./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be --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 68bb6d7d6818d105c8d36601291f0fbd6a765091c35c37006c1280fceb3f620a .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:04:36,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:04:36,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:04:36,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:04:36,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:04:36,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:04:36,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:04:36,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:04:36,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:04:36,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:04:36,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:04:36,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:04:36,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:04:36,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:04:36,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:04:36,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:04:36,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:04:36,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:04:36,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:04:36,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:04:36,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:04:36,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:04:36,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:04:36,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:04:36,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:04:36,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:04:36,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:04:36,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:04:36,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:04:36,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:04:36,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:04:36,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:04:36,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:04:36,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:04:36,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:04:36,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:04:36,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:04:36,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:04:36,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:04:36,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:04:36,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:04:36,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:04:36,885 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:04:36,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:04:36,886 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:04:36,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:04:36,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:04:36,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:04:36,888 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:04:36,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:04:36,889 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:04:36,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:04:36,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:04:36,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:04:36,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:04:36,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:04:36,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:04:36,890 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:04:36,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:04:36,891 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:04:36,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:04:36,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:04:36,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:04:36,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:04:36,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:04:36,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:04:36,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:04:36,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:04:36,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:04:36,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:04:36,893 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:04:36,894 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:04:36,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:04:36,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:04:36,894 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_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68bb6d7d6818d105c8d36601291f0fbd6a765091c35c37006c1280fceb3f620a [2021-10-21 19:04:37,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:04:37,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:04:37,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:04:37,179 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:04:37,180 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:04:37,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.c [2021-10-21 19:04:37,249 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/data/3e40bf466/f56d0937073248b2adfc09f0de49b806/FLAG21c33ba6f [2021-10-21 19:04:37,699 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:04:37,699 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.c [2021-10-21 19:04:37,706 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/data/3e40bf466/f56d0937073248b2adfc09f0de49b806/FLAG21c33ba6f [2021-10-21 19:04:38,065 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/data/3e40bf466/f56d0937073248b2adfc09f0de49b806 [2021-10-21 19:04:38,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:04:38,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:04:38,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:04:38,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:04:38,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:04:38,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b37278f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38, skipping insertion in model container [2021-10-21 19:04:38,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:04:38,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:04:38,292 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_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.c[597,610] [2021-10-21 19:04:38,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:04:38,317 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:04:38,329 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_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.c[597,610] [2021-10-21 19:04:38,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:04:38,350 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:04:38,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38 WrapperNode [2021-10-21 19:04:38,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:04:38,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:04:38,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:04:38,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:04:38,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:04:38,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:04:38,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:04:38,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:04:38,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:04:38,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:04:38,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:04:38,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:04:38,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38" (1/1) ... [2021-10-21 19:04:38,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:04:38,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:38,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:04:38,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:04:38,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:04:38,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:04:38,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:04:38,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:04:38,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:04:38,746 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-21 19:04:38,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:04:38 BoogieIcfgContainer [2021-10-21 19:04:38,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:04:38,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:04:38,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:04:38,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:04:38,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:04:38" (1/3) ... [2021-10-21 19:04:38,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52813dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:04:38, skipping insertion in model container [2021-10-21 19:04:38,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:38" (2/3) ... [2021-10-21 19:04:38,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52813dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:04:38, skipping insertion in model container [2021-10-21 19:04:38,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:04:38" (3/3) ... [2021-10-21 19:04:38,769 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound20.c [2021-10-21 19:04:38,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:04:38,774 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-21 19:04:38,818 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:04:38,825 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 [2021-10-21 19:04:38,825 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-21 19:04:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 15 states have (on average 1.5333333333333334) 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) [2021-10-21 19:04:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:04:38,845 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:38,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:04:38,846 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:38,852 INFO L82 PathProgramCache]: Analyzing trace with hash 890461031, now seen corresponding path program 1 times [2021-10-21 19:04:38,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:38,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044695939] [2021-10-21 19:04:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:38,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:39,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:39,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044695939] [2021-10-21 19:04:39,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044695939] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:04:39,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:04:39,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:04:39,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447388761] [2021-10-21 19:04:39,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:04:39,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:39,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:04:39,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:04:39,131 INFO L87 Difference]: Start difference. First operand has 18 states, 15 states have (on average 1.5333333333333334) 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:39,154 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-10-21 19:04:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:04:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-21 19:04:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:39,164 INFO L225 Difference]: With dead ends: 34 [2021-10-21 19:04:39,165 INFO L226 Difference]: Without dead ends: 14 [2021-10-21 19:04:39,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:04:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-21 19:04:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-21 19:04:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 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) [2021-10-21 19:04:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-21 19:04:39,202 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-10-21 19:04:39,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:39,204 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-21 19:04:39,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-21 19:04:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:04:39,205 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:39,205 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:04:39,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:04:39,206 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:39,211 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-21 19:04:39,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:39,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135653481] [2021-10-21 19:04:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:39,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:39,249 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:39,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717487037] [2021-10-21 19:04:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:39,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:39,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:39,258 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:39,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:04:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:39,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:04:39,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:39,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:39,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135653481] [2021-10-21 19:04:39,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:39,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717487037] [2021-10-21 19:04:39,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717487037] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:04:39,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:04:39,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:04:39,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810427248] [2021-10-21 19:04:39,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:04:39,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:04:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:04:39,603 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:39,708 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-10-21 19:04:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:04:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-21 19:04:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:39,709 INFO L225 Difference]: With dead ends: 30 [2021-10-21 19:04:39,709 INFO L226 Difference]: Without dead ends: 23 [2021-10-21 19:04:39,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:04:39,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-21 19:04:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-10-21 19:04:39,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.25) internal successors, (20), 17 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) [2021-10-21 19:04:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-21 19:04:39,715 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-10-21 19:04:39,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:39,716 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-21 19:04:39,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:39,717 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-21 19:04:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:04:39,717 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:39,718 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:39,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-21 19:04:39,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:39,919 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:39,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1545533000, now seen corresponding path program 1 times [2021-10-21 19:04:39,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:39,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475098202] [2021-10-21 19:04:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:39,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:39,933 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:39,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012285382] [2021-10-21 19:04:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:39,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:39,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:39,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:39,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:04:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:40,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:04:40,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:40,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:40,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475098202] [2021-10-21 19:04:40,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:40,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012285382] [2021-10-21 19:04:40,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012285382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:40,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:40,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:04:40,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253373872] [2021-10-21 19:04:40,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:04:40,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:40,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:04:40,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:04:40,320 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:40,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:40,430 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-21 19:04:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:04:40,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2021-10-21 19:04:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:40,432 INFO L225 Difference]: With dead ends: 35 [2021-10-21 19:04:40,432 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 19:04:40,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:04:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 19:04:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-10-21 19:04:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 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) [2021-10-21 19:04:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-21 19:04:40,438 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-21 19:04:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:40,438 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-21 19:04:40,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:40,439 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-21 19:04:40,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:04:40,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:40,440 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:40,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-21 19:04:40,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:40,653 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:40,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:40,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1602791302, now seen corresponding path program 1 times [2021-10-21 19:04:40,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:40,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147568851] [2021-10-21 19:04:40,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:40,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:40,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:40,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427045300] [2021-10-21 19:04:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:40,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:40,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:40,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:40,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:04:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:40,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:04:40,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:40,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:40,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147568851] [2021-10-21 19:04:40,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:40,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427045300] [2021-10-21 19:04:40,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427045300] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:40,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:40,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:04:40,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911259286] [2021-10-21 19:04:40,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:04:40,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:40,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:04:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:04:40,963 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:41,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:41,083 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-21 19:04:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:04:41,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2021-10-21 19:04:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:41,086 INFO L225 Difference]: With dead ends: 39 [2021-10-21 19:04:41,086 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 19:04:41,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:04:41,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 19:04:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-21 19:04:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 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) [2021-10-21 19:04:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-21 19:04:41,098 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2021-10-21 19:04:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:41,098 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-21 19:04:41,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-21 19:04:41,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:04:41,100 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:41,100 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:41,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:41,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:41,317 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:41,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:41,318 INFO L82 PathProgramCache]: Analyzing trace with hash -666919436, now seen corresponding path program 1 times [2021-10-21 19:04:41,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:41,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111197559] [2021-10-21 19:04:41,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:41,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:41,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:41,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688766559] [2021-10-21 19:04:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:41,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:41,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:41,333 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:41,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:04:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:41,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:04:41,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:41,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:41,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111197559] [2021-10-21 19:04:41,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:41,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688766559] [2021-10-21 19:04:41,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688766559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:41,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:41,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-21 19:04:41,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315559796] [2021-10-21 19:04:41,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:04:41,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:41,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:04:41,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:04:41,502 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2021-10-21 19:04:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:41,526 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-10-21 19:04:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:04:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 [2021-10-21 19:04:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:41,528 INFO L225 Difference]: With dead ends: 32 [2021-10-21 19:04:41,528 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 19:04:41,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:04:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 19:04:41,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-21 19:04:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 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) [2021-10-21 19:04:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-21 19:04:41,533 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2021-10-21 19:04:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:41,533 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-21 19:04:41,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) 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) [2021-10-21 19:04:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-21 19:04:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:04:41,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:41,534 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:41,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:41,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:41,749 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:41,750 INFO L82 PathProgramCache]: Analyzing trace with hash -919296115, now seen corresponding path program 1 times [2021-10-21 19:04:41,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:41,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316558087] [2021-10-21 19:04:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:41,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:41,770 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:41,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102557190] [2021-10-21 19:04:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:41,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:41,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:41,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:41,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:04:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:41,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 19:04:41,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:42,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:42,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316558087] [2021-10-21 19:04:42,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:42,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102557190] [2021-10-21 19:04:42,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102557190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:42,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:42,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:04:42,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507042759] [2021-10-21 19:04:42,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:04:42,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:42,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:04:42,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:04:42,235 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-10-21 19:04:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:42,381 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-10-21 19:04:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:04:42,382 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 [2021-10-21 19:04:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:42,383 INFO L225 Difference]: With dead ends: 38 [2021-10-21 19:04:42,383 INFO L226 Difference]: Without dead ends: 34 [2021-10-21 19:04:42,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:04:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-21 19:04:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-10-21 19:04:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 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) [2021-10-21 19:04:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-10-21 19:04:42,388 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-10-21 19:04:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:42,388 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-10-21 19:04:42,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-10-21 19:04:42,389 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-10-21 19:04:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:04:42,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:42,390 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 19:04:42,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:42,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:42,605 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:42,605 INFO L82 PathProgramCache]: Analyzing trace with hash -443375322, now seen corresponding path program 2 times [2021-10-21 19:04:42,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:42,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156025076] [2021-10-21 19:04:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:42,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:42,616 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:42,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143736422] [2021-10-21 19:04:42,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:04:42,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:42,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:42,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:42,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:04:42,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:04:42,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:42,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 19:04:42,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:43,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:43,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156025076] [2021-10-21 19:04:43,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:43,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143736422] [2021-10-21 19:04:43,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143736422] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:43,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:43,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:04:43,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579231216] [2021-10-21 19:04:43,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:04:43,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:43,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:04:43,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:04:43,034 INFO L87 Difference]: Start difference. First operand 24 states and 27 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) [2021-10-21 19:04:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:43,214 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-10-21 19:04:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:04:43,218 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 18 [2021-10-21 19:04:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:43,218 INFO L225 Difference]: With dead ends: 46 [2021-10-21 19:04:43,219 INFO L226 Difference]: Without dead ends: 44 [2021-10-21 19:04:43,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:04:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-21 19:04:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-10-21 19:04:43,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.21875) internal successors, (39), 33 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) [2021-10-21 19:04:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-21 19:04:43,229 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-10-21 19:04:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:43,229 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-21 19:04:43,230 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) [2021-10-21 19:04:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-21 19:04:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:04:43,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:43,231 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:43,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:43,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 19:04:43,453 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash -500633624, now seen corresponding path program 1 times [2021-10-21 19:04:43,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:43,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911169650] [2021-10-21 19:04:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:43,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:43,470 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:43,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981771072] [2021-10-21 19:04:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:43,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:43,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:43,478 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:43,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:04:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:43,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:04:43,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:44,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:44,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911169650] [2021-10-21 19:04:44,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:44,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981771072] [2021-10-21 19:04:44,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981771072] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:44,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:44,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:04:44,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478746499] [2021-10-21 19:04:44,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:04:44,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:44,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:04:44,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:04:44,282 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2021-10-21 19:04:44,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:44,903 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-10-21 19:04:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:04:44,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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 18 [2021-10-21 19:04:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:44,905 INFO L225 Difference]: With dead ends: 60 [2021-10-21 19:04:44,905 INFO L226 Difference]: Without dead ends: 48 [2021-10-21 19:04:44,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 439.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:04:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-21 19:04:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-10-21 19:04:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.2105263157894737) 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) [2021-10-21 19:04:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-10-21 19:04:44,912 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 18 [2021-10-21 19:04:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:44,913 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-10-21 19:04:44,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2021-10-21 19:04:44,913 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-10-21 19:04:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:04:44,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:44,914 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:44,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:45,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:45,127 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:45,128 INFO L82 PathProgramCache]: Analyzing trace with hash -701540760, now seen corresponding path program 2 times [2021-10-21 19:04:45,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:45,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410326846] [2021-10-21 19:04:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:45,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:45,139 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:45,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322741628] [2021-10-21 19:04:45,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:04:45,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:45,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:45,141 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:45,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:04:45,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:04:45,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:45,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 19:04:45,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:45,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:45,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410326846] [2021-10-21 19:04:45,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:45,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322741628] [2021-10-21 19:04:45,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322741628] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:45,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:45,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:04:45,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77858288] [2021-10-21 19:04:45,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:04:45,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:45,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:04:45,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:04:45,511 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-10-21 19:04:45,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:45,685 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-10-21 19:04:45,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:04:45,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 18 [2021-10-21 19:04:45,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:45,688 INFO L225 Difference]: With dead ends: 57 [2021-10-21 19:04:45,688 INFO L226 Difference]: Without dead ends: 55 [2021-10-21 19:04:45,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:04:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-21 19:04:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2021-10-21 19:04:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 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) [2021-10-21 19:04:45,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-10-21 19:04:45,695 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 18 [2021-10-21 19:04:45,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:45,695 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-10-21 19:04:45,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-10-21 19:04:45,695 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-10-21 19:04:45,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:04:45,696 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:45,696 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 19:04:45,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:45,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:45,917 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:45,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:45,918 INFO L82 PathProgramCache]: Analyzing trace with hash -758799062, now seen corresponding path program 2 times [2021-10-21 19:04:45,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:45,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076814146] [2021-10-21 19:04:45,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:45,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:45,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:45,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136809057] [2021-10-21 19:04:45,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:04:45,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:45,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:45,930 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:45,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:04:46,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:04:46,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:46,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:04:46,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:46,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:46,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076814146] [2021-10-21 19:04:46,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:46,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136809057] [2021-10-21 19:04:46,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136809057] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:46,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:46,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:04:46,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705065911] [2021-10-21 19:04:46,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:04:46,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:46,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:04:46,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:04:46,432 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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) [2021-10-21 19:04:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:46,756 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-10-21 19:04:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:04:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 18 [2021-10-21 19:04:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:46,757 INFO L225 Difference]: With dead ends: 60 [2021-10-21 19:04:46,757 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 19:04:46,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:04:46,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 19:04:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-10-21 19:04:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 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) [2021-10-21 19:04:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-10-21 19:04:46,764 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 18 [2021-10-21 19:04:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:46,764 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-10-21 19:04:46,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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) [2021-10-21 19:04:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-10-21 19:04:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:04:46,765 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:46,765 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:46,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:46,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:04:46,980 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:46,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:46,981 INFO L82 PathProgramCache]: Analyzing trace with hash -859769786, now seen corresponding path program 2 times [2021-10-21 19:04:46,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:46,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123400516] [2021-10-21 19:04:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:46,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:46,991 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:46,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849728848] [2021-10-21 19:04:46,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:04:46,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:47,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:47,003 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:47,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:04:47,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:04:47,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:47,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:04:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:47,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:47,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123400516] [2021-10-21 19:04:47,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:47,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849728848] [2021-10-21 19:04:47,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849728848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:47,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:47,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:04:47,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975197755] [2021-10-21 19:04:47,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:04:47,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:47,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:04:47,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:04:47,254 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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) [2021-10-21 19:04:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:47,281 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-10-21 19:04:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:04:47,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 19 [2021-10-21 19:04:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:47,282 INFO L225 Difference]: With dead ends: 50 [2021-10-21 19:04:47,283 INFO L226 Difference]: Without dead ends: 46 [2021-10-21 19:04:47,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:04:47,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-21 19:04:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-21 19:04:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 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) [2021-10-21 19:04:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-10-21 19:04:47,289 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 19 [2021-10-21 19:04:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:47,289 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-10-21 19:04:47,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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) [2021-10-21 19:04:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-10-21 19:04:47,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:04:47,290 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:47,290 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:47,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:47,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:47,513 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1564888737, now seen corresponding path program 2 times [2021-10-21 19:04:47,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:47,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255508214] [2021-10-21 19:04:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:47,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:47,523 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:47,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60403924] [2021-10-21 19:04:47,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:04:47,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:47,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:47,525 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:47,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:04:47,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:04:47,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:47,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 19:04:47,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:48,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:48,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255508214] [2021-10-21 19:04:48,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:48,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60403924] [2021-10-21 19:04:48,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60403924] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:48,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:48,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:04:48,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750983691] [2021-10-21 19:04:48,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:04:48,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:48,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:04:48,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:04:48,263 INFO L87 Difference]: Start difference. First operand 46 states and 51 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) [2021-10-21 19:04:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:48,509 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-10-21 19:04:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:04:48,509 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 21 [2021-10-21 19:04:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:48,510 INFO L225 Difference]: With dead ends: 61 [2021-10-21 19:04:48,510 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 19:04:48,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:04:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 19:04:48,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-10-21 19:04:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 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) [2021-10-21 19:04:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-10-21 19:04:48,517 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 21 [2021-10-21 19:04:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:48,517 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-10-21 19:04:48,517 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) [2021-10-21 19:04:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-10-21 19:04:48,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:04:48,518 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:48,518 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:48,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-21 19:04:48,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:48,724 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:48,724 INFO L82 PathProgramCache]: Analyzing trace with hash -285025059, now seen corresponding path program 1 times [2021-10-21 19:04:48,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:48,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766673311] [2021-10-21 19:04:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:48,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:48,751 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:48,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365456991] [2021-10-21 19:04:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:48,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:48,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:48,755 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:48,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:04:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:04:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:49,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:49,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766673311] [2021-10-21 19:04:49,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:49,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365456991] [2021-10-21 19:04:49,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365456991] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:49,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:49,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:04:49,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151524152] [2021-10-21 19:04:49,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:04:49,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:49,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:04:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:04:49,112 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2021-10-21 19:04:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:49,342 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-10-21 19:04:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:04:49,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 21 [2021-10-21 19:04:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:49,343 INFO L225 Difference]: With dead ends: 53 [2021-10-21 19:04:49,344 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 19:04:49,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:04:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 19:04:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-10-21 19:04:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.175) internal successors, (47), 41 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) [2021-10-21 19:04:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-21 19:04:49,349 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-10-21 19:04:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:49,349 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-21 19:04:49,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2021-10-21 19:04:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-21 19:04:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:04:49,351 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:49,351 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-10-21 19:04:49,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:49,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:49,561 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:49,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:49,561 INFO L82 PathProgramCache]: Analyzing trace with hash -429625836, now seen corresponding path program 3 times [2021-10-21 19:04:49,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:49,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713979058] [2021-10-21 19:04:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:49,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:49,571 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:49,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231158686] [2021-10-21 19:04:49,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:04:49,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:49,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:49,573 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:49,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:04:50,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:04:50,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:50,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:04:50,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:04:50,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:50,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713979058] [2021-10-21 19:04:50,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:50,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231158686] [2021-10-21 19:04:50,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231158686] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:50,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:50,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:04:50,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353957481] [2021-10-21 19:04:50,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:04:50,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:50,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:04:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:04:50,494 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-10-21 19:04:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:50,768 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-10-21 19:04:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:04:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 24 [2021-10-21 19:04:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:50,769 INFO L225 Difference]: With dead ends: 64 [2021-10-21 19:04:50,769 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 19:04:50,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:04:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 19:04:50,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-10-21 19:04:50,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1818181818181819) 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) [2021-10-21 19:04:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-10-21 19:04:50,775 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2021-10-21 19:04:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:50,775 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-10-21 19:04:50,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-10-21 19:04:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-10-21 19:04:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:04:50,776 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:50,776 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2021-10-21 19:04:50,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:50,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:04:50,986 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:50,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:50,987 INFO L82 PathProgramCache]: Analyzing trace with hash -486884138, now seen corresponding path program 3 times [2021-10-21 19:04:50,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:50,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938482162] [2021-10-21 19:04:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:50,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:51,008 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:51,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953405980] [2021-10-21 19:04:51,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:04:51,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:51,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:51,017 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:51,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:04:51,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:04:51,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:51,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:04:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:04:51,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:51,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938482162] [2021-10-21 19:04:51,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:51,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953405980] [2021-10-21 19:04:51,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953405980] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:51,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:51,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:04:51,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957752860] [2021-10-21 19:04:51,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:04:51,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:51,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:04:51,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:04:51,389 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-21 19:04:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:51,465 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-10-21 19:04:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:04:51,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 24 [2021-10-21 19:04:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:51,467 INFO L225 Difference]: With dead ends: 47 [2021-10-21 19:04:51,467 INFO L226 Difference]: Without dead ends: 45 [2021-10-21 19:04:51,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:04:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-21 19:04:51,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-10-21 19:04:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 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) [2021-10-21 19:04:51,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-10-21 19:04:51,475 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2021-10-21 19:04:51,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:51,476 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-10-21 19:04:51,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-21 19:04:51,476 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-10-21 19:04:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:04:51,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:51,477 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:51,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:51,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:04:51,702 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:51,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:51,702 INFO L82 PathProgramCache]: Analyzing trace with hash -433535720, now seen corresponding path program 3 times [2021-10-21 19:04:51,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:51,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693011302] [2021-10-21 19:04:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:51,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:51,714 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:51,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513708387] [2021-10-21 19:04:51,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:04:51,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:51,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:51,716 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:51,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:04:51,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:04:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:04:51,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:52,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:52,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693011302] [2021-10-21 19:04:52,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:52,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513708387] [2021-10-21 19:04:52,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513708387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:52,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:52,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:04:52,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440794956] [2021-10-21 19:04:52,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:04:52,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:04:52,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:04:52,026 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-10-21 19:04:52,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:52,062 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-10-21 19:04:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:04:52,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 25 [2021-10-21 19:04:52,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:52,064 INFO L225 Difference]: With dead ends: 48 [2021-10-21 19:04:52,064 INFO L226 Difference]: Without dead ends: 44 [2021-10-21 19:04:52,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:04:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-21 19:04:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-21 19:04:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 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) [2021-10-21 19:04:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-10-21 19:04:52,070 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2021-10-21 19:04:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:52,071 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-10-21 19:04:52,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-10-21 19:04:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-10-21 19:04:52,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:04:52,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:52,074 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:52,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:52,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:04:52,289 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:52,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:52,294 INFO L82 PathProgramCache]: Analyzing trace with hash 24155569, now seen corresponding path program 3 times [2021-10-21 19:04:52,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:52,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721439165] [2021-10-21 19:04:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:52,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:52,310 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:52,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474217474] [2021-10-21 19:04:52,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:04:52,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:52,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:52,314 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:52,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:04:53,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:04:53,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:53,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:04:53,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 19:04:53,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:53,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721439165] [2021-10-21 19:04:53,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:53,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474217474] [2021-10-21 19:04:53,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474217474] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:04:53,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:04:53,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:04:53,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377869187] [2021-10-21 19:04:53,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:04:53,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:53,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:04:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:04:53,619 INFO L87 Difference]: Start difference. First operand 44 states and 50 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) [2021-10-21 19:04:53,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:53,838 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-10-21 19:04:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:04:53,839 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 27 [2021-10-21 19:04:53,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:53,840 INFO L225 Difference]: With dead ends: 84 [2021-10-21 19:04:53,840 INFO L226 Difference]: Without dead ends: 80 [2021-10-21 19:04:53,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:04:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-21 19:04:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-10-21 19:04:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-10-21 19:04:53,847 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 27 [2021-10-21 19:04:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:53,848 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-10-21 19:04:53,848 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) [2021-10-21 19:04:53,848 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-10-21 19:04:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:04:53,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:53,849 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:53,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:54,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:04:54,056 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:54,056 INFO L82 PathProgramCache]: Analyzing trace with hash -655902801, now seen corresponding path program 2 times [2021-10-21 19:04:54,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:54,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865910615] [2021-10-21 19:04:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:54,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:54,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:54,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053205376] [2021-10-21 19:04:54,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:04:54,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:54,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:54,067 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:54,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:04:54,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:04:54,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:54,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:04:54,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:54,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:54,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865910615] [2021-10-21 19:04:54,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:54,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053205376] [2021-10-21 19:04:54,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053205376] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:54,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:54,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:04:54,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901139992] [2021-10-21 19:04:54,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:04:54,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:04:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:04:54,927 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) [2021-10-21 19:04:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:55,338 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-10-21 19:04:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:04:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 27 [2021-10-21 19:04:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:55,340 INFO L225 Difference]: With dead ends: 70 [2021-10-21 19:04:55,340 INFO L226 Difference]: Without dead ends: 66 [2021-10-21 19:04:55,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:04:55,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-21 19:04:55,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-10-21 19:04:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-10-21 19:04:55,356 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 27 [2021-10-21 19:04:55,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:55,357 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-10-21 19:04:55,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) [2021-10-21 19:04:55,357 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-10-21 19:04:55,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:04:55,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:55,358 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:55,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:55,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:04:55,564 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:55,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:55,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1078604627, now seen corresponding path program 3 times [2021-10-21 19:04:55,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:55,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192166461] [2021-10-21 19:04:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:55,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:55,582 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:55,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855485144] [2021-10-21 19:04:55,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:04:55,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:55,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:55,584 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:55,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:04:56,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:04:56,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:56,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:04:56,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 19:04:56,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:56,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192166461] [2021-10-21 19:04:56,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:56,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855485144] [2021-10-21 19:04:56,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855485144] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:04:56,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:04:56,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:04:56,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400956351] [2021-10-21 19:04:56,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:04:56,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:56,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:04:56,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:04:56,546 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-10-21 19:04:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:56,690 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-10-21 19:04:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:04:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 27 [2021-10-21 19:04:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:56,691 INFO L225 Difference]: With dead ends: 62 [2021-10-21 19:04:56,691 INFO L226 Difference]: Without dead ends: 58 [2021-10-21 19:04:56,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:04:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-21 19:04:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2021-10-21 19:04:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 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) [2021-10-21 19:04:56,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-10-21 19:04:56,698 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 27 [2021-10-21 19:04:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:56,698 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-10-21 19:04:56,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-10-21 19:04:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-10-21 19:04:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:04:56,699 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:56,699 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:56,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-21 19:04:56,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:56,905 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:56,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1957613462, now seen corresponding path program 4 times [2021-10-21 19:04:56,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:56,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834680455] [2021-10-21 19:04:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:56,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:56,914 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:56,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169305174] [2021-10-21 19:04:56,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:04:56,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:56,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:56,916 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:56,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:04:57,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:04:57,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:04:57,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:57,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:57,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834680455] [2021-10-21 19:04:57,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:57,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169305174] [2021-10-21 19:04:57,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169305174] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:57,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:57,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:04:57,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201586766] [2021-10-21 19:04:57,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:04:57,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:57,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:04:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:04:57,326 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-10-21 19:04:57,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:57,381 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-10-21 19:04:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:04:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 31 [2021-10-21 19:04:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:57,382 INFO L225 Difference]: With dead ends: 54 [2021-10-21 19:04:57,382 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 19:04:57,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:04:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 19:04:57,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-21 19:04:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-10-21 19:04:57,389 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 31 [2021-10-21 19:04:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:57,389 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-10-21 19:04:57,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-10-21 19:04:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-10-21 19:04:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:04:57,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:57,391 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:57,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:57,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:57,607 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:57,607 INFO L82 PathProgramCache]: Analyzing trace with hash -553888196, now seen corresponding path program 5 times [2021-10-21 19:04:57,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:57,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670937034] [2021-10-21 19:04:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:57,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:57,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:57,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383456714] [2021-10-21 19:04:57,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:04:57,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:57,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:57,620 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:57,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:04:57,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 19:04:57,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:57,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:04:57,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:58,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:58,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670937034] [2021-10-21 19:04:58,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:58,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383456714] [2021-10-21 19:04:58,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383456714] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:58,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:58,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:04:58,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356626296] [2021-10-21 19:04:58,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:04:58,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:58,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:04:58,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:04:58,031 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-10-21 19:04:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:58,107 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-10-21 19:04:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:04:58,108 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 37 [2021-10-21 19:04:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:58,108 INFO L225 Difference]: With dead ends: 60 [2021-10-21 19:04:58,108 INFO L226 Difference]: Without dead ends: 56 [2021-10-21 19:04:58,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:04:58,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-21 19:04:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-21 19:04:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:04:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-10-21 19:04:58,117 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 37 [2021-10-21 19:04:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:58,117 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-10-21 19:04:58,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-10-21 19:04:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-10-21 19:04:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:04:58,118 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:58,118 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:58,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:58,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:58,341 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:58,341 INFO L82 PathProgramCache]: Analyzing trace with hash 835999374, now seen corresponding path program 6 times [2021-10-21 19:04:58,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:58,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270027777] [2021-10-21 19:04:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:58,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:58,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:58,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070056606] [2021-10-21 19:04:58,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:04:58,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:58,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:58,355 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:58,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:04:59,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-21 19:04:59,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:04:59,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:04:59,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:59,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:04:59,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270027777] [2021-10-21 19:04:59,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:04:59,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070056606] [2021-10-21 19:04:59,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070056606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:04:59,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:04:59,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:04:59,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000656438] [2021-10-21 19:04:59,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:04:59,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:04:59,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:04:59,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:04:59,506 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2021-10-21 19:04:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:59,590 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-10-21 19:04:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:04:59,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 43 [2021-10-21 19:04:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:59,591 INFO L225 Difference]: With dead ends: 66 [2021-10-21 19:04:59,591 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 19:04:59,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:04:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 19:04:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-21 19:04:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 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) [2021-10-21 19:04:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-10-21 19:04:59,606 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 43 [2021-10-21 19:04:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:59,607 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-10-21 19:04:59,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2021-10-21 19:04:59,607 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-10-21 19:04:59,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:04:59,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:59,608 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:59,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:59,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:59,815 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:04:59,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:59,815 INFO L82 PathProgramCache]: Analyzing trace with hash -194293408, now seen corresponding path program 7 times [2021-10-21 19:04:59,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:04:59,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410733667] [2021-10-21 19:04:59,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:59,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:04:59,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:04:59,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28205907] [2021-10-21 19:04:59,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:04:59,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:04:59,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:59,829 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:04:59,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:05:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:05:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:05:00,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:00,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:00,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410733667] [2021-10-21 19:05:00,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:00,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28205907] [2021-10-21 19:05:00,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28205907] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:00,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:00,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:05:00,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014090153] [2021-10-21 19:05:00,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:05:00,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:00,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:05:00,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:05:00,339 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-10-21 19:05:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:00,427 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-10-21 19:05:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:05:00,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 49 [2021-10-21 19:05:00,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:00,429 INFO L225 Difference]: With dead ends: 72 [2021-10-21 19:05:00,429 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 19:05:00,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:05:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 19:05:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-21 19:05:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-10-21 19:05:00,438 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 49 [2021-10-21 19:05:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:00,438 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-10-21 19:05:00,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-10-21 19:05:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-10-21 19:05:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:05:00,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:00,439 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:00,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:00,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:05:00,653 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash 691758770, now seen corresponding path program 8 times [2021-10-21 19:05:00,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:00,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658611538] [2021-10-21 19:05:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:00,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:00,662 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:00,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131711091] [2021-10-21 19:05:00,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:05:00,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:00,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:00,663 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:00,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:05:00,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:05:00,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:05:00,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:05:00,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:01,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:01,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658611538] [2021-10-21 19:05:01,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:01,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131711091] [2021-10-21 19:05:01,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131711091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:01,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:01,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:05:01,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343173534] [2021-10-21 19:05:01,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:05:01,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:01,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:05:01,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:05:01,179 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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) [2021-10-21 19:05:01,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:01,266 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-10-21 19:05:01,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:05:01,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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 55 [2021-10-21 19:05:01,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:01,267 INFO L225 Difference]: With dead ends: 78 [2021-10-21 19:05:01,268 INFO L226 Difference]: Without dead ends: 74 [2021-10-21 19:05:01,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:05:01,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-21 19:05:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-21 19:05:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-10-21 19:05:01,278 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 55 [2021-10-21 19:05:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:01,278 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-10-21 19:05:01,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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) [2021-10-21 19:05:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-10-21 19:05:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:05:01,279 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:01,279 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:01,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:01,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:05:01,501 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:01,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:01,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1453766276, now seen corresponding path program 9 times [2021-10-21 19:05:01,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:01,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277664645] [2021-10-21 19:05:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:01,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:01,508 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:01,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482646740] [2021-10-21 19:05:01,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:05:01,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:01,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:01,512 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:01,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:05:01,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-21 19:05:01,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:05:01,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:05:01,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:02,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:02,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277664645] [2021-10-21 19:05:02,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:02,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482646740] [2021-10-21 19:05:02,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482646740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:02,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:02,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:05:02,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602634788] [2021-10-21 19:05:02,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:05:02,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:05:02,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:05:02,122 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:02,260 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2021-10-21 19:05:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:05:02,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-10-21 19:05:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:02,265 INFO L225 Difference]: With dead ends: 84 [2021-10-21 19:05:02,266 INFO L226 Difference]: Without dead ends: 80 [2021-10-21 19:05:02,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:05:02,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-21 19:05:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-21 19:05:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-10-21 19:05:02,275 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 61 [2021-10-21 19:05:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:02,275 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-10-21 19:05:02,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-10-21 19:05:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-21 19:05:02,276 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:02,276 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:02,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:02,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:05:02,493 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:02,493 INFO L82 PathProgramCache]: Analyzing trace with hash -118005546, now seen corresponding path program 10 times [2021-10-21 19:05:02,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:02,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512209751] [2021-10-21 19:05:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:02,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:02,501 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:02,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878860087] [2021-10-21 19:05:02,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:05:02,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:02,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:02,503 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:02,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:05:02,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:05:02,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:05:02,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:05:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:03,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:03,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512209751] [2021-10-21 19:05:03,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:03,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878860087] [2021-10-21 19:05:03,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878860087] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:03,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:03,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-21 19:05:03,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074445298] [2021-10-21 19:05:03,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:05:03,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:03,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:05:03,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:05:03,139 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:03,283 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-10-21 19:05:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:05:03,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-10-21 19:05:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:03,285 INFO L225 Difference]: With dead ends: 90 [2021-10-21 19:05:03,285 INFO L226 Difference]: Without dead ends: 86 [2021-10-21 19:05:03,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:05:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-21 19:05:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-10-21 19:05:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2021-10-21 19:05:03,302 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 67 [2021-10-21 19:05:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:03,302 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2021-10-21 19:05:03,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:03,303 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2021-10-21 19:05:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-21 19:05:03,303 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:03,304 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:03,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:03,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:05:03,528 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:03,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1952417192, now seen corresponding path program 11 times [2021-10-21 19:05:03,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:03,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454577328] [2021-10-21 19:05:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:03,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:03,538 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:03,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944670568] [2021-10-21 19:05:03,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:05:03,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:03,540 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:03,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:05:04,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-21 19:05:04,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:05:04,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 19:05:04,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:05,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:05,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454577328] [2021-10-21 19:05:05,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:05,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944670568] [2021-10-21 19:05:05,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944670568] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:05,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:05,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-21 19:05:05,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781269292] [2021-10-21 19:05:05,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:05:05,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:05,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:05:05,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:05:05,059 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 14 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) [2021-10-21 19:05:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:05,208 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-10-21 19:05:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:05:05,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 14 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 73 [2021-10-21 19:05:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:05,210 INFO L225 Difference]: With dead ends: 96 [2021-10-21 19:05:05,210 INFO L226 Difference]: Without dead ends: 92 [2021-10-21 19:05:05,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:05:05,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-21 19:05:05,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-21 19:05:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 91 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-10-21 19:05:05,220 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 73 [2021-10-21 19:05:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:05,221 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-10-21 19:05:05,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 14 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) [2021-10-21 19:05:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-10-21 19:05:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-21 19:05:05,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:05,222 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:05,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-21 19:05:05,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:05:05,430 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:05,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:05,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2030484230, now seen corresponding path program 12 times [2021-10-21 19:05:05,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:05,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129635677] [2021-10-21 19:05:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:05,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:05,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:05,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688210012] [2021-10-21 19:05:05,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:05:05,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:05,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:05,449 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:05,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:05:07,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-21 19:05:07,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:05:07,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 19:05:07,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:07,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:07,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129635677] [2021-10-21 19:05:07,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:07,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688210012] [2021-10-21 19:05:07,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688210012] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:07,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:07,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-21 19:05:07,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095332163] [2021-10-21 19:05:07,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:05:07,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:07,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:05:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:05:07,559 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:07,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:07,718 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2021-10-21 19:05:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 19:05:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-10-21 19:05:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:07,720 INFO L225 Difference]: With dead ends: 102 [2021-10-21 19:05:07,720 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 19:05:07,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:05:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 19:05:07,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-21 19:05:07,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 97 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) [2021-10-21 19:05:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2021-10-21 19:05:07,730 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 79 [2021-10-21 19:05:07,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:07,730 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2021-10-21 19:05:07,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2021-10-21 19:05:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-21 19:05:07,731 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:07,731 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:07,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:07,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:05:07,932 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:07,933 INFO L82 PathProgramCache]: Analyzing trace with hash 986103500, now seen corresponding path program 13 times [2021-10-21 19:05:07,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:07,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308770585] [2021-10-21 19:05:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:07,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:07,941 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:07,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638671770] [2021-10-21 19:05:07,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:05:07,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:07,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:07,942 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:07,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 19:05:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:05:08,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-21 19:05:08,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:08,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:08,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308770585] [2021-10-21 19:05:08,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:08,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638671770] [2021-10-21 19:05:08,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638671770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:08,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:08,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-21 19:05:08,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847962807] [2021-10-21 19:05:08,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:05:08,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:08,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:05:08,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:05:08,725 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:08,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:08,883 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-10-21 19:05:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:05:08,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-10-21 19:05:08,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:08,884 INFO L225 Difference]: With dead ends: 108 [2021-10-21 19:05:08,884 INFO L226 Difference]: Without dead ends: 104 [2021-10-21 19:05:08,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:05:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-21 19:05:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-21 19:05:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 103 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) [2021-10-21 19:05:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2021-10-21 19:05:08,896 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 85 [2021-10-21 19:05:08,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:08,896 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2021-10-21 19:05:08,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:08,897 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2021-10-21 19:05:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-21 19:05:08,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:08,898 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:08,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:09,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:05:09,113 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1471288094, now seen corresponding path program 14 times [2021-10-21 19:05:09,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:09,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830269538] [2021-10-21 19:05:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:09,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:09,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:09,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130988113] [2021-10-21 19:05:09,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:05:09,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:09,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:09,122 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:09,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 19:05:09,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:05:09,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:05:09,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 19:05:09,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:09,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:09,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830269538] [2021-10-21 19:05:09,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:09,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130988113] [2021-10-21 19:05:09,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130988113] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:09,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:09,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-21 19:05:09,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265083009] [2021-10-21 19:05:09,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:05:09,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:09,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:05:09,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:05:09,987 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:10,150 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2021-10-21 19:05:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:05:10,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-10-21 19:05:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:10,152 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:05:10,152 INFO L226 Difference]: Without dead ends: 110 [2021-10-21 19:05:10,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:05:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-21 19:05:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-21 19:05:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:10,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-10-21 19:05:10,179 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 91 [2021-10-21 19:05:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:10,179 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-10-21 19:05:10,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-10-21 19:05:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-21 19:05:10,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:10,181 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:10,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:10,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:10,393 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:10,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:10,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1435329008, now seen corresponding path program 15 times [2021-10-21 19:05:10,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:10,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965694387] [2021-10-21 19:05:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:10,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:10,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:10,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057708324] [2021-10-21 19:05:10,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:05:10,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:10,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:10,403 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:10,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 19:05:12,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-21 19:05:12,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:05:12,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 19:05:12,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:12,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:12,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965694387] [2021-10-21 19:05:12,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:12,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057708324] [2021-10-21 19:05:12,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057708324] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:12,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:12,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-21 19:05:12,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989913116] [2021-10-21 19:05:12,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:05:12,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:05:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:05:12,881 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 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) [2021-10-21 19:05:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:13,090 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2021-10-21 19:05:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 19:05:13,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 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 97 [2021-10-21 19:05:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:13,092 INFO L225 Difference]: With dead ends: 120 [2021-10-21 19:05:13,092 INFO L226 Difference]: Without dead ends: 116 [2021-10-21 19:05:13,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 19:05:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-21 19:05:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-10-21 19:05:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1565217391304348) internal successors, (133), 115 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2021-10-21 19:05:13,102 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 97 [2021-10-21 19:05:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:13,102 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2021-10-21 19:05:13,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 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) [2021-10-21 19:05:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2021-10-21 19:05:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-21 19:05:13,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:13,103 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:13,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:13,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:13,309 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:13,309 INFO L82 PathProgramCache]: Analyzing trace with hash -837629118, now seen corresponding path program 16 times [2021-10-21 19:05:13,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:13,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053298022] [2021-10-21 19:05:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:13,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:13,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:13,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202098931] [2021-10-21 19:05:13,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:05:13,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:13,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:13,323 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:13,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 19:05:13,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:05:13,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:05:13,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:05:13,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:14,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:14,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053298022] [2021-10-21 19:05:14,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:14,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202098931] [2021-10-21 19:05:14,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202098931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:14,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:14,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-21 19:05:14,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311440324] [2021-10-21 19:05:14,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:05:14,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:05:14,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:05:14,347 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:14,597 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2021-10-21 19:05:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-21 19:05:14,598 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-10-21 19:05:14,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:14,599 INFO L225 Difference]: With dead ends: 126 [2021-10-21 19:05:14,599 INFO L226 Difference]: Without dead ends: 122 [2021-10-21 19:05:14,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:05:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-21 19:05:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-10-21 19:05:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 121 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2021-10-21 19:05:14,612 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 103 [2021-10-21 19:05:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:14,613 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2021-10-21 19:05:14,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:14,613 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2021-10-21 19:05:14,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-21 19:05:14,615 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:14,615 INFO L512 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:14,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:14,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:14,817 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:14,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1860464404, now seen corresponding path program 17 times [2021-10-21 19:05:14,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:14,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382589656] [2021-10-21 19:05:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:14,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:14,838 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:14,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183486021] [2021-10-21 19:05:14,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:05:14,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:14,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:14,842 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:14,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 19:05:28,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-21 19:05:28,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:05:28,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-21 19:05:28,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:29,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:29,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382589656] [2021-10-21 19:05:29,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:29,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183486021] [2021-10-21 19:05:29,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183486021] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:29,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:29,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-21 19:05:29,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870417160] [2021-10-21 19:05:29,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:05:29,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:05:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:05:29,325 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:29,583 INFO L93 Difference]: Finished difference Result 132 states and 151 transitions. [2021-10-21 19:05:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-21 19:05:29,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-10-21 19:05:29,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:29,584 INFO L225 Difference]: With dead ends: 132 [2021-10-21 19:05:29,584 INFO L226 Difference]: Without dead ends: 128 [2021-10-21 19:05:29,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 19:05:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-21 19:05:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-10-21 19:05:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 127 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 147 transitions. [2021-10-21 19:05:29,600 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 147 transitions. Word has length 109 [2021-10-21 19:05:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:29,600 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 147 transitions. [2021-10-21 19:05:29,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 147 transitions. [2021-10-21 19:05:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-21 19:05:29,602 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:29,602 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:29,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:29,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:05:29,813 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:29,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1804365158, now seen corresponding path program 18 times [2021-10-21 19:05:29,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:29,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10282422] [2021-10-21 19:05:29,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:29,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:29,823 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:29,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911282227] [2021-10-21 19:05:29,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:05:29,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:29,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:29,825 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:29,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-21 19:05:32,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-21 19:05:32,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:05:32,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-21 19:05:32,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:33,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:33,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10282422] [2021-10-21 19:05:33,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:33,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911282227] [2021-10-21 19:05:33,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911282227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:33,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:33,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-21 19:05:33,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203023696] [2021-10-21 19:05:33,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:05:33,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:33,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:05:33,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:05:33,182 INFO L87 Difference]: Start difference. First operand 128 states and 147 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:33,427 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2021-10-21 19:05:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-21 19:05:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-10-21 19:05:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:33,429 INFO L225 Difference]: With dead ends: 138 [2021-10-21 19:05:33,429 INFO L226 Difference]: Without dead ends: 134 [2021-10-21 19:05:33,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:05:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-21 19:05:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-10-21 19:05:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1578947368421053) internal successors, (154), 133 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2021-10-21 19:05:33,447 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 115 [2021-10-21 19:05:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:33,447 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2021-10-21 19:05:33,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2021-10-21 19:05:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-10-21 19:05:33,449 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:33,449 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:33,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-21 19:05:33,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-21 19:05:33,660 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:33,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1870456376, now seen corresponding path program 19 times [2021-10-21 19:05:33,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:33,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203861433] [2021-10-21 19:05:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:33,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:33,669 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:33,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278472908] [2021-10-21 19:05:33,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:05:33,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:33,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:33,671 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:33,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-21 19:05:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:05:34,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-21 19:05:34,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:05:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:05:34,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:05:34,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203861433] [2021-10-21 19:05:34,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:05:34,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278472908] [2021-10-21 19:05:34,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278472908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:05:34,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:05:34,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-21 19:05:34,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687648842] [2021-10-21 19:05:34,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:05:34,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:05:34,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:05:34,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:05:34,869 INFO L87 Difference]: Start difference. First operand 134 states and 154 transitions. Second operand has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:05:35,169 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2021-10-21 19:05:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-21 19:05:35,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-10-21 19:05:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:05:35,171 INFO L225 Difference]: With dead ends: 144 [2021-10-21 19:05:35,171 INFO L226 Difference]: Without dead ends: 140 [2021-10-21 19:05:35,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:05:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-21 19:05:35,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-10-21 19:05:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.158273381294964) internal successors, (161), 139 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) [2021-10-21 19:05:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 161 transitions. [2021-10-21 19:05:35,186 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 161 transitions. Word has length 121 [2021-10-21 19:05:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:05:35,187 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 161 transitions. [2021-10-21 19:05:35,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:05:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 161 transitions. [2021-10-21 19:05:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-21 19:05:35,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:05:35,189 INFO L512 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-10-21 19:05:35,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:35,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:35,401 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:05:35,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:05:35,401 INFO L82 PathProgramCache]: Analyzing trace with hash 269482378, now seen corresponding path program 20 times [2021-10-21 19:05:35,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:05:35,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485084546] [2021-10-21 19:05:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:05:35,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:05:35,418 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:05:35,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71316836] [2021-10-21 19:05:35,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:05:35,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:05:35,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:05:35,433 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:05:35,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-21 19:05:36,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:05:36,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-21 19:05:36,541 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:05:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:05:36,876 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:05:36,877 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:05:36,878 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:05:36,880 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:05:36,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-21 19:05:37,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 19:05:37,095 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:05:37,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:05:37 BoogieIcfgContainer [2021-10-21 19:05:37,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:05:37,207 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:05:37,207 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:05:37,208 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:05:37,208 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:04:38" (3/4) ... [2021-10-21 19:05:37,210 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:05:37,323 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:05:37,323 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:05:37,325 INFO L168 Benchmark]: Toolchain (without parser) took 59254.35 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 48.3 MB in the beginning and 42.9 MB in the end (delta: 5.5 MB). Peak memory consumption was 64.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:05:37,325 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 90.2 MB. Free memory was 64.4 MB in the beginning and 64.3 MB in the end (delta: 41.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:05:37,326 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.24 ms. Allocated memory is still 90.2 MB. Free memory was 48.1 MB in the beginning and 64.3 MB in the end (delta: -16.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-21 19:05:37,326 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.04 ms. Allocated memory is still 90.2 MB. Free memory was 64.3 MB in the beginning and 62.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:05:37,326 INFO L168 Benchmark]: Boogie Preprocessor took 35.54 ms. Allocated memory is still 90.2 MB. Free memory was 62.7 MB in the beginning and 61.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:05:37,327 INFO L168 Benchmark]: RCFGBuilder took 324.57 ms. Allocated memory is still 90.2 MB. Free memory was 61.7 MB in the beginning and 51.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:05:37,327 INFO L168 Benchmark]: TraceAbstraction took 58447.87 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 51.5 MB in the beginning and 36.1 MB in the end (delta: 15.4 MB). Peak memory consumption was 70.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:05:37,328 INFO L168 Benchmark]: Witness Printer took 115.93 ms. Allocated memory is still 132.1 MB. Free memory was 36.1 MB in the beginning and 42.9 MB in the end (delta: -6.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:05:37,330 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 90.2 MB. Free memory was 64.4 MB in the beginning and 64.3 MB in the end (delta: 41.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.24 ms. Allocated memory is still 90.2 MB. Free memory was 48.1 MB in the beginning and 64.3 MB in the end (delta: -16.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.04 ms. Allocated memory is still 90.2 MB. Free memory was 64.3 MB in the beginning and 62.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.54 ms. Allocated memory is still 90.2 MB. Free memory was 62.7 MB in the beginning and 61.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 324.57 ms. Allocated memory is still 90.2 MB. Free memory was 61.7 MB in the beginning and 51.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 58447.87 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 51.5 MB in the beginning and 36.1 MB in the end (delta: 15.4 MB). Peak memory consumption was 70.7 MB. Max. memory is 16.1 GB. * Witness Printer took 115.93 ms. Allocated memory is still 132.1 MB. Free memory was 36.1 MB in the beginning and 42.9 MB in the end (delta: -6.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0] [L31] EXPR counter++ VAL [counter=1] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x <= X)) VAL [counter=1] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=1] [L45] x++ VAL [counter=1] [L31] EXPR counter++ VAL [counter=2] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(x <= X)) VAL [counter=2] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=2] [L45] x++ VAL [counter=2] [L31] EXPR counter++ VAL [counter=3] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=3] [L35] COND FALSE !(!(x <= X)) VAL [counter=3] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=3] [L45] x++ VAL [counter=3] [L31] EXPR counter++ VAL [counter=4] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=4] [L35] COND FALSE !(!(x <= X)) VAL [counter=4] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=4] [L45] x++ VAL [counter=4] [L31] EXPR counter++ VAL [counter=5] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=5] [L35] COND FALSE !(!(x <= X)) VAL [counter=5] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=5] [L45] x++ VAL [counter=5] [L31] EXPR counter++ VAL [counter=6] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=6] [L35] COND FALSE !(!(x <= X)) VAL [counter=6] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=6] [L45] x++ VAL [counter=6] [L31] EXPR counter++ VAL [counter=7] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=7] [L35] COND FALSE !(!(x <= X)) VAL [counter=7] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=7] [L45] x++ VAL [counter=7] [L31] EXPR counter++ VAL [counter=8] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=8] [L35] COND FALSE !(!(x <= X)) VAL [counter=8] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=8] [L45] x++ VAL [counter=8] [L31] EXPR counter++ VAL [counter=9] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=9] [L35] COND FALSE !(!(x <= X)) VAL [counter=9] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=9] [L45] x++ VAL [counter=9] [L31] EXPR counter++ VAL [counter=10] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=10] [L35] COND FALSE !(!(x <= X)) VAL [counter=10] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=10] [L45] x++ VAL [counter=10] [L31] EXPR counter++ VAL [counter=11] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=11] [L35] COND FALSE !(!(x <= X)) VAL [counter=11] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=11] [L45] x++ VAL [counter=11] [L31] EXPR counter++ VAL [counter=12] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=12] [L35] COND FALSE !(!(x <= X)) VAL [counter=12] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=12] [L45] x++ VAL [counter=12] [L31] EXPR counter++ VAL [counter=13] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=13] [L35] COND FALSE !(!(x <= X)) VAL [counter=13] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=13] [L45] x++ VAL [counter=13] [L31] EXPR counter++ VAL [counter=14] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=14] [L35] COND FALSE !(!(x <= X)) VAL [counter=14] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=14] [L45] x++ VAL [counter=14] [L31] EXPR counter++ VAL [counter=15] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=15] [L35] COND FALSE !(!(x <= X)) VAL [counter=15] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=15] [L45] x++ VAL [counter=15] [L31] EXPR counter++ VAL [counter=16] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=16] [L35] COND FALSE !(!(x <= X)) VAL [counter=16] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=16] [L45] x++ VAL [counter=16] [L31] EXPR counter++ VAL [counter=17] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=17] [L35] COND FALSE !(!(x <= X)) VAL [counter=17] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=17] [L45] x++ VAL [counter=17] [L31] EXPR counter++ VAL [counter=18] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=18] [L35] COND FALSE !(!(x <= X)) VAL [counter=18] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=18] [L45] x++ VAL [counter=18] [L31] EXPR counter++ VAL [counter=19] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=19] [L35] COND FALSE !(!(x <= X)) VAL [counter=19] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=19] [L45] x++ VAL [counter=19] [L31] EXPR counter++ VAL [counter=20] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=20] [L35] COND FALSE !(!(x <= X)) VAL [counter=20] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=20] [L45] x++ VAL [counter=20] [L31] EXPR counter++ VAL [counter=21] [L31] COND FALSE !(counter++<20) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=21] [L16] reach_error() VAL [counter=21] - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 58277.0ms, OverallIterations: 36, TraceHistogramMax: 21, EmptinessCheckTime: 38.4ms, AutomataDifference: 6205.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 434 SDtfs, 666 SDslu, 2272 SDs, 0 SdLazy, 1893 SolverSat, 172 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2428.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1785 GetRequests, 1216 SyntacticMatches, 0 SemanticMatches, 569 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 5205.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=140occurred in iteration=35, InterpolantAutomatonStates: 603, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 324.7ms AutomataMinimizationTime, 35 MinimizatonAttempts, 159 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 339.6ms SsaConstructionTime, 23588.1ms SatisfiabilityAnalysisTime, 10044.7ms InterpolantComputationTime, 1694 NumberOfCodeBlocks, 1646 NumberOfCodeBlocksAsserted, 148 NumberOfCheckSat, 1532 ConstructedInterpolants, 0 QuantifiedInterpolants, 7216 SizeOfPredicates, 342 NumberOfNonLiveVariables, 6848 ConjunctsInSsa, 791 ConjunctsInUnsatCore, 35 InterpolantComputations, 4 PerfectInterpolantSequences, 112/7450 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:05:37,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe07c4-f7f8-4d33-8b71-6394bcf411b2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...