 10:43:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:43:21,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 10:43:21,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:21,130 INFO L225 Difference]: With dead ends: 405 [2021-11-09 10:43:21,131 INFO L226 Difference]: Without dead ends: 389 [2021-11-09 10:43:21,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:43:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-09 10:43:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 318. [2021-11-09 10:43:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.3690851735015772) internal successors, (434), 317 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 434 transitions. [2021-11-09 10:43:21,147 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 434 transitions. Word has length 30 [2021-11-09 10:43:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:21,147 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 434 transitions. [2021-11-09 10:43:21,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 434 transitions. [2021-11-09 10:43:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:43:21,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:21,148 INFO L513 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:21,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:21,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-09 10:43:21,349 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:21,350 INFO L85 PathProgramCache]: Analyzing trace with hash 101145500, now seen corresponding path program 20 times [2021-11-09 10:43:21,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:21,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148588149] [2021-11-09 10:43:21,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:21,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:21,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:21,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148588149] [2021-11-09 10:43:21,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148588149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:21,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14179761] [2021-11-09 10:43:21,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:43:21,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:21,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:21,898 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:21,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 10:43:22,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:43:22,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:22,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 10:43:22,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:23,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14179761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:23,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:23,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-09 10:43:23,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308586590] [2021-11-09 10:43:23,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:43:23,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:23,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:43:23,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:43:23,042 INFO L87 Difference]: Start difference. First operand 318 states and 434 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:23,727 INFO L93 Difference]: Finished difference Result 509 states and 789 transitions. [2021-11-09 10:43:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:43:23,727 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 10:43:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:23,730 INFO L225 Difference]: With dead ends: 509 [2021-11-09 10:43:23,730 INFO L226 Difference]: Without dead ends: 488 [2021-11-09 10:43:23,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:43:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-09 10:43:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 335. [2021-11-09 10:43:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.374251497005988) internal successors, (459), 334 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 459 transitions. [2021-11-09 10:43:23,754 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 459 transitions. Word has length 30 [2021-11-09 10:43:23,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:23,755 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 459 transitions. [2021-11-09 10:43:23,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 459 transitions. [2021-11-09 10:43:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 10:43:23,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:23,757 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:23,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:23,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 10:43:23,971 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:23,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1503122194, now seen corresponding path program 12 times [2021-11-09 10:43:23,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:23,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662459823] [2021-11-09 10:43:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:23,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 10:43:24,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:24,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662459823] [2021-11-09 10:43:24,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662459823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:24,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244933482] [2021-11-09 10:43:24,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:43:24,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:24,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:24,317 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:24,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 10:43:25,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 10:43:25,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:25,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 10:43:25,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 10:43:25,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244933482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:25,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:25,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 23 [2021-11-09 10:43:25,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065777741] [2021-11-09 10:43:25,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 10:43:25,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:25,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 10:43:25,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:43:25,586 INFO L87 Difference]: Start difference. First operand 335 states and 459 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:25,963 INFO L93 Difference]: Finished difference Result 390 states and 543 transitions. [2021-11-09 10:43:25,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:43:25,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 10:43:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:25,967 INFO L225 Difference]: With dead ends: 390 [2021-11-09 10:43:25,967 INFO L226 Difference]: Without dead ends: 386 [2021-11-09 10:43:25,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:43:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-09 10:43:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 373. [2021-11-09 10:43:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.3790322580645162) internal successors, (513), 372 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 513 transitions. [2021-11-09 10:43:25,989 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 513 transitions. Word has length 31 [2021-11-09 10:43:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:25,989 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 513 transitions. [2021-11-09 10:43:25,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 513 transitions. [2021-11-09 10:43:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 10:43:25,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:25,991 INFO L513 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:26,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:26,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 10:43:26,218 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:26,218 INFO L85 PathProgramCache]: Analyzing trace with hash -294178047, now seen corresponding path program 21 times [2021-11-09 10:43:26,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:26,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752957268] [2021-11-09 10:43:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:26,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:26,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:26,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752957268] [2021-11-09 10:43:26,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752957268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:26,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728584321] [2021-11-09 10:43:26,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:43:26,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:26,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:26,770 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:26,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 10:43:29,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 10:43:29,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:29,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 10:43:29,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:29,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728584321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:29,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:29,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-09 10:43:29,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903956174] [2021-11-09 10:43:29,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:43:29,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:29,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:43:29,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:43:29,355 INFO L87 Difference]: Start difference. First operand 373 states and 513 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:30,138 INFO L93 Difference]: Finished difference Result 597 states and 932 transitions. [2021-11-09 10:43:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 10:43:30,139 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 10:43:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:30,142 INFO L225 Difference]: With dead ends: 597 [2021-11-09 10:43:30,142 INFO L226 Difference]: Without dead ends: 574 [2021-11-09 10:43:30,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:43:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-09 10:43:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 392. [2021-11-09 10:43:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.3836317135549872) internal successors, (541), 391 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 541 transitions. [2021-11-09 10:43:30,163 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 541 transitions. Word has length 31 [2021-11-09 10:43:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:30,163 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 541 transitions. [2021-11-09 10:43:30,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 541 transitions. [2021-11-09 10:43:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:43:30,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:30,164 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:30,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:30,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:30,365 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash -397070706, now seen corresponding path program 24 times [2021-11-09 10:43:30,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:30,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080552361] [2021-11-09 10:43:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:30,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 10:43:30,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:30,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080552361] [2021-11-09 10:43:30,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080552361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:30,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896200352] [2021-11-09 10:43:30,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:43:30,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:30,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:30,622 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:30,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 10:43:31,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 10:43:31,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:31,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 10:43:31,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 10:43:31,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896200352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:31,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:31,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 10:43:31,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156365975] [2021-11-09 10:43:31,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 10:43:31,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:31,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 10:43:31,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:43:31,753 INFO L87 Difference]: Start difference. First operand 392 states and 541 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:32,213 INFO L93 Difference]: Finished difference Result 453 states and 602 transitions. [2021-11-09 10:43:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:43:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 10:43:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:32,232 INFO L225 Difference]: With dead ends: 453 [2021-11-09 10:43:32,243 INFO L226 Difference]: Without dead ends: 436 [2021-11-09 10:43:32,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:43:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-09 10:43:32,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 392. [2021-11-09 10:43:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.381074168797954) internal successors, (540), 391 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 540 transitions. [2021-11-09 10:43:32,273 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 540 transitions. Word has length 32 [2021-11-09 10:43:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:32,273 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 540 transitions. [2021-11-09 10:43:32,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 540 transitions. [2021-11-09 10:43:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:43:32,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:32,276 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:32,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-11-09 10:43:32,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:32,494 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:32,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:32,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2092779762, now seen corresponding path program 13 times [2021-11-09 10:43:32,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:32,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147621210] [2021-11-09 10:43:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:32,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 10:43:32,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:32,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147621210] [2021-11-09 10:43:32,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147621210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:32,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602617842] [2021-11-09 10:43:32,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:43:32,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:32,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:32,813 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:32,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 10:43:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:34,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 10:43:34,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 10:43:34,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602617842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:34,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:34,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-11-09 10:43:34,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067871596] [2021-11-09 10:43:34,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:43:34,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:43:34,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:43:34,434 INFO L87 Difference]: Start difference. First operand 392 states and 540 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:35,132 INFO L93 Difference]: Finished difference Result 456 states and 604 transitions. [2021-11-09 10:43:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 10:43:35,132 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 10:43:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:35,134 INFO L225 Difference]: With dead ends: 456 [2021-11-09 10:43:35,134 INFO L226 Difference]: Without dead ends: 420 [2021-11-09 10:43:35,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:43:35,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-09 10:43:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 391. [2021-11-09 10:43:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.3717948717948718) internal successors, (535), 390 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 535 transitions. [2021-11-09 10:43:35,154 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 535 transitions. Word has length 32 [2021-11-09 10:43:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:35,155 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 535 transitions. [2021-11-09 10:43:35,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 535 transitions. [2021-11-09 10:43:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:43:35,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:35,156 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:35,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-09 10:43:35,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-09 10:43:35,378 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash -967903620, now seen corresponding path program 25 times [2021-11-09 10:43:35,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:35,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729576728] [2021-11-09 10:43:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:35,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 10:43:35,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:35,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729576728] [2021-11-09 10:43:35,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729576728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:35,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783165578] [2021-11-09 10:43:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:43:35,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:35,613 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:35,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 10:43:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:36,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 10:43:36,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 10:43:36,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783165578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:36,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:36,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 10:43:36,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051653451] [2021-11-09 10:43:36,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 10:43:36,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:36,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 10:43:36,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:43:36,621 INFO L87 Difference]: Start difference. First operand 391 states and 535 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:37,007 INFO L93 Difference]: Finished difference Result 465 states and 609 transitions. [2021-11-09 10:43:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 10:43:37,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 10:43:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:37,010 INFO L225 Difference]: With dead ends: 465 [2021-11-09 10:43:37,010 INFO L226 Difference]: Without dead ends: 448 [2021-11-09 10:43:37,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:43:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-09 10:43:37,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 391. [2021-11-09 10:43:37,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.3692307692307693) internal successors, (534), 390 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:37,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 534 transitions. [2021-11-09 10:43:37,030 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 534 transitions. Word has length 32 [2021-11-09 10:43:37,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:37,030 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 534 transitions. [2021-11-09 10:43:37,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:37,030 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 534 transitions. [2021-11-09 10:43:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:43:37,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:37,031 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:37,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-09 10:43:37,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:37,234 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:37,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:37,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2094696242, now seen corresponding path program 26 times [2021-11-09 10:43:37,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:37,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987193614] [2021-11-09 10:43:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:37,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-09 10:43:37,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:37,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987193614] [2021-11-09 10:43:37,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987193614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:37,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834086301] [2021-11-09 10:43:37,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:43:37,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:37,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:37,470 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:37,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-09 10:43:38,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:43:38,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:38,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 10:43:38,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-09 10:43:38,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834086301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:38,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:38,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 10:43:38,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120055220] [2021-11-09 10:43:38,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 10:43:38,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:38,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 10:43:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:43:38,467 INFO L87 Difference]: Start difference. First operand 391 states and 534 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:38,782 INFO L93 Difference]: Finished difference Result 480 states and 623 transitions. [2021-11-09 10:43:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:43:38,783 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 10:43:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:38,785 INFO L225 Difference]: With dead ends: 480 [2021-11-09 10:43:38,785 INFO L226 Difference]: Without dead ends: 463 [2021-11-09 10:43:38,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:43:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-09 10:43:38,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 391. [2021-11-09 10:43:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.3666666666666667) internal successors, (533), 390 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 533 transitions. [2021-11-09 10:43:38,811 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 533 transitions. Word has length 32 [2021-11-09 10:43:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:38,811 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 533 transitions. [2021-11-09 10:43:38,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 533 transitions. [2021-11-09 10:43:38,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:43:38,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:38,813 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:38,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-11-09 10:43:39,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:39,015 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:39,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:39,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1194091580, now seen corresponding path program 27 times [2021-11-09 10:43:39,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:39,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928894737] [2021-11-09 10:43:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:39,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 10:43:39,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:39,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928894737] [2021-11-09 10:43:39,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928894737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:39,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146852402] [2021-11-09 10:43:39,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:43:39,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:39,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:39,217 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:39,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-09 10:43:40,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:43:40,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:40,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:43:40,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-09 10:43:40,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146852402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:40,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:40,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 19 [2021-11-09 10:43:40,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194707094] [2021-11-09 10:43:40,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:43:40,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:43:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:43:40,242 INFO L87 Difference]: Start difference. First operand 391 states and 533 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:40,772 INFO L93 Difference]: Finished difference Result 514 states and 657 transitions. [2021-11-09 10:43:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 10:43:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 10:43:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:40,775 INFO L225 Difference]: With dead ends: 514 [2021-11-09 10:43:40,775 INFO L226 Difference]: Without dead ends: 464 [2021-11-09 10:43:40,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:43:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-09 10:43:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 370. [2021-11-09 10:43:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.3495934959349594) internal successors, (498), 369 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 498 transitions. [2021-11-09 10:43:40,795 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 498 transitions. Word has length 32 [2021-11-09 10:43:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:40,795 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 498 transitions. [2021-11-09 10:43:40,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 498 transitions. [2021-11-09 10:43:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:43:40,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:40,797 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:40,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:41,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-09 10:43:41,018 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash 335693884, now seen corresponding path program 22 times [2021-11-09 10:43:41,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:41,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972400926] [2021-11-09 10:43:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:41,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:41,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:41,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972400926] [2021-11-09 10:43:41,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972400926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:41,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298670480] [2021-11-09 10:43:41,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:43:41,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:41,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:41,485 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:41,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-09 10:43:42,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:43:42,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:42,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:43:42,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:42,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298670480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:42,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:42,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-09 10:43:42,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358594404] [2021-11-09 10:43:42,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:43:42,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:42,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:43:42,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:43:42,631 INFO L87 Difference]: Start difference. First operand 370 states and 498 transitions. Second operand has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:43,549 INFO L93 Difference]: Finished difference Result 578 states and 884 transitions. [2021-11-09 10:43:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 10:43:43,550 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 10:43:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:43,553 INFO L225 Difference]: With dead ends: 578 [2021-11-09 10:43:43,553 INFO L226 Difference]: Without dead ends: 554 [2021-11-09 10:43:43,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:43:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-09 10:43:43,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 388. [2021-11-09 10:43:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.3540051679586564) internal successors, (524), 387 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 524 transitions. [2021-11-09 10:43:43,587 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 524 transitions. Word has length 32 [2021-11-09 10:43:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:43,588 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 524 transitions. [2021-11-09 10:43:43,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:43,588 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 524 transitions. [2021-11-09 10:43:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 10:43:43,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:43,590 INFO L513 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:43,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:43,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-09 10:43:43,794 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:43,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1613112735, now seen corresponding path program 23 times [2021-11-09 10:43:43,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:43,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813878068] [2021-11-09 10:43:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:43,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:44,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:44,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813878068] [2021-11-09 10:43:44,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813878068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:44,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740025272] [2021-11-09 10:43:44,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:43:44,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:44,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:44,332 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:44,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-09 10:43:49,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-09 10:43:49,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:49,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 10:43:49,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:49,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740025272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:49,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:49,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-09 10:43:49,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835022151] [2021-11-09 10:43:49,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 10:43:49,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 10:43:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:43:49,817 INFO L87 Difference]: Start difference. First operand 388 states and 524 transitions. Second operand has 28 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:50,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:50,710 INFO L93 Difference]: Finished difference Result 603 states and 924 transitions. [2021-11-09 10:43:50,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 10:43:50,710 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-09 10:43:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:50,713 INFO L225 Difference]: With dead ends: 603 [2021-11-09 10:43:50,713 INFO L226 Difference]: Without dead ends: 579 [2021-11-09 10:43:50,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:43:50,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-09 10:43:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 406. [2021-11-09 10:43:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.3580246913580247) internal successors, (550), 405 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 550 transitions. [2021-11-09 10:43:50,736 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 550 transitions. Word has length 33 [2021-11-09 10:43:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:50,736 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 550 transitions. [2021-11-09 10:43:50,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 550 transitions. [2021-11-09 10:43:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 10:43:50,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:50,737 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:50,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:50,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:50,947 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:50,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1134925732, now seen corresponding path program 28 times [2021-11-09 10:43:50,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:50,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512768179] [2021-11-09 10:43:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:50,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:51,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:51,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512768179] [2021-11-09 10:43:51,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512768179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:51,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313284757] [2021-11-09 10:43:51,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:43:51,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:51,636 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:51,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-09 10:43:52,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:43:52,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:52,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-09 10:43:52,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:55,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313284757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:55,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:55,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30] total 52 [2021-11-09 10:43:55,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433979000] [2021-11-09 10:43:55,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 10:43:55,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:55,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 10:43:55,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2519, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 10:43:55,373 INFO L87 Difference]: Start difference. First operand 406 states and 550 transitions. Second operand has 52 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:57,386 INFO L93 Difference]: Finished difference Result 424 states and 568 transitions. [2021-11-09 10:43:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 10:43:57,386 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 10:43:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:57,388 INFO L225 Difference]: With dead ends: 424 [2021-11-09 10:43:57,388 INFO L226 Difference]: Without dead ends: 420 [2021-11-09 10:43:57,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=180, Invalid=3360, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 10:43:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-09 10:43:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 406. [2021-11-09 10:43:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.3580246913580247) internal successors, (550), 405 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 550 transitions. [2021-11-09 10:43:57,411 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 550 transitions. Word has length 34 [2021-11-09 10:43:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:57,411 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 550 transitions. [2021-11-09 10:43:57,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 550 transitions. [2021-11-09 10:43:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 10:43:57,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:57,412 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:57,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:57,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-09 10:43:57,613 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:57,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1922956892, now seen corresponding path program 29 times [2021-11-09 10:43:57,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:57,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568278816] [2021-11-09 10:43:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:57,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 10:43:57,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:57,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568278816] [2021-11-09 10:43:57,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568278816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:57,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919536950] [2021-11-09 10:43:57,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:43:57,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:57,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:57,900 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:57,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-09 10:43:59,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 10:43:59,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:59,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 10:43:59,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 10:43:59,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919536950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:59,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:59,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 10:43:59,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560810787] [2021-11-09 10:43:59,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:43:59,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:43:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:43:59,764 INFO L87 Difference]: Start difference. First operand 406 states and 550 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:00,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:00,138 INFO L93 Difference]: Finished difference Result 472 states and 616 transitions. [2021-11-09 10:44:00,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:44:00,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 10:44:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:00,141 INFO L225 Difference]: With dead ends: 472 [2021-11-09 10:44:00,141 INFO L226 Difference]: Without dead ends: 454 [2021-11-09 10:44:00,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:44:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-09 10:44:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 406. [2021-11-09 10:44:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.3555555555555556) internal successors, (549), 405 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 549 transitions. [2021-11-09 10:44:00,176 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 549 transitions. Word has length 34 [2021-11-09 10:44:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:00,177 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 549 transitions. [2021-11-09 10:44:00,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 549 transitions. [2021-11-09 10:44:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 10:44:00,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:00,178 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:00,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:00,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:00,387 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash -688208292, now seen corresponding path program 14 times [2021-11-09 10:44:00,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:00,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035756445] [2021-11-09 10:44:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:00,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 10:44:00,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:00,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035756445] [2021-11-09 10:44:00,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035756445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:00,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46616068] [2021-11-09 10:44:00,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:00,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:00,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:00,700 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:00,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-09 10:44:01,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:01,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:01,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 10:44:01,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 10:44:01,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46616068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:01,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:01,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 26 [2021-11-09 10:44:01,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822999428] [2021-11-09 10:44:01,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:44:01,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:01,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:44:01,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:44:01,920 INFO L87 Difference]: Start difference. First operand 406 states and 549 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:02,277 INFO L93 Difference]: Finished difference Result 482 states and 658 transitions. [2021-11-09 10:44:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:44:02,277 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 10:44:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:02,280 INFO L225 Difference]: With dead ends: 482 [2021-11-09 10:44:02,280 INFO L226 Difference]: Without dead ends: 478 [2021-11-09 10:44:02,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:44:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-09 10:44:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 449. [2021-11-09 10:44:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.3616071428571428) internal successors, (610), 448 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 610 transitions. [2021-11-09 10:44:02,341 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 610 transitions. Word has length 34 [2021-11-09 10:44:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:02,342 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 610 transitions. [2021-11-09 10:44:02,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 610 transitions. [2021-11-09 10:44:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 10:44:02,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:02,343 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:02,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:02,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-09 10:44:02,544 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:02,545 INFO L85 PathProgramCache]: Analyzing trace with hash -723678292, now seen corresponding path program 30 times [2021-11-09 10:44:02,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:02,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213906320] [2021-11-09 10:44:02,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:02,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 10:44:02,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:02,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213906320] [2021-11-09 10:44:02,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213906320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:02,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223136964] [2021-11-09 10:44:02,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:44:02,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:02,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:02,760 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:02,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-09 10:44:04,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 10:44:04,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:04,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 10:44:04,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 10:44:04,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223136964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:04,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:04,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 10:44:04,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391728839] [2021-11-09 10:44:04,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:44:04,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:04,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:44:04,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:44:04,185 INFO L87 Difference]: Start difference. First operand 449 states and 610 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:04,672 INFO L93 Difference]: Finished difference Result 540 states and 701 transitions. [2021-11-09 10:44:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 10:44:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 10:44:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:04,676 INFO L225 Difference]: With dead ends: 540 [2021-11-09 10:44:04,677 INFO L226 Difference]: Without dead ends: 522 [2021-11-09 10:44:04,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:44:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-09 10:44:04,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 449. [2021-11-09 10:44:04,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.359375) internal successors, (609), 448 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 609 transitions. [2021-11-09 10:44:04,720 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 609 transitions. Word has length 34 [2021-11-09 10:44:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:04,721 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 609 transitions. [2021-11-09 10:44:04,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 609 transitions. [2021-11-09 10:44:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 10:44:04,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:04,722 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:04,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:04,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:04,931 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:04,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:04,932 INFO L85 PathProgramCache]: Analyzing trace with hash -254864292, now seen corresponding path program 31 times [2021-11-09 10:44:04,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:04,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810116979] [2021-11-09 10:44:04,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:04,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-09 10:44:05,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:05,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810116979] [2021-11-09 10:44:05,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810116979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:05,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695912265] [2021-11-09 10:44:05,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:44:05,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:05,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:05,213 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:05,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-09 10:44:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:06,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 10:44:06,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-09 10:44:06,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695912265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:06,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:06,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 10:44:06,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818119423] [2021-11-09 10:44:06,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:44:06,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:06,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:44:06,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:44:06,397 INFO L87 Difference]: Start difference. First operand 449 states and 609 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:06,760 INFO L93 Difference]: Finished difference Result 557 states and 717 transitions. [2021-11-09 10:44:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:44:06,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 10:44:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:06,763 INFO L225 Difference]: With dead ends: 557 [2021-11-09 10:44:06,763 INFO L226 Difference]: Without dead ends: 539 [2021-11-09 10:44:06,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:44:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-09 10:44:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 449. [2021-11-09 10:44:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.3571428571428572) internal successors, (608), 448 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 608 transitions. [2021-11-09 10:44:06,789 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 608 transitions. Word has length 34 [2021-11-09 10:44:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:06,789 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 608 transitions. [2021-11-09 10:44:06,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 608 transitions. [2021-11-09 10:44:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 10:44:06,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:06,790 INFO L513 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:06,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:06,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:06,991 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:06,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:06,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1896575780, now seen corresponding path program 24 times [2021-11-09 10:44:06,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:06,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87276444] [2021-11-09 10:44:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:06,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:07,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:07,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87276444] [2021-11-09 10:44:07,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87276444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:07,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529768760] [2021-11-09 10:44:07,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:44:07,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:07,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:07,584 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:07,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-09 10:44:10,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 10:44:10,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:10,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 10:44:10,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:10,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529768760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:10,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:10,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-09 10:44:10,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378693171] [2021-11-09 10:44:10,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 10:44:10,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:10,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 10:44:10,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:44:10,537 INFO L87 Difference]: Start difference. First operand 449 states and 608 transitions. Second operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:11,557 INFO L93 Difference]: Finished difference Result 700 states and 1078 transitions. [2021-11-09 10:44:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 10:44:11,558 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 10:44:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:11,561 INFO L225 Difference]: With dead ends: 700 [2021-11-09 10:44:11,561 INFO L226 Difference]: Without dead ends: 674 [2021-11-09 10:44:11,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:44:11,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-11-09 10:44:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 469. [2021-11-09 10:44:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.3611111111111112) internal successors, (637), 468 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 637 transitions. [2021-11-09 10:44:11,590 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 637 transitions. Word has length 34 [2021-11-09 10:44:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:11,590 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 637 transitions. [2021-11-09 10:44:11,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 637 transitions. [2021-11-09 10:44:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 10:44:11,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:11,591 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:11,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-09 10:44:11,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:11,792 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:11,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash -821293918, now seen corresponding path program 32 times [2021-11-09 10:44:11,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:11,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250396573] [2021-11-09 10:44:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:11,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 10:44:11,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:11,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250396573] [2021-11-09 10:44:11,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250396573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:11,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609678414] [2021-11-09 10:44:11,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:11,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:11,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:11,982 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:12,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-09 10:44:13,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:13,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:13,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 10:44:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 10:44:13,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609678414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:13,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:13,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-11-09 10:44:13,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735388780] [2021-11-09 10:44:13,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:44:13,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:13,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:44:13,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:44:13,173 INFO L87 Difference]: Start difference. First operand 469 states and 637 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:13,319 INFO L93 Difference]: Finished difference Result 495 states and 664 transitions. [2021-11-09 10:44:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:44:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 10:44:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:13,322 INFO L225 Difference]: With dead ends: 495 [2021-11-09 10:44:13,322 INFO L226 Difference]: Without dead ends: 468 [2021-11-09 10:44:13,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:44:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-09 10:44:13,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 466. [2021-11-09 10:44:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.3612903225806452) internal successors, (633), 465 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 633 transitions. [2021-11-09 10:44:13,350 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 633 transitions. Word has length 35 [2021-11-09 10:44:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:13,350 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 633 transitions. [2021-11-09 10:44:13,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 633 transitions. [2021-11-09 10:44:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 10:44:13,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:13,351 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:13,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-09 10:44:13,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:13,552 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:13,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1184728514, now seen corresponding path program 15 times [2021-11-09 10:44:13,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:13,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793491858] [2021-11-09 10:44:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:13,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 10:44:13,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:13,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793491858] [2021-11-09 10:44:13,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793491858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:13,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267172734] [2021-11-09 10:44:13,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:13,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:13,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:13,950 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:13,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-09 10:44:15,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:44:15,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:15,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 10:44:15,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 10:44:15,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267172734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:15,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:15,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2021-11-09 10:44:15,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872417040] [2021-11-09 10:44:15,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 10:44:15,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:15,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 10:44:15,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:44:15,798 INFO L87 Difference]: Start difference. First operand 466 states and 633 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:16,647 INFO L93 Difference]: Finished difference Result 553 states and 720 transitions. [2021-11-09 10:44:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 10:44:16,647 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 10:44:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:16,650 INFO L225 Difference]: With dead ends: 553 [2021-11-09 10:44:16,650 INFO L226 Difference]: Without dead ends: 497 [2021-11-09 10:44:16,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=2389, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 10:44:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-09 10:44:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 465. [2021-11-09 10:44:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.3512931034482758) internal successors, (627), 464 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 627 transitions. [2021-11-09 10:44:16,678 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 627 transitions. Word has length 35 [2021-11-09 10:44:16,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:16,678 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 627 transitions. [2021-11-09 10:44:16,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:16,679 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 627 transitions. [2021-11-09 10:44:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 10:44:16,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:16,680 INFO L513 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:16,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:16,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-09 10:44:16,890 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2093995583, now seen corresponding path program 25 times [2021-11-09 10:44:16,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:16,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283416662] [2021-11-09 10:44:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:16,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:17,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:17,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283416662] [2021-11-09 10:44:17,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283416662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:17,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634936850] [2021-11-09 10:44:17,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:44:17,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:17,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:17,607 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:17,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-09 10:44:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:19,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 10:44:19,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:19,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634936850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:19,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:19,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-09 10:44:19,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493861596] [2021-11-09 10:44:19,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 10:44:19,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 10:44:19,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:44:19,239 INFO L87 Difference]: Start difference. First operand 465 states and 627 transitions. Second operand has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:20,446 INFO L93 Difference]: Finished difference Result 736 states and 1125 transitions. [2021-11-09 10:44:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 10:44:20,446 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 10:44:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:20,450 INFO L225 Difference]: With dead ends: 736 [2021-11-09 10:44:20,450 INFO L226 Difference]: Without dead ends: 705 [2021-11-09 10:44:20,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=867, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:44:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-09 10:44:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 485. [2021-11-09 10:44:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.3553719008264462) internal successors, (656), 484 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 656 transitions. [2021-11-09 10:44:20,480 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 656 transitions. Word has length 35 [2021-11-09 10:44:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:20,481 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 656 transitions. [2021-11-09 10:44:20,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:20,481 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 656 transitions. [2021-11-09 10:44:20,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 10:44:20,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:20,482 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:20,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-11-09 10:44:20,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:20,683 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:20,683 INFO L85 PathProgramCache]: Analyzing trace with hash -712215154, now seen corresponding path program 33 times [2021-11-09 10:44:20,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:20,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019058887] [2021-11-09 10:44:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:20,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-09 10:44:20,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:20,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019058887] [2021-11-09 10:44:20,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019058887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:20,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181006222] [2021-11-09 10:44:20,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:20,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:20,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:20,978 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:21,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-09 10:44:22,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:44:22,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:22,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 10:44:22,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-09 10:44:22,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181006222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:22,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:22,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 10:44:22,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468302277] [2021-11-09 10:44:22,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:44:22,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:44:22,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:44:22,925 INFO L87 Difference]: Start difference. First operand 485 states and 656 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:23,378 INFO L93 Difference]: Finished difference Result 574 states and 744 transitions. [2021-11-09 10:44:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:44:23,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 10:44:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:23,381 INFO L225 Difference]: With dead ends: 574 [2021-11-09 10:44:23,381 INFO L226 Difference]: Without dead ends: 555 [2021-11-09 10:44:23,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:44:23,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-09 10:44:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 485. [2021-11-09 10:44:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.353305785123967) internal successors, (655), 484 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 655 transitions. [2021-11-09 10:44:23,412 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 655 transitions. Word has length 36 [2021-11-09 10:44:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:23,412 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 655 transitions. [2021-11-09 10:44:23,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 655 transitions. [2021-11-09 10:44:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 10:44:23,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:23,413 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:23,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-11-09 10:44:23,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:23,614 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:23,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1010756028, now seen corresponding path program 34 times [2021-11-09 10:44:23,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:23,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341307887] [2021-11-09 10:44:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:23,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-09 10:44:23,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:23,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341307887] [2021-11-09 10:44:23,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341307887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:23,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040149677] [2021-11-09 10:44:23,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:23,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:23,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:23,866 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:23,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-09 10:44:24,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:24,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:24,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 10:44:24,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-09 10:44:25,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040149677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:25,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:25,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 10:44:25,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691439252] [2021-11-09 10:44:25,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:44:25,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:44:25,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:44:25,150 INFO L87 Difference]: Start difference. First operand 485 states and 655 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:25,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:25,568 INFO L93 Difference]: Finished difference Result 590 states and 759 transitions. [2021-11-09 10:44:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:44:25,569 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 10:44:25,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:25,572 INFO L225 Difference]: With dead ends: 590 [2021-11-09 10:44:25,572 INFO L226 Difference]: Without dead ends: 571 [2021-11-09 10:44:25,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:44:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-09 10:44:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 485. [2021-11-09 10:44:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.3512396694214877) internal successors, (654), 484 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 654 transitions. [2021-11-09 10:44:25,601 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 654 transitions. Word has length 36 [2021-11-09 10:44:25,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:25,601 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 654 transitions. [2021-11-09 10:44:25,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:25,601 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 654 transitions. [2021-11-09 10:44:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 10:44:25,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:25,602 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:25,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-09 10:44:25,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-09 10:44:25,803 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:25,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:25,803 INFO L85 PathProgramCache]: Analyzing trace with hash -596232242, now seen corresponding path program 35 times [2021-11-09 10:44:25,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:25,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604571729] [2021-11-09 10:44:25,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:25,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-09 10:44:26,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:26,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604571729] [2021-11-09 10:44:26,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604571729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:26,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866621267] [2021-11-09 10:44:26,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:44:26,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:26,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:26,070 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:26,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-09 10:44:28,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 10:44:28,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:28,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 10:44:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-09 10:44:28,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866621267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:28,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 10:44:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028256554] [2021-11-09 10:44:28,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:44:28,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:44:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:44:28,911 INFO L87 Difference]: Start difference. First operand 485 states and 654 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:29,318 INFO L93 Difference]: Finished difference Result 608 states and 776 transitions. [2021-11-09 10:44:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 10:44:29,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 10:44:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:29,322 INFO L225 Difference]: With dead ends: 608 [2021-11-09 10:44:29,322 INFO L226 Difference]: Without dead ends: 589 [2021-11-09 10:44:29,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:44:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-09 10:44:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 485. [2021-11-09 10:44:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.3491735537190082) internal successors, (653), 484 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 653 transitions. [2021-11-09 10:44:29,370 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 653 transitions. Word has length 36 [2021-11-09 10:44:29,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:29,370 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 653 transitions. [2021-11-09 10:44:29,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 653 transitions. [2021-11-09 10:44:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 10:44:29,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:29,371 INFO L513 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:29,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:29,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:29,574 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:29,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:29,574 INFO L85 PathProgramCache]: Analyzing trace with hash 375925116, now seen corresponding path program 26 times [2021-11-09 10:44:29,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:29,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471566518] [2021-11-09 10:44:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:29,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:30,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:30,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471566518] [2021-11-09 10:44:30,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471566518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:30,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361562671] [2021-11-09 10:44:30,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:30,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:30,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:30,176 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:30,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-09 10:44:31,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:31,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-09 10:44:31,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:31,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361562671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:31,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:31,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-09 10:44:31,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069701702] [2021-11-09 10:44:31,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:44:31,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:44:31,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:44:31,585 INFO L87 Difference]: Start difference. First operand 485 states and 653 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:32,688 INFO L93 Difference]: Finished difference Result 764 states and 1167 transitions. [2021-11-09 10:44:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 10:44:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 10:44:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:32,692 INFO L225 Difference]: With dead ends: 764 [2021-11-09 10:44:32,692 INFO L226 Difference]: Without dead ends: 733 [2021-11-09 10:44:32,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:44:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-11-09 10:44:32,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 505. [2021-11-09 10:44:32,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.3531746031746033) internal successors, (682), 504 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 682 transitions. [2021-11-09 10:44:32,723 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 682 transitions. Word has length 36 [2021-11-09 10:44:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:32,723 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 682 transitions. [2021-11-09 10:44:32,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 682 transitions. [2021-11-09 10:44:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:44:32,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:32,724 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:32,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:32,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-09 10:44:32,925 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:32,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:32,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1671893842, now seen corresponding path program 16 times [2021-11-09 10:44:32,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:32,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594621799] [2021-11-09 10:44:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:32,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-09 10:44:33,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:33,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594621799] [2021-11-09 10:44:33,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594621799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:33,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221917351] [2021-11-09 10:44:33,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:33,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:33,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:33,407 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:33,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-09 10:44:34,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:34,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:34,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 10:44:34,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-09 10:44:35,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221917351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:35,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:35,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 29 [2021-11-09 10:44:35,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700468452] [2021-11-09 10:44:35,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 10:44:35,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:35,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 10:44:35,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:44:35,078 INFO L87 Difference]: Start difference. First operand 505 states and 682 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:35,744 INFO L93 Difference]: Finished difference Result 574 states and 788 transitions. [2021-11-09 10:44:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 10:44:35,745 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 10:44:35,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:35,748 INFO L225 Difference]: With dead ends: 574 [2021-11-09 10:44:35,749 INFO L226 Difference]: Without dead ends: 570 [2021-11-09 10:44:35,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:44:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-09 10:44:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 553. [2021-11-09 10:44:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.358695652173913) internal successors, (750), 552 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 750 transitions. [2021-11-09 10:44:35,821 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 750 transitions. Word has length 37 [2021-11-09 10:44:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:35,822 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 750 transitions. [2021-11-09 10:44:35,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 750 transitions. [2021-11-09 10:44:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:44:35,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:35,823 INFO L513 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:35,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:36,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:36,024 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash -365944543, now seen corresponding path program 27 times [2021-11-09 10:44:36,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:36,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425984277] [2021-11-09 10:44:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:36,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:36,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:36,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425984277] [2021-11-09 10:44:36,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425984277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:36,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933840613] [2021-11-09 10:44:36,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:36,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:36,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:36,694 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:36,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-09 10:44:44,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-09 10:44:44,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:44,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-09 10:44:44,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:45,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933840613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:45,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:45,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-11-09 10:44:45,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922612634] [2021-11-09 10:44:45,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:44:45,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:44:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:44:45,193 INFO L87 Difference]: Start difference. First operand 553 states and 750 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:46,378 INFO L93 Difference]: Finished difference Result 872 states and 1342 transitions. [2021-11-09 10:44:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 10:44:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 10:44:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:46,384 INFO L225 Difference]: With dead ends: 872 [2021-11-09 10:44:46,384 INFO L226 Difference]: Without dead ends: 839 [2021-11-09 10:44:46,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:44:46,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-11-09 10:44:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 575. [2021-11-09 10:44:46,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.362369337979094) internal successors, (782), 574 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 782 transitions. [2021-11-09 10:44:46,443 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 782 transitions. Word has length 37 [2021-11-09 10:44:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:46,444 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 782 transitions. [2021-11-09 10:44:46,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 782 transitions. [2021-11-09 10:44:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:44:46,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:46,446 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:46,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:46,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:46,656 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:46,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1521387244, now seen corresponding path program 36 times [2021-11-09 10:44:46,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:46,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272402853] [2021-11-09 10:44:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:46,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:47,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:47,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272402853] [2021-11-09 10:44:47,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272402853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:47,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779209657] [2021-11-09 10:44:47,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:44:47,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:47,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:47,802 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:47,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-09 10:44:49,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 10:44:49,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:49,765 WARN L261 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-09 10:44:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:52,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779209657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:52,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:52,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 35] total 60 [2021-11-09 10:44:52,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695211309] [2021-11-09 10:44:52,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-09 10:44:52,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-09 10:44:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3385, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 10:44:52,318 INFO L87 Difference]: Start difference. First operand 575 states and 782 transitions. Second operand has 60 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:54,432 INFO L93 Difference]: Finished difference Result 598 states and 806 transitions. [2021-11-09 10:44:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 10:44:54,433 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 10:44:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:54,436 INFO L225 Difference]: With dead ends: 598 [2021-11-09 10:44:54,436 INFO L226 Difference]: Without dead ends: 566 [2021-11-09 10:44:54,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=209, Invalid=4483, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 10:44:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-09 10:44:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-09 10:44:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.3663716814159292) internal successors, (772), 565 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 772 transitions. [2021-11-09 10:44:54,470 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 772 transitions. Word has length 38 [2021-11-09 10:44:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:54,470 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 772 transitions. [2021-11-09 10:44:54,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 772 transitions. [2021-11-09 10:44:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:44:54,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:54,471 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:54,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:54,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:54,672 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:54,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:54,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1082447636, now seen corresponding path program 37 times [2021-11-09 10:44:54,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:54,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108884474] [2021-11-09 10:44:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:54,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-09 10:44:54,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:54,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108884474] [2021-11-09 10:44:54,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108884474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:54,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526626692] [2021-11-09 10:44:54,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:44:54,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:54,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:54,947 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:54,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-09 10:44:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:56,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 10:44:56,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-09 10:44:56,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526626692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:56,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:56,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 10:44:56,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413197538] [2021-11-09 10:44:56,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:44:56,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:44:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:44:56,425 INFO L87 Difference]: Start difference. First operand 566 states and 772 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:57,063 INFO L93 Difference]: Finished difference Result 657 states and 862 transitions. [2021-11-09 10:44:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:44:57,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 10:44:57,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:57,074 INFO L225 Difference]: With dead ends: 657 [2021-11-09 10:44:57,082 INFO L226 Difference]: Without dead ends: 637 [2021-11-09 10:44:57,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:44:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-09 10:44:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 566. [2021-11-09 10:44:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.3646017699115045) internal successors, (771), 565 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 771 transitions. [2021-11-09 10:44:57,123 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 771 transitions. Word has length 38 [2021-11-09 10:44:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:57,123 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 771 transitions. [2021-11-09 10:44:57,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 771 transitions. [2021-11-09 10:44:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:44:57,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:57,124 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:57,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:57,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-11-09 10:44:57,325 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1191614094, now seen corresponding path program 17 times [2021-11-09 10:44:57,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:57,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669574580] [2021-11-09 10:44:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:57,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-09 10:44:57,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:57,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669574580] [2021-11-09 10:44:57,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669574580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:57,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287890894] [2021-11-09 10:44:57,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:44:57,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:57,709 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:57,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-09 10:45:00,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 10:45:00,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 10:45:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-09 10:45:01,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287890894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:01,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:01,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2021-11-09 10:45:01,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278775530] [2021-11-09 10:45:01,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 10:45:01,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:01,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 10:45:01,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:45:01,368 INFO L87 Difference]: Start difference. First operand 566 states and 771 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:02,474 INFO L93 Difference]: Finished difference Result 661 states and 866 transitions. [2021-11-09 10:45:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 10:45:02,474 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 10:45:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:02,477 INFO L225 Difference]: With dead ends: 661 [2021-11-09 10:45:02,477 INFO L226 Difference]: Without dead ends: 600 [2021-11-09 10:45:02,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=181, Invalid=3011, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 10:45:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-11-09 10:45:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 565. [2021-11-09 10:45:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.3563829787234043) internal successors, (765), 564 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 765 transitions. [2021-11-09 10:45:02,512 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 765 transitions. Word has length 38 [2021-11-09 10:45:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:02,512 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 765 transitions. [2021-11-09 10:45:02,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 765 transitions. [2021-11-09 10:45:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:45:02,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:02,514 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:02,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-11-09 10:45:02,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:02,715 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash -496246308, now seen corresponding path program 38 times [2021-11-09 10:45:02,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:02,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115162573] [2021-11-09 10:45:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:02,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-09 10:45:03,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:03,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115162573] [2021-11-09 10:45:03,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115162573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:03,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622263692] [2021-11-09 10:45:03,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:03,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:03,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:03,031 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:03,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-09 10:45:04,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:04,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:04,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 10:45:04,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-09 10:45:04,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622263692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:04,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:04,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 10:45:04,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698547329] [2021-11-09 10:45:04,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:45:04,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:04,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:45:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:45:04,536 INFO L87 Difference]: Start difference. First operand 565 states and 765 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:05,094 INFO L93 Difference]: Finished difference Result 672 states and 871 transitions. [2021-11-09 10:45:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 10:45:05,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 10:45:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:05,098 INFO L225 Difference]: With dead ends: 672 [2021-11-09 10:45:05,098 INFO L226 Difference]: Without dead ends: 652 [2021-11-09 10:45:05,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:45:05,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-09 10:45:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 565. [2021-11-09 10:45:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.3546099290780143) internal successors, (764), 564 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 764 transitions. [2021-11-09 10:45:05,136 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 764 transitions. Word has length 38 [2021-11-09 10:45:05,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:05,136 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 764 transitions. [2021-11-09 10:45:05,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 764 transitions. [2021-11-09 10:45:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:45:05,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:05,138 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:05,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-11-09 10:45:05,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:05,339 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:05,339 INFO L85 PathProgramCache]: Analyzing trace with hash -754431252, now seen corresponding path program 39 times [2021-11-09 10:45:05,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:05,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219238226] [2021-11-09 10:45:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:05,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-09 10:45:05,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:05,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219238226] [2021-11-09 10:45:05,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219238226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:05,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723927666] [2021-11-09 10:45:05,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:05,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:05,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:05,630 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:05,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-09 10:45:07,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 10:45:07,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:07,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 10:45:07,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 10:45:07,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723927666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:07,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:07,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2021-11-09 10:45:07,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537640601] [2021-11-09 10:45:07,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:45:07,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:45:07,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:45:07,621 INFO L87 Difference]: Start difference. First operand 565 states and 764 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:08,799 INFO L93 Difference]: Finished difference Result 795 states and 999 transitions. [2021-11-09 10:45:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 10:45:08,800 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 10:45:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:08,801 INFO L225 Difference]: With dead ends: 795 [2021-11-09 10:45:08,802 INFO L226 Difference]: Without dead ends: 624 [2021-11-09 10:45:08,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=2096, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:45:08,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-09 10:45:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 514. [2021-11-09 10:45:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.3216374269005848) internal successors, (678), 513 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 678 transitions. [2021-11-09 10:45:08,841 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 678 transitions. Word has length 38 [2021-11-09 10:45:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:08,841 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 678 transitions. [2021-11-09 10:45:08,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 678 transitions. [2021-11-09 10:45:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:45:08,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:08,843 INFO L513 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:08,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-11-09 10:45:09,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-11-09 10:45:09,053 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:09,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1889067492, now seen corresponding path program 28 times [2021-11-09 10:45:09,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:09,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468285769] [2021-11-09 10:45:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:09,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:09,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:09,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468285769] [2021-11-09 10:45:09,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468285769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:09,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912670019] [2021-11-09 10:45:09,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:45:09,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:09,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:09,854 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:09,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-09 10:45:11,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:45:11,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:11,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 10:45:11,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:11,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912670019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:11,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:11,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-09 10:45:11,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682347399] [2021-11-09 10:45:11,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 10:45:11,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:11,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 10:45:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:45:11,492 INFO L87 Difference]: Start difference. First operand 514 states and 678 transitions. Second operand has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:12,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:12,782 INFO L93 Difference]: Finished difference Result 789 states and 1175 transitions. [2021-11-09 10:45:12,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 10:45:12,782 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 10:45:12,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:12,784 INFO L225 Difference]: With dead ends: 789 [2021-11-09 10:45:12,784 INFO L226 Difference]: Without dead ends: 751 [2021-11-09 10:45:12,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1053, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:45:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-11-09 10:45:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 534. [2021-11-09 10:45:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.324577861163227) internal successors, (706), 533 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 706 transitions. [2021-11-09 10:45:12,820 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 706 transitions. Word has length 38 [2021-11-09 10:45:12,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:12,820 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 706 transitions. [2021-11-09 10:45:12,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 706 transitions. [2021-11-09 10:45:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 10:45:12,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:12,822 INFO L513 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:12,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:13,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-11-09 10:45:13,022 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:13,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:13,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1861238655, now seen corresponding path program 29 times [2021-11-09 10:45:13,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:13,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136730204] [2021-11-09 10:45:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:13,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:13,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:13,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136730204] [2021-11-09 10:45:13,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136730204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:13,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685858512] [2021-11-09 10:45:13,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:45:13,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:13,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:13,739 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:13,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-09 10:45:18,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-09 10:45:18,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:18,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-09 10:45:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:19,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685858512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:19,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:19,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-09 10:45:19,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018573025] [2021-11-09 10:45:19,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 10:45:19,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:19,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 10:45:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:45:19,137 INFO L87 Difference]: Start difference. First operand 534 states and 706 transitions. Second operand has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:20,482 INFO L93 Difference]: Finished difference Result 816 states and 1217 transitions. [2021-11-09 10:45:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:45:20,482 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 10:45:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:20,484 INFO L225 Difference]: With dead ends: 816 [2021-11-09 10:45:20,484 INFO L226 Difference]: Without dead ends: 778 [2021-11-09 10:45:20,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=1119, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:45:20,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-11-09 10:45:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 554. [2021-11-09 10:45:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.3273056057866184) internal successors, (734), 553 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 734 transitions. [2021-11-09 10:45:20,522 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 734 transitions. Word has length 39 [2021-11-09 10:45:20,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:20,522 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 734 transitions. [2021-11-09 10:45:20,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:20,522 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 734 transitions. [2021-11-09 10:45:20,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 10:45:20,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:20,523 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:20,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:20,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-11-09 10:45:20,724 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:20,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:20,724 INFO L85 PathProgramCache]: Analyzing trace with hash 628993852, now seen corresponding path program 40 times [2021-11-09 10:45:20,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:20,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010522122] [2021-11-09 10:45:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:20,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 10:45:21,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:21,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010522122] [2021-11-09 10:45:21,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010522122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:21,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678612960] [2021-11-09 10:45:21,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:45:21,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:21,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:21,047 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:21,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-09 10:45:22,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:45:22,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:22,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 10:45:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 10:45:22,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678612960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:22,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:22,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-09 10:45:22,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213249898] [2021-11-09 10:45:22,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:45:22,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:22,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:45:22,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:45:22,636 INFO L87 Difference]: Start difference. First operand 554 states and 734 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:23,188 INFO L93 Difference]: Finished difference Result 651 states and 830 transitions. [2021-11-09 10:45:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 10:45:23,189 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 10:45:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:23,190 INFO L225 Difference]: With dead ends: 651 [2021-11-09 10:45:23,190 INFO L226 Difference]: Without dead ends: 630 [2021-11-09 10:45:23,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:45:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-09 10:45:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 554. [2021-11-09 10:45:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.3254972875226039) internal successors, (733), 553 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 733 transitions. [2021-11-09 10:45:23,228 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 733 transitions. Word has length 40 [2021-11-09 10:45:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:23,228 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 733 transitions. [2021-11-09 10:45:23,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 733 transitions. [2021-11-09 10:45:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 10:45:23,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:23,229 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:23,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:23,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-09 10:45:23,434 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash -805056868, now seen corresponding path program 18 times [2021-11-09 10:45:23,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:23,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440072589] [2021-11-09 10:45:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:23,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-09 10:45:23,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:23,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440072589] [2021-11-09 10:45:23,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440072589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:23,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705363150] [2021-11-09 10:45:23,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:45:23,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:23,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:23,878 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:23,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-09 10:45:25,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 10:45:25,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 10:45:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-09 10:45:26,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705363150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:26,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:26,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 33 [2021-11-09 10:45:26,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404446586] [2021-11-09 10:45:26,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 10:45:26,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:26,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 10:45:26,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:45:26,192 INFO L87 Difference]: Start difference. First operand 554 states and 733 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:17,732 INFO L93 Difference]: Finished difference Result 1269 states and 1798 transitions. [2021-11-09 10:47:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-09 10:47:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 10:47:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:17,734 INFO L225 Difference]: With dead ends: 1269 [2021-11-09 10:47:17,734 INFO L226 Difference]: Without dead ends: 1264 [2021-11-09 10:47:17,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2364 ImplicationChecksByTransitivity, 98.8s TimeCoverageRelationStatistics Valid=1958, Invalid=5698, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 10:47:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-11-09 10:47:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 873. [2021-11-09 10:47:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.4977064220183487) internal successors, (1306), 872 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1306 transitions. [2021-11-09 10:47:17,785 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1306 transitions. Word has length 40 [2021-11-09 10:47:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:17,785 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1306 transitions. [2021-11-09 10:47:17,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1306 transitions. [2021-11-09 10:47:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 10:47:17,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:17,787 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:17,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-11-09 10:47:17,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:17,988 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash -5329778, now seen corresponding path program 41 times [2021-11-09 10:47:17,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:17,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398185342] [2021-11-09 10:47:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:17,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-09 10:47:18,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:18,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398185342] [2021-11-09 10:47:18,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398185342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:18,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120740640] [2021-11-09 10:47:18,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:47:18,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:18,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:18,255 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:18,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-09 10:47:22,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 10:47:22,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:22,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 10:47:22,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-09 10:47:22,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120740640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:22,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:22,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-09 10:47:22,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816028161] [2021-11-09 10:47:22,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:47:22,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:22,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:47:22,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:47:22,798 INFO L87 Difference]: Start difference. First operand 873 states and 1306 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:23,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:23,311 INFO L93 Difference]: Finished difference Result 1016 states and 1448 transitions. [2021-11-09 10:47:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 10:47:23,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 10:47:23,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:23,313 INFO L225 Difference]: With dead ends: 1016 [2021-11-09 10:47:23,313 INFO L226 Difference]: Without dead ends: 995 [2021-11-09 10:47:23,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:47:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-11-09 10:47:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 873. [2021-11-09 10:47:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.496559633027523) internal successors, (1305), 872 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1305 transitions. [2021-11-09 10:47:23,361 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1305 transitions. Word has length 40 [2021-11-09 10:47:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:23,361 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1305 transitions. [2021-11-09 10:47:23,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1305 transitions. [2021-11-09 10:47:23,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 10:47:23,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:23,363 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:23,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:23,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:23,563 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:23,564 INFO L85 PathProgramCache]: Analyzing trace with hash -998544708, now seen corresponding path program 30 times [2021-11-09 10:47:23,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:23,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503705375] [2021-11-09 10:47:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:23,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:24,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:24,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503705375] [2021-11-09 10:47:24,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503705375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:24,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188492409] [2021-11-09 10:47:24,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:47:24,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:24,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:24,234 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:24,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-09 10:47:29,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-09 10:47:29,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:29,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-09 10:47:29,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:29,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188492409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:29,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:29,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-09 10:47:29,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038859112] [2021-11-09 10:47:29,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 10:47:29,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:29,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 10:47:29,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:47:29,267 INFO L87 Difference]: Start difference. First operand 873 states and 1305 transitions. Second operand has 35 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:30,568 INFO L93 Difference]: Finished difference Result 1248 states and 1992 transitions. [2021-11-09 10:47:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 10:47:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 10:47:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:30,571 INFO L225 Difference]: With dead ends: 1248 [2021-11-09 10:47:30,571 INFO L226 Difference]: Without dead ends: 1203 [2021-11-09 10:47:30,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:47:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-11-09 10:47:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 907. [2021-11-09 10:47:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 1.5) internal successors, (1359), 906 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1359 transitions. [2021-11-09 10:47:30,626 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1359 transitions. Word has length 40 [2021-11-09 10:47:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:30,627 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1359 transitions. [2021-11-09 10:47:30,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1359 transitions. [2021-11-09 10:47:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 10:47:30,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:30,628 INFO L513 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:30,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:30,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-11-09 10:47:30,828 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:30,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash -24836127, now seen corresponding path program 31 times [2021-11-09 10:47:30,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:30,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754174680] [2021-11-09 10:47:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:30,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:31,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:31,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754174680] [2021-11-09 10:47:31,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754174680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:31,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295298295] [2021-11-09 10:47:31,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:47:31,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:31,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:31,557 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:31,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-09 10:47:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:32,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 10:47:32,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:33,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295298295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:33,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:33,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-09 10:47:33,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679912331] [2021-11-09 10:47:33,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 10:47:33,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:33,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 10:47:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:47:33,061 INFO L87 Difference]: Start difference. First operand 907 states and 1359 transitions. Second operand has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:34,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:34,456 INFO L93 Difference]: Finished difference Result 1291 states and 2064 transitions. [2021-11-09 10:47:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 10:47:34,457 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 10:47:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:34,459 INFO L225 Difference]: With dead ends: 1291 [2021-11-09 10:47:34,459 INFO L226 Difference]: Without dead ends: 1246 [2021-11-09 10:47:34,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=1257, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:47:34,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-11-09 10:47:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 941. [2021-11-09 10:47:34,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 1.5031914893617022) internal successors, (1413), 940 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1413 transitions. [2021-11-09 10:47:34,514 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1413 transitions. Word has length 41 [2021-11-09 10:47:34,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:34,514 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 1413 transitions. [2021-11-09 10:47:34,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1413 transitions. [2021-11-09 10:47:34,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 10:47:34,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:34,515 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:34,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-11-09 10:47:34,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:34,718 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash -943470244, now seen corresponding path program 42 times [2021-11-09 10:47:34,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:34,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221740467] [2021-11-09 10:47:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:34,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:35,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:35,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221740467] [2021-11-09 10:47:35,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221740467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:35,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905924700] [2021-11-09 10:47:35,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:47:35,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:35,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:35,715 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:35,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-09 10:47:49,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 10:47:49,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:49,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-09 10:47:49,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:52,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905924700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:52,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:52,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 39] total 67 [2021-11-09 10:47:52,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457344693] [2021-11-09 10:47:52,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-09 10:47:52,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:52,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-09 10:47:52,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=4249, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 10:47:52,175 INFO L87 Difference]: Start difference. First operand 941 states and 1413 transitions. Second operand has 67 states, 67 states have (on average 1.208955223880597) internal successors, (81), 67 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:54,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:54,528 INFO L93 Difference]: Finished difference Result 963 states and 1434 transitions. [2021-11-09 10:47:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 10:47:54,529 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.208955223880597) internal successors, (81), 67 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 10:47:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:54,531 INFO L225 Difference]: With dead ends: 963 [2021-11-09 10:47:54,531 INFO L226 Difference]: Without dead ends: 931 [2021-11-09 10:47:54,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=232, Invalid=5620, Unknown=0, NotChecked=0, Total=5852 [2021-11-09 10:47:54,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-11-09 10:47:54,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 931. [2021-11-09 10:47:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 1.5075268817204301) internal successors, (1402), 930 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1402 transitions. [2021-11-09 10:47:54,594 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1402 transitions. Word has length 42 [2021-11-09 10:47:54,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:54,595 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1402 transitions. [2021-11-09 10:47:54,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.208955223880597) internal successors, (81), 67 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:54,595 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1402 transitions. [2021-11-09 10:47:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 10:47:54,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:54,596 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:54,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:54,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:54,797 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:54,797 INFO L85 PathProgramCache]: Analyzing trace with hash -10817700, now seen corresponding path program 43 times [2021-11-09 10:47:54,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:54,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063598174] [2021-11-09 10:47:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:54,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-09 10:47:55,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:55,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063598174] [2021-11-09 10:47:55,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063598174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:55,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679829946] [2021-11-09 10:47:55,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:47:55,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:55,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:55,079 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:55,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-09 10:47:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:56,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:47:56,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-09 10:47:56,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679829946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:56,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:56,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 10:47:56,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292066289] [2021-11-09 10:47:56,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:47:56,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:56,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:47:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:47:56,677 INFO L87 Difference]: Start difference. First operand 931 states and 1402 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:57,342 INFO L93 Difference]: Finished difference Result 1045 states and 1515 transitions. [2021-11-09 10:47:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 10:47:57,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 10:47:57,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:57,345 INFO L225 Difference]: With dead ends: 1045 [2021-11-09 10:47:57,345 INFO L226 Difference]: Without dead ends: 1023 [2021-11-09 10:47:57,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:47:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-11-09 10:47:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 931. [2021-11-09 10:47:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 1.5064516129032257) internal successors, (1401), 930 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1401 transitions. [2021-11-09 10:47:57,422 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1401 transitions. Word has length 42 [2021-11-09 10:47:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:57,422 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1401 transitions. [2021-11-09 10:47:57,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1401 transitions. [2021-11-09 10:47:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 10:47:57,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:57,424 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:57,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:57,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:57,642 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:57,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1401573420, now seen corresponding path program 44 times [2021-11-09 10:47:57,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:57,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273437071] [2021-11-09 10:47:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:57,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-09 10:47:57,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:57,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273437071] [2021-11-09 10:47:57,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273437071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:57,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201035236] [2021-11-09 10:47:57,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:47:57,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:57,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:57,994 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:58,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-09 10:47:59,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:47:59,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:59,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:47:59,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-09 10:47:59,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201035236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:59,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:59,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 10:47:59,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972739649] [2021-11-09 10:47:59,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:47:59,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:47:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:47:59,765 INFO L87 Difference]: Start difference. First operand 931 states and 1401 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:00,388 INFO L93 Difference]: Finished difference Result 1063 states and 1532 transitions. [2021-11-09 10:48:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 10:48:00,389 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 10:48:00,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:00,390 INFO L225 Difference]: With dead ends: 1063 [2021-11-09 10:48:00,390 INFO L226 Difference]: Without dead ends: 1041 [2021-11-09 10:48:00,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:48:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-11-09 10:48:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 931. [2021-11-09 10:48:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 1.5053763440860215) internal successors, (1400), 930 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1400 transitions. [2021-11-09 10:48:00,443 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1400 transitions. Word has length 42 [2021-11-09 10:48:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:00,443 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1400 transitions. [2021-11-09 10:48:00,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1400 transitions. [2021-11-09 10:48:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 10:48:00,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:00,444 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:00,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:00,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:00,645 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:00,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:00,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1585681756, now seen corresponding path program 45 times [2021-11-09 10:48:00,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:00,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404644455] [2021-11-09 10:48:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:00,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-09 10:48:00,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:00,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404644455] [2021-11-09 10:48:00,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404644455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:00,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725757964] [2021-11-09 10:48:00,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:48:00,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:00,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:00,950 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:00,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-09 10:48:03,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:48:03,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:03,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:48:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 40 proven. 20 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-09 10:48:03,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725757964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:03,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:03,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 30 [2021-11-09 10:48:03,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812789483] [2021-11-09 10:48:03,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 10:48:03,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:03,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 10:48:03,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=804, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:48:03,794 INFO L87 Difference]: Start difference. First operand 931 states and 1400 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:05,568 INFO L93 Difference]: Finished difference Result 1170 states and 1642 transitions. [2021-11-09 10:48:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 10:48:05,569 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 10:48:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:05,570 INFO L225 Difference]: With dead ends: 1170 [2021-11-09 10:48:05,571 INFO L226 Difference]: Without dead ends: 1038 [2021-11-09 10:48:05,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=206, Invalid=3216, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 10:48:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-11-09 10:48:05,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 903. [2021-11-09 10:48:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 1.4977827050997783) internal successors, (1351), 902 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1351 transitions. [2021-11-09 10:48:05,652 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1351 transitions. Word has length 42 [2021-11-09 10:48:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:05,652 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 1351 transitions. [2021-11-09 10:48:05,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1351 transitions. [2021-11-09 10:48:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 10:48:05,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:05,655 INFO L513 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:05,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:05,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:05,865 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:05,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:05,865 INFO L85 PathProgramCache]: Analyzing trace with hash 95358812, now seen corresponding path program 32 times [2021-11-09 10:48:05,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:05,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293682153] [2021-11-09 10:48:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:05,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:06,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:06,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293682153] [2021-11-09 10:48:06,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293682153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:06,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716103618] [2021-11-09 10:48:06,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:48:06,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:06,593 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:06,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-09 10:48:07,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:48:07,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 10:48:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:08,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716103618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:08,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:08,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-09 10:48:08,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590119238] [2021-11-09 10:48:08,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 10:48:08,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 10:48:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:48:08,226 INFO L87 Difference]: Start difference. First operand 903 states and 1351 transitions. Second operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:09,709 INFO L93 Difference]: Finished difference Result 1267 states and 2011 transitions. [2021-11-09 10:48:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 10:48:09,709 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 10:48:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:09,711 INFO L225 Difference]: With dead ends: 1267 [2021-11-09 10:48:09,711 INFO L226 Difference]: Without dead ends: 1218 [2021-11-09 10:48:09,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:48:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-11-09 10:48:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 936. [2021-11-09 10:48:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.5005347593582887) internal successors, (1403), 935 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1403 transitions. [2021-11-09 10:48:09,790 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1403 transitions. Word has length 42 [2021-11-09 10:48:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:09,790 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1403 transitions. [2021-11-09 10:48:09,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1403 transitions. [2021-11-09 10:48:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 10:48:09,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:09,792 INFO L513 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:09,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:09,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:09,994 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:09,994 INFO L85 PathProgramCache]: Analyzing trace with hash -473565375, now seen corresponding path program 33 times [2021-11-09 10:48:09,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:09,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69773620] [2021-11-09 10:48:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:09,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:10,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:10,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69773620] [2021-11-09 10:48:10,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69773620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:10,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5439800] [2021-11-09 10:48:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:48:10,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:10,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:10,843 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:10,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-09 10:48:22,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-09 10:48:22,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:22,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 10:48:22,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:22,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5439800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:22,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:22,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-09 10:48:22,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125389524] [2021-11-09 10:48:22,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 10:48:22,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:22,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 10:48:22,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:48:22,622 INFO L87 Difference]: Start difference. First operand 936 states and 1403 transitions. Second operand has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:24,302 INFO L93 Difference]: Finished difference Result 1308 states and 2079 transitions. [2021-11-09 10:48:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 10:48:24,302 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 10:48:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:24,304 INFO L225 Difference]: With dead ends: 1308 [2021-11-09 10:48:24,305 INFO L226 Difference]: Without dead ends: 1259 [2021-11-09 10:48:24,305 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:48:24,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-11-09 10:48:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 969. [2021-11-09 10:48:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 1.503099173553719) internal successors, (1455), 968 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1455 transitions. [2021-11-09 10:48:24,369 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1455 transitions. Word has length 43 [2021-11-09 10:48:24,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:24,369 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1455 transitions. [2021-11-09 10:48:24,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:24,369 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1455 transitions. [2021-11-09 10:48:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 10:48:24,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:24,370 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:24,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:24,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-11-09 10:48:24,571 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1141421244, now seen corresponding path program 46 times [2021-11-09 10:48:24,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:24,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113806359] [2021-11-09 10:48:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:24,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-09 10:48:24,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:24,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113806359] [2021-11-09 10:48:24,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113806359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:24,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224372130] [2021-11-09 10:48:24,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:48:24,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:24,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:24,923 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:24,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-09 10:48:26,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:48:26,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:26,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 10:48:26,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-09 10:48:26,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224372130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:26,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:26,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-09 10:48:26,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610958787] [2021-11-09 10:48:26,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:48:26,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:26,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:48:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:48:26,701 INFO L87 Difference]: Start difference. First operand 969 states and 1455 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:27,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:27,342 INFO L93 Difference]: Finished difference Result 1073 states and 1558 transitions. [2021-11-09 10:48:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 10:48:27,343 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 10:48:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:27,345 INFO L225 Difference]: With dead ends: 1073 [2021-11-09 10:48:27,345 INFO L226 Difference]: Without dead ends: 1050 [2021-11-09 10:48:27,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:48:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-11-09 10:48:27,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 969. [2021-11-09 10:48:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 1.5020661157024793) internal successors, (1454), 968 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1454 transitions. [2021-11-09 10:48:27,466 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1454 transitions. Word has length 44 [2021-11-09 10:48:27,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:27,467 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1454 transitions. [2021-11-09 10:48:27,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:27,467 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1454 transitions. [2021-11-09 10:48:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 10:48:27,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:27,469 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:27,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-11-09 10:48:27,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-09 10:48:27,694 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:27,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1353232718, now seen corresponding path program 47 times [2021-11-09 10:48:27,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:27,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539209470] [2021-11-09 10:48:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:27,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-09 10:48:28,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:28,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539209470] [2021-11-09 10:48:28,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539209470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:28,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003130029] [2021-11-09 10:48:28,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:48:28,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:28,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:28,145 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:28,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-09 10:48:32,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 10:48:32,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:32,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 10:48:32,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-09 10:48:32,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003130029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:32,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:32,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 28 [2021-11-09 10:48:32,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213676923] [2021-11-09 10:48:32,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 10:48:32,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:32,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 10:48:32,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:48:32,805 INFO L87 Difference]: Start difference. First operand 969 states and 1454 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:33,377 INFO L93 Difference]: Finished difference Result 1090 states and 1574 transitions. [2021-11-09 10:48:33,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 10:48:33,378 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 10:48:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:33,380 INFO L225 Difference]: With dead ends: 1090 [2021-11-09 10:48:33,380 INFO L226 Difference]: Without dead ends: 1067 [2021-11-09 10:48:33,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:48:33,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-11-09 10:48:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 969. [2021-11-09 10:48:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 1.5010330578512396) internal successors, (1453), 968 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1453 transitions. [2021-11-09 10:48:33,440 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1453 transitions. Word has length 44 [2021-11-09 10:48:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:33,440 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1453 transitions. [2021-11-09 10:48:33,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1453 transitions. [2021-11-09 10:48:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 10:48:33,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:33,449 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:33,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:33,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-09 10:48:33,649 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:33,650 INFO L85 PathProgramCache]: Analyzing trace with hash -995239300, now seen corresponding path program 48 times [2021-11-09 10:48:33,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:33,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322649618] [2021-11-09 10:48:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:33,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-09 10:48:34,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:34,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322649618] [2021-11-09 10:48:34,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322649618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:34,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474411008] [2021-11-09 10:48:34,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:48:34,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:34,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:34,068 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:34,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-09 10:48:36,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 10:48:36,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 10:48:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-09 10:48:36,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474411008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:36,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:36,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-09 10:48:36,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406433693] [2021-11-09 10:48:36,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:48:36,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:36,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:48:36,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:48:36,329 INFO L87 Difference]: Start difference. First operand 969 states and 1453 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:37,109 INFO L93 Difference]: Finished difference Result 1109 states and 1592 transitions. [2021-11-09 10:48:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:48:37,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 10:48:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:37,112 INFO L225 Difference]: With dead ends: 1109 [2021-11-09 10:48:37,112 INFO L226 Difference]: Without dead ends: 1086 [2021-11-09 10:48:37,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:48:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-09 10:48:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 969. [2021-11-09 10:48:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 1.5) internal successors, (1452), 968 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1452 transitions. [2021-11-09 10:48:37,207 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1452 transitions. Word has length 44 [2021-11-09 10:48:37,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:37,207 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1452 transitions. [2021-11-09 10:48:37,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1452 transitions. [2021-11-09 10:48:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 10:48:37,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:37,209 INFO L513 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:37,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:37,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-09 10:48:37,421 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:37,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:37,421 INFO L85 PathProgramCache]: Analyzing trace with hash -930345988, now seen corresponding path program 34 times [2021-11-09 10:48:37,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:37,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154268540] [2021-11-09 10:48:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:37,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:38,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:38,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154268540] [2021-11-09 10:48:38,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154268540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:38,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630835207] [2021-11-09 10:48:38,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:48:38,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:38,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:38,269 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:38,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-09 10:48:39,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:48:39,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:39,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-09 10:48:39,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:40,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630835207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:40,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:40,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-09 10:48:40,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113700101] [2021-11-09 10:48:40,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 10:48:40,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 10:48:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:48:40,256 INFO L87 Difference]: Start difference. First operand 969 states and 1452 transitions. Second operand has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:42,062 INFO L93 Difference]: Finished difference Result 1349 states and 2144 transitions. [2021-11-09 10:48:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 10:48:42,062 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 10:48:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:42,065 INFO L225 Difference]: With dead ends: 1349 [2021-11-09 10:48:42,065 INFO L226 Difference]: Without dead ends: 1300 [2021-11-09 10:48:42,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:48:42,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-11-09 10:48:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1002. [2021-11-09 10:48:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 1.5024975024975025) internal successors, (1504), 1001 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1504 transitions. [2021-11-09 10:48:42,208 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1504 transitions. Word has length 44 [2021-11-09 10:48:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:42,208 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1504 transitions. [2021-11-09 10:48:42,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1504 transitions. [2021-11-09 10:48:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:48:42,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:42,210 INFO L513 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:42,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-11-09 10:48:42,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-09 10:48:42,426 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:42,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2089324193, now seen corresponding path program 35 times [2021-11-09 10:48:42,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:42,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050505028] [2021-11-09 10:48:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:42,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:43,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:43,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050505028] [2021-11-09 10:48:43,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050505028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:43,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465130834] [2021-11-09 10:48:43,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:48:43,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:43,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:43,401 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:43,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-09 10:49:39,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-09 10:49:39,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:39,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-09 10:49:39,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:39,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465130834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:39,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:39,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-09 10:49:39,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914596720] [2021-11-09 10:49:39,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 10:49:39,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:39,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 10:49:39,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:49:39,474 INFO L87 Difference]: Start difference. First operand 1002 states and 1504 transitions. Second operand has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:41,222 INFO L93 Difference]: Finished difference Result 1390 states and 2212 transitions. [2021-11-09 10:49:41,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 10:49:41,222 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 10:49:41,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:41,224 INFO L225 Difference]: With dead ends: 1390 [2021-11-09 10:49:41,224 INFO L226 Difference]: Without dead ends: 1341 [2021-11-09 10:49:41,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:49:41,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-11-09 10:49:41,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1035. [2021-11-09 10:49:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 1.504835589941973) internal successors, (1556), 1034 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1556 transitions. [2021-11-09 10:49:41,278 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1556 transitions. Word has length 45 [2021-11-09 10:49:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:41,278 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 1556 transitions. [2021-11-09 10:49:41,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1556 transitions. [2021-11-09 10:49:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:49:41,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:41,280 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:41,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:41,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-09 10:49:41,486 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:41,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1312115860, now seen corresponding path program 49 times [2021-11-09 10:49:41,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:41,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032321717] [2021-11-09 10:49:41,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:41,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:42,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:42,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032321717] [2021-11-09 10:49:42,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032321717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:42,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39943484] [2021-11-09 10:49:42,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:49:42,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:42,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:42,825 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:42,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-09 10:49:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:45,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 140 conjunts are in the unsatisfiable core [2021-11-09 10:49:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:51,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39943484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:51,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:51,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 42] total 73 [2021-11-09 10:49:51,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934882526] [2021-11-09 10:49:51,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-09 10:49:51,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:51,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-09 10:49:51,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=5069, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 10:49:51,703 INFO L87 Difference]: Start difference. First operand 1035 states and 1556 transitions. Second operand has 73 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:55,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:55,420 INFO L93 Difference]: Finished difference Result 1059 states and 1579 transitions. [2021-11-09 10:49:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 10:49:55,421 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 10:49:55,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:55,425 INFO L225 Difference]: With dead ends: 1059 [2021-11-09 10:49:55,425 INFO L226 Difference]: Without dead ends: 1024 [2021-11-09 10:49:55,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=251, Invalid=6721, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 10:49:55,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-11-09 10:49:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1024. [2021-11-09 10:49:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.509286412512219) internal successors, (1544), 1023 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1544 transitions. [2021-11-09 10:49:55,525 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1544 transitions. Word has length 46 [2021-11-09 10:49:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:55,525 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1544 transitions. [2021-11-09 10:49:55,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1544 transitions. [2021-11-09 10:49:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:49:55,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:55,527 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:55,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:55,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-11-09 10:49:55,739 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:55,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1262238940, now seen corresponding path program 50 times [2021-11-09 10:49:55,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:55,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117104640] [2021-11-09 10:49:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:55,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-09 10:49:56,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:56,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117104640] [2021-11-09 10:49:56,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117104640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:56,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443808841] [2021-11-09 10:49:56,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:49:56,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:56,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:56,181 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:56,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-09 10:49:57,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:49:57,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 10:49:57,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-09 10:49:58,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443808841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:58,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:58,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2021-11-09 10:49:58,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844994400] [2021-11-09 10:49:58,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:49:58,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:58,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:49:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:49:58,226 INFO L87 Difference]: Start difference. First operand 1024 states and 1544 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:58,619 INFO L93 Difference]: Finished difference Result 1118 states and 1637 transitions. [2021-11-09 10:49:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 10:49:58,619 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 10:49:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:58,622 INFO L225 Difference]: With dead ends: 1118 [2021-11-09 10:49:58,622 INFO L226 Difference]: Without dead ends: 1094 [2021-11-09 10:49:58,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:49:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-11-09 10:49:58,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1024. [2021-11-09 10:49:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.5083088954056696) internal successors, (1543), 1023 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1543 transitions. [2021-11-09 10:49:58,717 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1543 transitions. Word has length 46 [2021-11-09 10:49:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:58,717 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1543 transitions. [2021-11-09 10:49:58,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1543 transitions. [2021-11-09 10:49:58,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:49:58,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:58,719 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:58,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:58,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:58,935 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2118400660, now seen corresponding path program 51 times [2021-11-09 10:49:58,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:58,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481222438] [2021-11-09 10:49:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:58,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-09 10:49:59,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:59,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481222438] [2021-11-09 10:49:59,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481222438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:59,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113432670] [2021-11-09 10:49:59,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:49:59,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:59,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:59,279 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:59,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-09 10:50:02,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 10:50:02,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:02,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 10:50:02,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-09 10:50:02,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113432670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:02,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:02,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-09 10:50:02,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026058439] [2021-11-09 10:50:02,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 10:50:02,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 10:50:02,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:50:02,267 INFO L87 Difference]: Start difference. First operand 1024 states and 1543 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:02,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:02,951 INFO L93 Difference]: Finished difference Result 1134 states and 1652 transitions. [2021-11-09 10:50:02,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 10:50:02,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 10:50:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:02,953 INFO L225 Difference]: With dead ends: 1134 [2021-11-09 10:50:02,953 INFO L226 Difference]: Without dead ends: 1110 [2021-11-09 10:50:02,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:50:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-11-09 10:50:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1024. [2021-11-09 10:50:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.5073313782991202) internal successors, (1542), 1023 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1542 transitions. [2021-11-09 10:50:03,012 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1542 transitions. Word has length 46 [2021-11-09 10:50:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:03,012 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1542 transitions. [2021-11-09 10:50:03,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1542 transitions. [2021-11-09 10:50:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:50:03,013 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:03,014 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:03,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-11-09 10:50:03,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-09 10:50:03,214 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:03,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:03,215 INFO L85 PathProgramCache]: Analyzing trace with hash 266398428, now seen corresponding path program 52 times [2021-11-09 10:50:03,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:03,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74436002] [2021-11-09 10:50:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:03,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-09 10:50:03,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:03,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74436002] [2021-11-09 10:50:03,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74436002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:03,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107547212] [2021-11-09 10:50:03,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:50:03,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:03,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:03,561 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:03,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-09 10:50:05,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:50:05,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 10:50:05,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-09 10:50:05,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107547212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:05,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:05,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-09 10:50:05,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244411257] [2021-11-09 10:50:05,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 10:50:05,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:05,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 10:50:05,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:50:05,476 INFO L87 Difference]: Start difference. First operand 1024 states and 1542 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:06,184 INFO L93 Difference]: Finished difference Result 1152 states and 1669 transitions. [2021-11-09 10:50:06,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:50:06,184 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 10:50:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:06,185 INFO L225 Difference]: With dead ends: 1152 [2021-11-09 10:50:06,186 INFO L226 Difference]: Without dead ends: 1128 [2021-11-09 10:50:06,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:50:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-11-09 10:50:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1024. [2021-11-09 10:50:06,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.5063538611925709) internal successors, (1541), 1023 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1541 transitions. [2021-11-09 10:50:06,243 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1541 transitions. Word has length 46 [2021-11-09 10:50:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:06,244 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1541 transitions. [2021-11-09 10:50:06,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:06,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1541 transitions. [2021-11-09 10:50:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:50:06,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:06,245 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:06,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-11-09 10:50:06,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:06,445 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:06,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:06,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1590253420, now seen corresponding path program 53 times [2021-11-09 10:50:06,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:06,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595531437] [2021-11-09 10:50:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:06,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-09 10:50:06,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:06,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595531437] [2021-11-09 10:50:06,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595531437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:06,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695353460] [2021-11-09 10:50:06,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:50:06,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:06,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:06,821 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:06,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-09 10:50:11,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-09 10:50:11,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:11,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 10:50:11,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-09 10:50:11,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695353460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:11,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:11,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-09 10:50:11,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408296959] [2021-11-09 10:50:11,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 10:50:11,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:11,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 10:50:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:50:11,932 INFO L87 Difference]: Start difference. First operand 1024 states and 1541 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:12,760 INFO L93 Difference]: Finished difference Result 1172 states and 1688 transitions. [2021-11-09 10:50:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 10:50:12,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 10:50:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:12,762 INFO L225 Difference]: With dead ends: 1172 [2021-11-09 10:50:12,762 INFO L226 Difference]: Without dead ends: 1148 [2021-11-09 10:50:12,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:50:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-11-09 10:50:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1024. [2021-11-09 10:50:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.5053763440860215) internal successors, (1540), 1023 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1540 transitions. [2021-11-09 10:50:12,828 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1540 transitions. Word has length 46 [2021-11-09 10:50:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:12,829 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1540 transitions. [2021-11-09 10:50:12,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1540 transitions. [2021-11-09 10:50:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:50:12,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:12,830 INFO L513 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:12,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-11-09 10:50:13,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:13,030 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:13,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:13,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1209819292, now seen corresponding path program 36 times [2021-11-09 10:50:13,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:13,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771279712] [2021-11-09 10:50:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:13,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:13,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:13,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771279712] [2021-11-09 10:50:13,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771279712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:13,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121990670] [2021-11-09 10:50:13,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:50:13,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:13,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:13,919 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:13,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-09 10:50:23,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-09 10:50:23,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:23,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-09 10:50:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:23,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121990670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:23,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:23,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-09 10:50:23,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604189641] [2021-11-09 10:50:23,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 10:50:23,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:23,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 10:50:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:50:23,433 INFO L87 Difference]: Start difference. First operand 1024 states and 1540 transitions. Second operand has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:25,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:25,220 INFO L93 Difference]: Finished difference Result 1420 states and 2264 transitions. [2021-11-09 10:50:25,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 10:50:25,221 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 10:50:25,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:25,222 INFO L225 Difference]: With dead ends: 1420 [2021-11-09 10:50:25,222 INFO L226 Difference]: Without dead ends: 1371 [2021-11-09 10:50:25,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=1637, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:50:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-11-09 10:50:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1057. [2021-11-09 10:50:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 1.5075757575757576) internal successors, (1592), 1056 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1592 transitions. [2021-11-09 10:50:25,285 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1592 transitions. Word has length 46 [2021-11-09 10:50:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:25,285 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1592 transitions. [2021-11-09 10:50:25,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1592 transitions. [2021-11-09 10:50:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 10:50:25,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:25,286 INFO L513 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:25,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:25,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-11-09 10:50:25,487 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:25,487 INFO L85 PathProgramCache]: Analyzing trace with hash -285028863, now seen corresponding path program 37 times [2021-11-09 10:50:25,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:25,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424162121] [2021-11-09 10:50:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:25,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:26,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:26,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424162121] [2021-11-09 10:50:26,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424162121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:26,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387666849] [2021-11-09 10:50:26,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:50:26,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:26,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:26,390 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:26,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-09 10:50:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:28,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-09 10:50:28,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:28,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387666849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:28,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:28,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-09 10:50:28,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665294825] [2021-11-09 10:50:28,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 10:50:28,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 10:50:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:50:28,370 INFO L87 Difference]: Start difference. First operand 1057 states and 1592 transitions. Second operand has 42 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:30,229 INFO L93 Difference]: Finished difference Result 1461 states and 2332 transitions. [2021-11-09 10:50:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 10:50:30,229 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 10:50:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:30,230 INFO L225 Difference]: With dead ends: 1461 [2021-11-09 10:50:30,231 INFO L226 Difference]: Without dead ends: 1412 [2021-11-09 10:50:30,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=1719, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 10:50:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2021-11-09 10:50:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1090. [2021-11-09 10:50:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 1.5096418732782368) internal successors, (1644), 1089 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1644 transitions. [2021-11-09 10:50:30,323 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1644 transitions. Word has length 47 [2021-11-09 10:50:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:30,324 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1644 transitions. [2021-11-09 10:50:30,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1644 transitions. [2021-11-09 10:50:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 10:50:30,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:30,325 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:30,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-11-09 10:50:30,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:30,554 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:30,554 INFO L85 PathProgramCache]: Analyzing trace with hash -117441988, now seen corresponding path program 54 times [2021-11-09 10:50:30,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:30,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995871951] [2021-11-09 10:50:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:30,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 10:50:30,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:30,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995871951] [2021-11-09 10:50:30,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995871951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:30,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310084738] [2021-11-09 10:50:30,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:50:30,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:30,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:30,944 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:30,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-09 10:50:33,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 10:50:33,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:33,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 10:50:33,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 10:50:33,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310084738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:33,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:33,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2021-11-09 10:50:33,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512633663] [2021-11-09 10:50:33,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 10:50:33,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 10:50:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:50:33,832 INFO L87 Difference]: Start difference. First operand 1090 states and 1644 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:34,320 INFO L93 Difference]: Finished difference Result 1174 states and 1727 transitions. [2021-11-09 10:50:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:50:34,320 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 10:50:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:34,321 INFO L225 Difference]: With dead ends: 1174 [2021-11-09 10:50:34,321 INFO L226 Difference]: Without dead ends: 1149 [2021-11-09 10:50:34,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:50:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-09 10:50:34,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1090. [2021-11-09 10:50:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 1.5087235996326906) internal successors, (1643), 1089 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1643 transitions. [2021-11-09 10:50:34,421 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1643 transitions. Word has length 48 [2021-11-09 10:50:34,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:34,422 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1643 transitions. [2021-11-09 10:50:34,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:34,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1643 transitions. [2021-11-09 10:50:34,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 10:50:34,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:34,423 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:34,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:34,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-11-09 10:50:34,623 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:34,624 INFO L85 PathProgramCache]: Analyzing trace with hash -111131122, now seen corresponding path program 55 times [2021-11-09 10:50:34,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:34,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901116703] [2021-11-09 10:50:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:34,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-09 10:50:34,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:34,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901116703] [2021-11-09 10:50:34,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901116703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:34,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116353349] [2021-11-09 10:50:34,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:50:34,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:34,988 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:34,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-09 10:50:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:36,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 10:50:36,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-09 10:50:37,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116353349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:37,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:37,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 10:50:37,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948189980] [2021-11-09 10:50:37,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:50:37,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:37,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:50:37,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:50:37,064 INFO L87 Difference]: Start difference. First operand 1090 states and 1643 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:37,714 INFO L93 Difference]: Finished difference Result 1189 states and 1741 transitions. [2021-11-09 10:50:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 10:50:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 10:50:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:37,715 INFO L225 Difference]: With dead ends: 1189 [2021-11-09 10:50:37,715 INFO L226 Difference]: Without dead ends: 1164 [2021-11-09 10:50:37,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:50:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-11-09 10:50:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1090. [2021-11-09 10:50:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 1.5078053259871442) internal successors, (1642), 1089 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1642 transitions. [2021-11-09 10:50:37,773 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1642 transitions. Word has length 48 [2021-11-09 10:50:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:37,774 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1642 transitions. [2021-11-09 10:50:37,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1642 transitions. [2021-11-09 10:50:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 10:50:37,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:37,775 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:37,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-11-09 10:50:37,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-11-09 10:50:37,975 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:37,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1690187772, now seen corresponding path program 56 times [2021-11-09 10:50:37,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:37,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581502465] [2021-11-09 10:50:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:37,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-09 10:50:38,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:38,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581502465] [2021-11-09 10:50:38,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581502465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:38,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808897263] [2021-11-09 10:50:38,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:50:38,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:38,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:38,355 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:38,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-11-09 10:50:40,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:50:40,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:40,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 10:50:40,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-09 10:50:40,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808897263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:40,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:40,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 10:50:40,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586651007] [2021-11-09 10:50:40,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:50:40,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:50:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:50:40,384 INFO L87 Difference]: Start difference. First operand 1090 states and 1642 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:41,255 INFO L93 Difference]: Finished difference Result 1206 states and 1757 transitions. [2021-11-09 10:50:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 10:50:41,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 10:50:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:41,257 INFO L225 Difference]: With dead ends: 1206 [2021-11-09 10:50:41,257 INFO L226 Difference]: Without dead ends: 1181 [2021-11-09 10:50:41,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:50:41,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-11-09 10:50:41,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1090. [2021-11-09 10:50:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 1.5068870523415978) internal successors, (1641), 1089 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1641 transitions. [2021-11-09 10:50:41,379 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1641 transitions. Word has length 48 [2021-11-09 10:50:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:41,379 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1641 transitions. [2021-11-09 10:50:41,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1641 transitions. [2021-11-09 10:50:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 10:50:41,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:41,382 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:41,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:41,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-09 10:50:41,598 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:41,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1576841138, now seen corresponding path program 57 times [2021-11-09 10:50:41,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:41,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757816835] [2021-11-09 10:50:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:41,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-09 10:50:41,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:41,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757816835] [2021-11-09 10:50:41,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757816835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:41,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132197686] [2021-11-09 10:50:41,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:50:41,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:41,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:41,975 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:41,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-09 10:50:45,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 10:50:45,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:45,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 10:50:45,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-09 10:50:45,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132197686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:45,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:45,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 10:50:45,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854898813] [2021-11-09 10:50:45,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:50:45,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:50:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:50:45,196 INFO L87 Difference]: Start difference. First operand 1090 states and 1641 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:46,082 INFO L93 Difference]: Finished difference Result 1225 states and 1775 transitions. [2021-11-09 10:50:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 10:50:46,082 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 10:50:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:46,084 INFO L225 Difference]: With dead ends: 1225 [2021-11-09 10:50:46,084 INFO L226 Difference]: Without dead ends: 1200 [2021-11-09 10:50:46,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=1908, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:50:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-11-09 10:50:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1090. [2021-11-09 10:50:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 1.5059687786960514) internal successors, (1640), 1089 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:46,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1640 transitions. [2021-11-09 10:50:46,146 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1640 transitions. Word has length 48 [2021-11-09 10:50:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:46,147 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1640 transitions. [2021-11-09 10:50:46,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:46,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1640 transitions. [2021-11-09 10:50:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 10:50:46,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:46,148 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:46,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:46,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:46,348 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:46,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1920001468, now seen corresponding path program 58 times [2021-11-09 10:50:46,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:46,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305350457] [2021-11-09 10:50:46,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:46,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-09 10:50:46,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:46,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305350457] [2021-11-09 10:50:46,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305350457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:46,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147409806] [2021-11-09 10:50:46,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:50:46,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:46,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:46,688 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:46,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-09 10:50:48,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:50:48,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:48,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 10:50:48,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-09 10:50:48,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147409806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:48,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:48,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 10:50:48,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377124106] [2021-11-09 10:50:48,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:50:48,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:50:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:50:48,741 INFO L87 Difference]: Start difference. First operand 1090 states and 1640 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:49,582 INFO L93 Difference]: Finished difference Result 1246 states and 1795 transitions. [2021-11-09 10:50:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 10:50:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 10:50:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:49,584 INFO L225 Difference]: With dead ends: 1246 [2021-11-09 10:50:49,584 INFO L226 Difference]: Without dead ends: 1221 [2021-11-09 10:50:49,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=1741, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:50:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-11-09 10:50:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1090. [2021-11-09 10:50:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 1.505050505050505) internal successors, (1639), 1089 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1639 transitions. [2021-11-09 10:50:49,674 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1639 transitions. Word has length 48 [2021-11-09 10:50:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:49,674 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1639 transitions. [2021-11-09 10:50:49,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1639 transitions. [2021-11-09 10:50:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 10:50:49,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:49,675 INFO L513 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:49,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-11-09 10:50:49,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-11-09 10:50:49,876 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:49,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash 619318588, now seen corresponding path program 38 times [2021-11-09 10:50:49,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:49,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676970076] [2021-11-09 10:50:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:49,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:50,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:50,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676970076] [2021-11-09 10:50:50,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676970076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:50,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954247852] [2021-11-09 10:50:50,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:50:50,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:50,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:50,825 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:50,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-11-09 10:50:52,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:50:52,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:52,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-09 10:50:52,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:52,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954247852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:52,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:52,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-09 10:50:52,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920597006] [2021-11-09 10:50:52,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 10:50:52,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:52,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 10:50:52,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 10:50:52,984 INFO L87 Difference]: Start difference. First operand 1090 states and 1639 transitions. Second operand has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:54,872 INFO L93 Difference]: Finished difference Result 1502 states and 2395 transitions. [2021-11-09 10:50:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 10:50:54,872 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 10:50:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:54,874 INFO L225 Difference]: With dead ends: 1502 [2021-11-09 10:50:54,874 INFO L226 Difference]: Without dead ends: 1453 [2021-11-09 10:50:54,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:50:54,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-11-09 10:50:54,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1123. [2021-11-09 10:50:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.5071301247771836) internal successors, (1691), 1122 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1691 transitions. [2021-11-09 10:50:54,968 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1691 transitions. Word has length 48 [2021-11-09 10:50:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:54,968 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1691 transitions. [2021-11-09 10:50:54,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1691 transitions. [2021-11-09 10:50:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 10:50:54,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:54,970 INFO L513 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:55,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:55,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-11-09 10:50:55,190 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:55,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1410681503, now seen corresponding path program 39 times [2021-11-09 10:50:55,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:55,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298496710] [2021-11-09 10:50:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:55,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:56,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:56,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298496710] [2021-11-09 10:50:56,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298496710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:56,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005328154] [2021-11-09 10:50:56,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:50:56,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:56,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:56,149 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:56,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-09 10:51:01,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-09 10:51:01,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-09 10:51:01,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:01,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005328154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:01,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:01,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-11-09 10:51:01,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719189049] [2021-11-09 10:51:01,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 10:51:01,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:01,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 10:51:01,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:51:01,664 INFO L87 Difference]: Start difference. First operand 1123 states and 1691 transitions. Second operand has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:03,743 INFO L93 Difference]: Finished difference Result 1543 states and 2463 transitions. [2021-11-09 10:51:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 10:51:03,743 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 10:51:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:03,744 INFO L225 Difference]: With dead ends: 1543 [2021-11-09 10:51:03,745 INFO L226 Difference]: Without dead ends: 1494 [2021-11-09 10:51:03,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:51:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-11-09 10:51:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1156. [2021-11-09 10:51:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 1.509090909090909) internal successors, (1743), 1155 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1743 transitions. [2021-11-09 10:51:03,807 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1743 transitions. Word has length 49 [2021-11-09 10:51:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:03,807 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1743 transitions. [2021-11-09 10:51:03,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1743 transitions. [2021-11-09 10:51:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:51:03,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:03,808 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:03,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-11-09 10:51:04,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-11-09 10:51:04,009 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1236257372, now seen corresponding path program 59 times [2021-11-09 10:51:04,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:04,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005378052] [2021-11-09 10:51:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:04,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:05,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:05,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005378052] [2021-11-09 10:51:05,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005378052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:05,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517130733] [2021-11-09 10:51:05,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:51:05,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:05,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:05,202 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:05,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-11-09 10:51:13,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 10:51:13,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:13,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 152 conjunts are in the unsatisfiable core [2021-11-09 10:51:13,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:17,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517130733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:17,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:17,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 46] total 80 [2021-11-09 10:51:17,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476188582] [2021-11-09 10:51:17,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-09 10:51:17,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:17,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-09 10:51:17,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=6150, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 10:51:17,486 INFO L87 Difference]: Start difference. First operand 1156 states and 1743 transitions. Second operand has 80 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:24,471 INFO L93 Difference]: Finished difference Result 1217 states and 1804 transitions. [2021-11-09 10:51:24,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 10:51:24,472 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 10:51:24,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:24,473 INFO L225 Difference]: With dead ends: 1217 [2021-11-09 10:51:24,473 INFO L226 Difference]: Without dead ends: 1132 [2021-11-09 10:51:24,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=333, Invalid=12549, Unknown=0, NotChecked=0, Total=12882 [2021-11-09 10:51:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-11-09 10:51:24,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1132. [2021-11-09 10:51:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.5075154730327145) internal successors, (1705), 1131 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1705 transitions. [2021-11-09 10:51:24,528 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1705 transitions. Word has length 50 [2021-11-09 10:51:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:24,528 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1705 transitions. [2021-11-09 10:51:24,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1705 transitions. [2021-11-09 10:51:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:51:24,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:24,529 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:24,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:24,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-11-09 10:51:24,729 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:24,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1147098452, now seen corresponding path program 60 times [2021-11-09 10:51:24,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:24,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178036] [2021-11-09 10:51:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:24,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-09 10:51:25,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:25,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178036] [2021-11-09 10:51:25,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:25,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089813887] [2021-11-09 10:51:25,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:51:25,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:25,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:25,059 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:25,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-11-09 10:51:27,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 10:51:27,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:27,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 10:51:27,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-09 10:51:27,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089813887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:27,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:27,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 34 [2021-11-09 10:51:27,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119381698] [2021-11-09 10:51:27,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 10:51:27,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:27,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 10:51:27,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:51:27,682 INFO L87 Difference]: Start difference. First operand 1132 states and 1705 transitions. Second operand has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:28,039 INFO L93 Difference]: Finished difference Result 1220 states and 1792 transitions. [2021-11-09 10:51:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:51:28,040 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 10:51:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:28,041 INFO L225 Difference]: With dead ends: 1220 [2021-11-09 10:51:28,041 INFO L226 Difference]: Without dead ends: 1194 [2021-11-09 10:51:28,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:51:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-09 10:51:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1132. [2021-11-09 10:51:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.506631299734748) internal successors, (1704), 1131 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1704 transitions. [2021-11-09 10:51:28,095 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1704 transitions. Word has length 50 [2021-11-09 10:51:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:28,095 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1704 transitions. [2021-11-09 10:51:28,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1704 transitions. [2021-11-09 10:51:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:51:28,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:28,097 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:28,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-11-09 10:51:28,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:28,302 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:28,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:28,302 INFO L85 PathProgramCache]: Analyzing trace with hash 854229084, now seen corresponding path program 61 times [2021-11-09 10:51:28,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:28,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136469160] [2021-11-09 10:51:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:28,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-09 10:51:28,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:28,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136469160] [2021-11-09 10:51:28,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136469160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:28,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798396948] [2021-11-09 10:51:28,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:51:28,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:28,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:28,650 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:28,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-09 10:51:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:30,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 10:51:30,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-09 10:51:30,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798396948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:30,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:30,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-09 10:51:30,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377510849] [2021-11-09 10:51:30,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:51:30,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:51:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:51:30,709 INFO L87 Difference]: Start difference. First operand 1132 states and 1704 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:31,403 INFO L93 Difference]: Finished difference Result 1236 states and 1807 transitions. [2021-11-09 10:51:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 10:51:31,403 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 10:51:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:31,404 INFO L225 Difference]: With dead ends: 1236 [2021-11-09 10:51:31,405 INFO L226 Difference]: Without dead ends: 1210 [2021-11-09 10:51:31,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=1581, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:51:31,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-11-09 10:51:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1132. [2021-11-09 10:51:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.5057471264367817) internal successors, (1703), 1131 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1703 transitions. [2021-11-09 10:51:31,459 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1703 transitions. Word has length 50 [2021-11-09 10:51:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:31,460 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1703 transitions. [2021-11-09 10:51:31,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1703 transitions. [2021-11-09 10:51:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:51:31,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:31,461 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:31,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:31,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:31,662 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash 87504044, now seen corresponding path program 62 times [2021-11-09 10:51:31,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:31,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101493465] [2021-11-09 10:51:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:31,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-09 10:51:31,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:31,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101493465] [2021-11-09 10:51:31,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101493465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:31,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314695668] [2021-11-09 10:51:31,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:51:31,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:31,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:31,992 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:31,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-11-09 10:51:33,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:51:33,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:33,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 10:51:33,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-09 10:51:34,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314695668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:34,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:34,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-09 10:51:34,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80750508] [2021-11-09 10:51:34,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:51:34,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:34,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:51:34,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:51:34,059 INFO L87 Difference]: Start difference. First operand 1132 states and 1703 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:34,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:34,826 INFO L93 Difference]: Finished difference Result 1254 states and 1824 transitions. [2021-11-09 10:51:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 10:51:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 10:51:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:34,828 INFO L225 Difference]: With dead ends: 1254 [2021-11-09 10:51:34,828 INFO L226 Difference]: Without dead ends: 1228 [2021-11-09 10:51:34,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=1910, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:51:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-11-09 10:51:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1132. [2021-11-09 10:51:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.5048629531388151) internal successors, (1702), 1131 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1702 transitions. [2021-11-09 10:51:34,882 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1702 transitions. Word has length 50 [2021-11-09 10:51:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:34,882 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1702 transitions. [2021-11-09 10:51:34,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1702 transitions. [2021-11-09 10:51:34,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:51:34,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:34,884 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:34,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-11-09 10:51:35,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-11-09 10:51:35,084 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:35,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:35,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2002433628, now seen corresponding path program 63 times [2021-11-09 10:51:35,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:35,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926787755] [2021-11-09 10:51:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:35,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-09 10:51:35,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:35,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926787755] [2021-11-09 10:51:35,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926787755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:35,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818886182] [2021-11-09 10:51:35,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:51:35,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:35,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:35,413 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:35,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-11-09 10:51:39,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 10:51:39,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:39,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 10:51:39,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-09 10:51:39,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818886182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:39,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:39,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-09 10:51:39,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966988290] [2021-11-09 10:51:39,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:51:39,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:39,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:51:39,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:51:39,766 INFO L87 Difference]: Start difference. First operand 1132 states and 1702 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:40,518 INFO L93 Difference]: Finished difference Result 1274 states and 1843 transitions. [2021-11-09 10:51:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 10:51:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 10:51:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:40,520 INFO L225 Difference]: With dead ends: 1274 [2021-11-09 10:51:40,520 INFO L226 Difference]: Without dead ends: 1248 [2021-11-09 10:51:40,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1998, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 10:51:40,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-11-09 10:51:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1132. [2021-11-09 10:51:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.5039787798408488) internal successors, (1701), 1131 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1701 transitions. [2021-11-09 10:51:40,574 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1701 transitions. Word has length 50 [2021-11-09 10:51:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:40,574 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1701 transitions. [2021-11-09 10:51:40,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1701 transitions. [2021-11-09 10:51:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:51:40,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:40,575 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:40,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-11-09 10:51:40,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-11-09 10:51:40,776 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:40,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:40,776 INFO L85 PathProgramCache]: Analyzing trace with hash -152551764, now seen corresponding path program 64 times [2021-11-09 10:51:40,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:40,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250401290] [2021-11-09 10:51:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:40,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-09 10:51:41,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:41,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250401290] [2021-11-09 10:51:41,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250401290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:41,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942162674] [2021-11-09 10:51:41,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:51:41,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:41,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:41,108 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:41,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-11-09 10:51:43,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:51:43,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:43,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 10:51:43,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-09 10:51:43,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942162674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:43,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:43,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 30 [2021-11-09 10:51:43,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546120610] [2021-11-09 10:51:43,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 10:51:43,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:43,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 10:51:43,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:51:43,349 INFO L87 Difference]: Start difference. First operand 1132 states and 1701 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:44,122 INFO L93 Difference]: Finished difference Result 1296 states and 1864 transitions. [2021-11-09 10:51:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 10:51:44,123 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 10:51:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:44,124 INFO L225 Difference]: With dead ends: 1296 [2021-11-09 10:51:44,124 INFO L226 Difference]: Without dead ends: 1270 [2021-11-09 10:51:44,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:51:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-11-09 10:51:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1132. [2021-11-09 10:51:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.5030946065428823) internal successors, (1700), 1131 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1700 transitions. [2021-11-09 10:51:44,177 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1700 transitions. Word has length 50 [2021-11-09 10:51:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:44,178 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1700 transitions. [2021-11-09 10:51:44,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:44,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1700 transitions. [2021-11-09 10:51:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:51:44,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:44,179 INFO L513 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:44,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-11-09 10:51:44,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-11-09 10:51:44,379 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:44,380 INFO L85 PathProgramCache]: Analyzing trace with hash 83825116, now seen corresponding path program 40 times [2021-11-09 10:51:44,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:44,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77917189] [2021-11-09 10:51:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:44,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:45,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:45,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77917189] [2021-11-09 10:51:45,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77917189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:45,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056066517] [2021-11-09 10:51:45,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:51:45,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:45,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:45,504 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:45,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-11-09 10:51:47,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:51:47,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:47,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-09 10:51:47,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:47,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056066517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:47,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:47,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-09 10:51:47,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217918591] [2021-11-09 10:51:47,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 10:51:47,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:47,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 10:51:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:51:47,757 INFO L87 Difference]: Start difference. First operand 1132 states and 1700 transitions. Second operand has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:49,681 INFO L93 Difference]: Finished difference Result 1560 states and 2488 transitions. [2021-11-09 10:51:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 10:51:49,682 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 10:51:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:49,683 INFO L225 Difference]: With dead ends: 1560 [2021-11-09 10:51:49,683 INFO L226 Difference]: Without dead ends: 1511 [2021-11-09 10:51:49,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:51:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-11-09 10:51:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1165. [2021-11-09 10:51:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 1.5051546391752577) internal successors, (1752), 1164 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1752 transitions. [2021-11-09 10:51:49,739 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1752 transitions. Word has length 50 [2021-11-09 10:51:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:49,739 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 1752 transitions. [2021-11-09 10:51:49,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1752 transitions. [2021-11-09 10:51:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 10:51:49,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:49,740 INFO L513 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:49,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-11-09 10:51:49,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-11-09 10:51:49,941 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:49,941 INFO L85 PathProgramCache]: Analyzing trace with hash -831109951, now seen corresponding path program 41 times [2021-11-09 10:51:49,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:49,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310575771] [2021-11-09 10:51:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:49,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:50,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:50,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310575771] [2021-11-09 10:51:50,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310575771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:50,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934903576] [2021-11-09 10:51:50,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:51:50,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:50,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:50,882 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:50,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-11-09 10:52:46,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-09 10:52:46,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:46,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-09 10:52:46,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:46,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934903576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:46,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:46,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-09 10:52:46,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34874601] [2021-11-09 10:52:46,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 10:52:46,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:46,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 10:52:46,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:52:46,376 INFO L87 Difference]: Start difference. First operand 1165 states and 1752 transitions. Second operand has 46 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:48,372 INFO L93 Difference]: Finished difference Result 1601 states and 2556 transitions. [2021-11-09 10:52:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 10:52:48,373 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 10:52:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:48,374 INFO L225 Difference]: With dead ends: 1601 [2021-11-09 10:52:48,374 INFO L226 Difference]: Without dead ends: 1552 [2021-11-09 10:52:48,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=2067, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 10:52:48,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-11-09 10:52:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1198. [2021-11-09 10:52:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.5071010860484544) internal successors, (1804), 1197 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1804 transitions. [2021-11-09 10:52:48,436 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1804 transitions. Word has length 51 [2021-11-09 10:52:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:48,436 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 1804 transitions. [2021-11-09 10:52:48,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1804 transitions. [2021-11-09 10:52:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:52:48,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:48,437 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:48,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-11-09 10:52:48,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-11-09 10:52:48,639 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:48,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2066650418, now seen corresponding path program 65 times [2021-11-09 10:52:48,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:48,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480599220] [2021-11-09 10:52:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:48,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-09 10:52:48,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:48,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480599220] [2021-11-09 10:52:48,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480599220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:48,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216665319] [2021-11-09 10:52:48,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:52:48,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:48,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:48,998 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:49,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-11-09 10:52:59,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 10:52:59,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 10:52:59,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-09 10:53:00,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216665319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:00,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:00,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2021-11-09 10:53:00,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120681600] [2021-11-09 10:53:00,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 10:53:00,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:00,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 10:53:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:53:00,002 INFO L87 Difference]: Start difference. First operand 1198 states and 1804 transitions. Second operand has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:00,450 INFO L93 Difference]: Finished difference Result 1264 states and 1869 transitions. [2021-11-09 10:53:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 10:53:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 10:53:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:00,452 INFO L225 Difference]: With dead ends: 1264 [2021-11-09 10:53:00,452 INFO L226 Difference]: Without dead ends: 1237 [2021-11-09 10:53:00,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:53:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-11-09 10:53:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1198. [2021-11-09 10:53:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.506265664160401) internal successors, (1803), 1197 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1803 transitions. [2021-11-09 10:53:00,514 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1803 transitions. Word has length 52 [2021-11-09 10:53:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:00,514 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 1803 transitions. [2021-11-09 10:53:00,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1803 transitions. [2021-11-09 10:53:00,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:53:00,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:00,516 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:00,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-11-09 10:53:00,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:00,731 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:00,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1500566908, now seen corresponding path program 66 times [2021-11-09 10:53:00,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:00,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981208004] [2021-11-09 10:53:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:00,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-09 10:53:01,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:01,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981208004] [2021-11-09 10:53:01,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981208004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:01,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108273636] [2021-11-09 10:53:01,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:53:01,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:01,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:01,145 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:01,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-11-09 10:53:03,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 10:53:03,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:53:03,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 10:53:03,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-09 10:53:04,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108273636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:04,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:04,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-09 10:53:04,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239483354] [2021-11-09 10:53:04,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:53:04,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:04,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:53:04,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:53:04,036 INFO L87 Difference]: Start difference. First operand 1198 states and 1803 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:04,820 INFO L93 Difference]: Finished difference Result 1290 states and 1894 transitions. [2021-11-09 10:53:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 10:53:04,821 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 10:53:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:04,822 INFO L225 Difference]: With dead ends: 1290 [2021-11-09 10:53:04,822 INFO L226 Difference]: Without dead ends: 1263 [2021-11-09 10:53:04,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=1826, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:53:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-11-09 10:53:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1198. [2021-11-09 10:53:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.5054302422723476) internal successors, (1802), 1197 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1802 transitions. [2021-11-09 10:53:04,881 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1802 transitions. Word has length 52 [2021-11-09 10:53:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:04,881 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 1802 transitions. [2021-11-09 10:53:04,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1802 transitions. [2021-11-09 10:53:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:53:04,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:04,883 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:04,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-11-09 10:53:05,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:05,083 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:05,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:05,084 INFO L85 PathProgramCache]: Analyzing trace with hash 922901774, now seen corresponding path program 67 times [2021-11-09 10:53:05,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:05,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45894084] [2021-11-09 10:53:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:05,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-09 10:53:05,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:05,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45894084] [2021-11-09 10:53:05,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45894084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:05,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736083700] [2021-11-09 10:53:05,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:53:05,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:05,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:05,447 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:05,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-11-09 10:53:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:07,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 10:53:07,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-09 10:53:07,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736083700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:07,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:07,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-09 10:53:07,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496163788] [2021-11-09 10:53:07,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:53:07,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:07,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:53:07,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:53:07,722 INFO L87 Difference]: Start difference. First operand 1198 states and 1802 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:08,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:08,594 INFO L93 Difference]: Finished difference Result 1307 states and 1910 transitions. [2021-11-09 10:53:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 10:53:08,595 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 10:53:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:08,596 INFO L225 Difference]: With dead ends: 1307 [2021-11-09 10:53:08,596 INFO L226 Difference]: Without dead ends: 1280 [2021-11-09 10:53:08,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 10:53:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-11-09 10:53:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1198. [2021-11-09 10:53:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.504594820384294) internal successors, (1801), 1197 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1801 transitions. [2021-11-09 10:53:08,653 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1801 transitions. Word has length 52 [2021-11-09 10:53:08,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:08,653 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 1801 transitions. [2021-11-09 10:53:08,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1801 transitions. [2021-11-09 10:53:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:53:08,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:08,654 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:08,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-11-09 10:53:08,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-11-09 10:53:08,854 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2143773892, now seen corresponding path program 68 times [2021-11-09 10:53:08,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:08,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870621324] [2021-11-09 10:53:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:08,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-09 10:53:09,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:09,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870621324] [2021-11-09 10:53:09,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870621324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:09,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353971974] [2021-11-09 10:53:09,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:53:09,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:09,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:09,214 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:09,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-11-09 10:53:11,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:53:11,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:53:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 10:53:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-09 10:53:11,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353971974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:11,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:11,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-09 10:53:11,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986614438] [2021-11-09 10:53:11,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:53:11,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:11,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:53:11,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:53:11,482 INFO L87 Difference]: Start difference. First operand 1198 states and 1801 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:12,480 INFO L93 Difference]: Finished difference Result 1326 states and 1928 transitions. [2021-11-09 10:53:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 10:53:12,480 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 10:53:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:12,481 INFO L225 Difference]: With dead ends: 1326 [2021-11-09 10:53:12,481 INFO L226 Difference]: Without dead ends: 1299 [2021-11-09 10:53:12,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=2465, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 10:53:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-11-09 10:53:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1198. [2021-11-09 10:53:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.5037593984962405) internal successors, (1800), 1197 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1800 transitions. [2021-11-09 10:53:12,542 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1800 transitions. Word has length 52 [2021-11-09 10:53:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:12,543 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 1800 transitions. [2021-11-09 10:53:12,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1800 transitions. [2021-11-09 10:53:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:53:12,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:12,544 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:12,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-11-09 10:53:12,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:12,744 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:12,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:12,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1498079054, now seen corresponding path program 69 times [2021-11-09 10:53:12,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:12,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013735146] [2021-11-09 10:53:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:12,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-09 10:53:13,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:13,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013735146] [2021-11-09 10:53:13,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013735146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:13,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960614662] [2021-11-09 10:53:13,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:53:13,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:13,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:13,126 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:13,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-11-09 10:53:18,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 10:53:18,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:53:18,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 10:53:18,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 63 proven. 42 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-09 10:53:18,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960614662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:18,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:18,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 39 [2021-11-09 10:53:18,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568927054] [2021-11-09 10:53:18,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 10:53:18,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:18,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 10:53:18,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1394, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:53:18,602 INFO L87 Difference]: Start difference. First operand 1198 states and 1800 transitions. Second operand has 39 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:21,314 INFO L93 Difference]: Finished difference Result 1674 states and 2287 transitions. [2021-11-09 10:53:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-09 10:53:21,315 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 10:53:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:21,316 INFO L225 Difference]: With dead ends: 1674 [2021-11-09 10:53:21,316 INFO L226 Difference]: Without dead ends: 1252 [2021-11-09 10:53:21,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=337, Invalid=7673, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 10:53:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-11-09 10:53:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1125. [2021-11-09 10:53:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 1.4875444839857652) internal successors, (1672), 1124 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1672 transitions. [2021-11-09 10:53:21,375 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1672 transitions. Word has length 52 [2021-11-09 10:53:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:21,376 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1672 transitions. [2021-11-09 10:53:21,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1672 transitions. [2021-11-09 10:53:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:53:21,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:21,378 INFO L513 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:21,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-11-09 10:53:21,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:21,591 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:21,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:21,592 INFO L85 PathProgramCache]: Analyzing trace with hash 870674044, now seen corresponding path program 42 times [2021-11-09 10:53:21,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:21,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361299826] [2021-11-09 10:53:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:21,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:53:22,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:22,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361299826] [2021-11-09 10:53:22,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361299826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:22,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256003445] [2021-11-09 10:53:22,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:53:22,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:22,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:22,687 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:22,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-11-09 10:53:45,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-11-09 10:53:45,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:53:45,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-09 10:53:45,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:53:45,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256003445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:45,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:45,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-09 10:53:45,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231183035] [2021-11-09 10:53:45,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 10:53:45,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:45,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 10:53:45,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 10:53:45,815 INFO L87 Difference]: Start difference. First operand 1125 states and 1672 transitions. Second operand has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:47,948 INFO L93 Difference]: Finished difference Result 1494 states and 2329 transitions. [2021-11-09 10:53:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 10:53:47,949 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 10:53:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:47,950 INFO L225 Difference]: With dead ends: 1494 [2021-11-09 10:53:47,950 INFO L226 Difference]: Without dead ends: 1434 [2021-11-09 10:53:47,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:53:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-11-09 10:53:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1156. [2021-11-09 10:53:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 1.4891774891774892) internal successors, (1720), 1155 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1720 transitions. [2021-11-09 10:53:48,044 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1720 transitions. Word has length 52 [2021-11-09 10:53:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:48,044 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1720 transitions. [2021-11-09 10:53:48,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1720 transitions. [2021-11-09 10:53:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 10:53:48,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:48,045 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:48,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-11-09 10:53:48,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-11-09 10:53:48,246 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:48,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:48,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1090053074, now seen corresponding path program 70 times [2021-11-09 10:53:48,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:48,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786439784] [2021-11-09 10:53:48,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:48,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-09 10:53:48,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:48,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786439784] [2021-11-09 10:53:48,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786439784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:48,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214462736] [2021-11-09 10:53:48,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:53:48,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:48,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:48,490 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:48,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-11-09 10:53:50,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:53:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:53:50,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-09 10:53:50,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-09 10:53:50,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214462736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:50,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:50,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-11-09 10:53:50,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376670515] [2021-11-09 10:53:50,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:53:50,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:53:50,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:53:50,780 INFO L87 Difference]: Start difference. First operand 1156 states and 1720 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:59,609 INFO L93 Difference]: Finished difference Result 1271 states and 1837 transitions. [2021-11-09 10:53:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 10:53:59,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 10:53:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:59,611 INFO L225 Difference]: With dead ends: 1271 [2021-11-09 10:53:59,611 INFO L226 Difference]: Without dead ends: 1267 [2021-11-09 10:53:59,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1085, Invalid=4921, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 10:53:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-11-09 10:53:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1201. [2021-11-09 10:53:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 1.4716666666666667) internal successors, (1766), 1200 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1766 transitions. [2021-11-09 10:53:59,697 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1766 transitions. Word has length 53 [2021-11-09 10:53:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:59,698 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 1766 transitions. [2021-11-09 10:53:59,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1766 transitions. [2021-11-09 10:53:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 10:53:59,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:59,699 INFO L513 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:59,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-11-09 10:53:59,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-11-09 10:53:59,899 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2086370337, now seen corresponding path program 43 times [2021-11-09 10:53:59,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:59,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978757450] [2021-11-09 10:53:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:59,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:00,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:00,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978757450] [2021-11-09 10:54:00,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978757450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:00,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155310624] [2021-11-09 10:54:00,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:54:00,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:00,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:54:00,959 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:54:00,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-11-09 10:54:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:03,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-09 10:54:03,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:03,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155310624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:03,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:54:03,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-09 10:54:03,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205351356] [2021-11-09 10:54:03,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 10:54:03,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:03,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 10:54:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:54:03,426 INFO L87 Difference]: Start difference. First operand 1201 states and 1766 transitions. Second operand has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:05,637 INFO L93 Difference]: Finished difference Result 1623 states and 2527 transitions. [2021-11-09 10:54:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 10:54:05,638 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 10:54:05,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:05,639 INFO L225 Difference]: With dead ends: 1623 [2021-11-09 10:54:05,639 INFO L226 Difference]: Without dead ends: 1561 [2021-11-09 10:54:05,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=2253, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 10:54:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2021-11-09 10:54:05,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1233. [2021-11-09 10:54:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 1.4732142857142858) internal successors, (1815), 1232 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1815 transitions. [2021-11-09 10:54:05,730 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1815 transitions. Word has length 53 [2021-11-09 10:54:05,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:05,730 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 1815 transitions. [2021-11-09 10:54:05,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1815 transitions. [2021-11-09 10:54:05,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:54:05,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:05,731 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:05,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-11-09 10:54:05,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-11-09 10:54:05,932 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:54:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:05,932 INFO L85 PathProgramCache]: Analyzing trace with hash -566427668, now seen corresponding path program 71 times [2021-11-09 10:54:05,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:54:05,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686117155] [2021-11-09 10:54:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:05,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:54:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:07,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:07,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686117155] [2021-11-09 10:54:07,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686117155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:07,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248019278] [2021-11-09 10:54:07,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:54:07,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:07,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:54:07,178 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:54:07,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993d60ba-fc33-4dd1-ae6e-502b87f134e8/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process