./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.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_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/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_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/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_ac43979e-a7ab-475d-8c1f-e04597b46d40/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 aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 19:27:26,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:27:26,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:27:26,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:27:26,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:27:26,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:27:26,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:27:26,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:27:26,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:27:26,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:27:26,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:27:26,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:27:26,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:27:26,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:27:26,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:27:26,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:27:26,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:27:26,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:27:26,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:27:26,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:27:26,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:27:26,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:27:26,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:27:26,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:27:26,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:27:26,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:27:26,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:27:26,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:27:26,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:27:26,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:27:26,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:27:26,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:27:26,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:27:26,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:27:26,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:27:26,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:27:26,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:27:26,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:27:26,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:27:26,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:27:26,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:27:26,421 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:27:26,464 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:27:26,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:27:26,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:27:26,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:27:26,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:27:26,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:27:26,473 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:27:26,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:27:26,474 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:27:26,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:27:26,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:27:26,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:27:26,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:27:26,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:27:26,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:27:26,476 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:27:26,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:27:26,477 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:27:26,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:27:26,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:27:26,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:27:26,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:27:26,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:27:26,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:27:26,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:27:26,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:27:26,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:27:26,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:27:26,480 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:27:26,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:27:26,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:27:26,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:27:26,482 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_ac43979e-a7ab-475d-8c1f-e04597b46d40/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 [2021-10-21 19:27:26,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:27:26,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:27:26,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:27:26,864 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:27:26,865 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:27:26,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-10-21 19:27:26,926 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/data/477e730fb/e34b4a8ffd9f4915accbfa068c30282e/FLAG5e1598c1a [2021-10-21 19:27:27,459 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:27:27,460 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-10-21 19:27:27,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/data/477e730fb/e34b4a8ffd9f4915accbfa068c30282e/FLAG5e1598c1a [2021-10-21 19:27:27,783 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/data/477e730fb/e34b4a8ffd9f4915accbfa068c30282e [2021-10-21 19:27:27,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:27:27,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:27:27,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:27:27,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:27:27,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:27:27,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:27:27" (1/1) ... [2021-10-21 19:27:27,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a232653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:27, skipping insertion in model container [2021-10-21 19:27:27,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:27:27" (1/1) ... [2021-10-21 19:27:27,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:27:27,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:27:27,995 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_ac43979e-a7ab-475d-8c1f-e04597b46d40/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2021-10-21 19:27:28,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:27:28,034 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:27:28,045 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_ac43979e-a7ab-475d-8c1f-e04597b46d40/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2021-10-21 19:27:28,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:27:28,069 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:27:28,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28 WrapperNode [2021-10-21 19:27:28,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:27:28,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:27:28,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:27:28,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:27:28,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28" (1/1) ... [2021-10-21 19:27:28,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28" (1/1) ... [2021-10-21 19:27:28,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:27:28,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:27:28,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:27:28,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:27:28,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28" (1/1) ... [2021-10-21 19:27:28,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28" (1/1) ... [2021-10-21 19:27:28,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28" (1/1) ... [2021-10-21 19:27:28,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28" (1/1) ... [2021-10-21 19:27:28,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28" (1/1) ... [2021-10-21 19:27:28,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28" (1/1) ... [2021-10-21 19:27:28,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28" (1/1) ... [2021-10-21 19:27:28,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:27:28,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:27:28,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:27:28,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:27:28,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28" (1/1) ... [2021-10-21 19:27:28,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:27:28,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:28,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:27:28,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:27:28,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:27:28,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:27:28,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:27:28,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:27:28,546 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:27:28,546 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-10-21 19:27:28,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:27:28 BoogieIcfgContainer [2021-10-21 19:27:28,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:27:28,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:27:28,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:27:28,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:27:28,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:27:27" (1/3) ... [2021-10-21 19:27:28,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463da5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:27:28, skipping insertion in model container [2021-10-21 19:27:28,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:28" (2/3) ... [2021-10-21 19:27:28,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463da5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:27:28, skipping insertion in model container [2021-10-21 19:27:28,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:27:28" (3/3) ... [2021-10-21 19:27:28,566 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.c [2021-10-21 19:27:28,572 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:27:28,572 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-21 19:27:28,619 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:27:28,626 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 19:27:28,626 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-21 19:27:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 19:27:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:27:28,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:28,650 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:28,650 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:28,656 INFO L82 PathProgramCache]: Analyzing trace with hash -141782897, now seen corresponding path program 1 times [2021-10-21 19:27:28,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:28,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872854699] [2021-10-21 19:27:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:28,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:28,939 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 19:27:28,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:28,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872854699] [2021-10-21 19:27:28,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872854699] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:28,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:28,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:27:28,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796649210] [2021-10-21 19:27:28,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:27:28,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:28,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:27:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:27:28,987 INFO L87 Difference]: Start difference. First operand has 43 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 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 6.5) internal successors, (13), 2 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 19:27:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:29,009 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2021-10-21 19:27:29,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:27:29,010 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 19:27:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:29,017 INFO L225 Difference]: With dead ends: 83 [2021-10-21 19:27:29,018 INFO L226 Difference]: Without dead ends: 39 [2021-10-21 19:27:29,020 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 19:27:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-21 19:27:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-21 19:27:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-10-21 19:27:29,049 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2021-10-21 19:27:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:29,050 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-10-21 19:27:29,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 19:27:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-10-21 19:27:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:27:29,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:29,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:29,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:27:29,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:29,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1057770534, now seen corresponding path program 1 times [2021-10-21 19:27:29,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:29,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681877414] [2021-10-21 19:27:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:29,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:29,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:29,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197886853] [2021-10-21 19:27:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:29,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:29,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:29,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:27:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:29,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:27:29,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:29,342 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 19:27:29,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:29,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681877414] [2021-10-21 19:27:29,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:29,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197886853] [2021-10-21 19:27:29,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197886853] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:29,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:29,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:27:29,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393152402] [2021-10-21 19:27:29,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:27:29,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:27:29,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:27:29,349 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:29,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:29,373 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-10-21 19:27:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:27:29,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-21 19:27:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:29,375 INFO L225 Difference]: With dead ends: 49 [2021-10-21 19:27:29,376 INFO L226 Difference]: Without dead ends: 41 [2021-10-21 19:27:29,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:27:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-21 19:27:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-10-21 19:27:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-10-21 19:27:29,385 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 14 [2021-10-21 19:27:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:29,386 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-10-21 19:27:29,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-10-21 19:27:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:27:29,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:29,388 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:29,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:29,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:29,613 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:29,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:29,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1568670238, now seen corresponding path program 1 times [2021-10-21 19:27:29,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:29,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027069256] [2021-10-21 19:27:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:29,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:29,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:29,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30035041] [2021-10-21 19:27:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:29,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:29,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:29,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:29,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:27:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:29,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:27:29,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:29,928 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 19:27:29,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:29,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027069256] [2021-10-21 19:27:29,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:29,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30035041] [2021-10-21 19:27:29,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30035041] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:29,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:29,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:27:29,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644806806] [2021-10-21 19:27:29,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:27:29,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:29,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:27:29,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:29,933 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 19:27:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:30,060 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-10-21 19:27:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:27:30,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 19:27:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:30,063 INFO L225 Difference]: With dead ends: 69 [2021-10-21 19:27:30,063 INFO L226 Difference]: Without dead ends: 61 [2021-10-21 19:27:30,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:27:30,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-21 19:27:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-10-21 19:27:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.25) internal successors, (45), 41 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 19:27:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-10-21 19:27:30,073 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 15 [2021-10-21 19:27:30,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:30,073 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-10-21 19:27:30,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 19:27:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-10-21 19:27:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:27:30,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:30,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:30,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-21 19:27:30,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:30,301 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:30,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:30,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1384108475, now seen corresponding path program 1 times [2021-10-21 19:27:30,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:30,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909944748] [2021-10-21 19:27:30,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:30,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:30,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:30,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290950062] [2021-10-21 19:27:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:30,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:30,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:30,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:30,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:27:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:30,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:27:30,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:30,596 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 19:27:30,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:30,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909944748] [2021-10-21 19:27:30,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:30,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290950062] [2021-10-21 19:27:30,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290950062] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:30,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:30,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:27:30,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875271159] [2021-10-21 19:27:30,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:27:30,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:30,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:27:30,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:27:30,601 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 19:27:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:30,824 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-10-21 19:27:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:27:30,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-21 19:27:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:30,827 INFO L225 Difference]: With dead ends: 80 [2021-10-21 19:27:30,827 INFO L226 Difference]: Without dead ends: 78 [2021-10-21 19:27:30,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:27:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-21 19:27:30,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2021-10-21 19:27:30,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 44 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 19:27:30,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-10-21 19:27:30,837 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2021-10-21 19:27:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:30,838 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-10-21 19:27:30,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 19:27:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-10-21 19:27:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:27:30,839 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:30,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:30,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:31,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:31,062 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:31,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1311460386, now seen corresponding path program 1 times [2021-10-21 19:27:31,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:31,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33545713] [2021-10-21 19:27:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:31,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:31,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:31,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017551887] [2021-10-21 19:27:31,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:31,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:31,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:31,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:31,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:27:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:31,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:27:31,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:31,386 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 19:27:31,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:31,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33545713] [2021-10-21 19:27:31,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:31,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017551887] [2021-10-21 19:27:31,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017551887] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:31,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:31,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:27:31,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979375320] [2021-10-21 19:27:31,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:27:31,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:31,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:27:31,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:27:31,389 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 19:27:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:31,448 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-10-21 19:27:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:27:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 19:27:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:31,450 INFO L225 Difference]: With dead ends: 64 [2021-10-21 19:27:31,450 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 19:27:31,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 19:27:31,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-10-21 19:27:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-10-21 19:27:31,458 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 18 [2021-10-21 19:27:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:31,458 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-10-21 19:27:31,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 19:27:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-10-21 19:27:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:27:31,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:31,460 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:31,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-21 19:27:31,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:31,685 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:31,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1862118746, now seen corresponding path program 1 times [2021-10-21 19:27:31,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:31,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457720529] [2021-10-21 19:27:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:31,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:31,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:31,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922997384] [2021-10-21 19:27:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:31,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:31,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:31,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:31,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:27:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:31,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:27:31,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:31,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:31,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457720529] [2021-10-21 19:27:31,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:31,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922997384] [2021-10-21 19:27:31,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922997384] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:31,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:31,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:27:31,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755859432] [2021-10-21 19:27:31,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:27:31,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:27:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:31,902 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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 19:27:31,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:31,926 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2021-10-21 19:27:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:27:31,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-21 19:27:31,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:31,928 INFO L225 Difference]: With dead ends: 85 [2021-10-21 19:27:31,928 INFO L226 Difference]: Without dead ends: 55 [2021-10-21 19:27:31,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-21 19:27:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-21 19:27:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 54 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 19:27:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-10-21 19:27:31,937 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 20 [2021-10-21 19:27:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:31,937 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-10-21 19:27:31,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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 19:27:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-10-21 19:27:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:27:31,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:31,939 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:31,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:32,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:32,153 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:32,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:32,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1887855967, now seen corresponding path program 1 times [2021-10-21 19:27:32,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:32,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669111802] [2021-10-21 19:27:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:32,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:32,165 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:32,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537820256] [2021-10-21 19:27:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:32,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:32,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:32,167 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:32,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:27:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:32,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:27:32,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:32,610 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 19:27:32,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:32,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669111802] [2021-10-21 19:27:32,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:32,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537820256] [2021-10-21 19:27:32,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537820256] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:32,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:32,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:27:32,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087468870] [2021-10-21 19:27:32,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:27:32,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:32,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:27:32,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:27:32,619 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 19:27:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:32,746 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-10-21 19:27:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:27:32,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-21 19:27:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:32,749 INFO L225 Difference]: With dead ends: 62 [2021-10-21 19:27:32,749 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 19:27:32,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:27:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 19:27:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-10-21 19:27:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 19:27:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-10-21 19:27:32,777 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2021-10-21 19:27:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:32,778 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-10-21 19:27:32,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 19:27:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-10-21 19:27:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:27:32,780 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:32,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:32,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:33,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 19:27:33,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:33,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1753227772, now seen corresponding path program 1 times [2021-10-21 19:27:33,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:33,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721065913] [2021-10-21 19:27:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:33,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:33,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:33,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748245066] [2021-10-21 19:27:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:33,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:33,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:33,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:33,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:27:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:27:33,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:33,528 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 19:27:33,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:33,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721065913] [2021-10-21 19:27:33,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:33,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748245066] [2021-10-21 19:27:33,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748245066] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:33,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:33,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:27:33,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306451972] [2021-10-21 19:27:33,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:27:33,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:33,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:27:33,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:33,533 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:33,611 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-10-21 19:27:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:27:33,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-21 19:27:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:33,618 INFO L225 Difference]: With dead ends: 67 [2021-10-21 19:27:33,619 INFO L226 Difference]: Without dead ends: 65 [2021-10-21 19:27:33,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-21 19:27:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2021-10-21 19:27:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 54 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 19:27:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-10-21 19:27:33,640 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2021-10-21 19:27:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:33,640 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-10-21 19:27:33,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:33,641 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-10-21 19:27:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:27:33,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:33,643 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:33,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:33,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:33,857 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:33,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:33,858 INFO L82 PathProgramCache]: Analyzing trace with hash 29719088, now seen corresponding path program 1 times [2021-10-21 19:27:33,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:33,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960069999] [2021-10-21 19:27:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:33,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:33,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:33,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52023536] [2021-10-21 19:27:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:33,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:33,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:33,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:33,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:27:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:34,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:27:34,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:34,228 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 19:27:34,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:34,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960069999] [2021-10-21 19:27:34,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:34,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52023536] [2021-10-21 19:27:34,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52023536] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:34,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:34,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:27:34,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126678919] [2021-10-21 19:27:34,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:27:34,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:34,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:27:34,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:34,232 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:34,338 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-10-21 19:27:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:27:34,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-21 19:27:34,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:34,342 INFO L225 Difference]: With dead ends: 108 [2021-10-21 19:27:34,343 INFO L226 Difference]: Without dead ends: 106 [2021-10-21 19:27:34,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:27:34,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-21 19:27:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-10-21 19:27:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 77 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 19:27:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2021-10-21 19:27:34,361 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 26 [2021-10-21 19:27:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:34,362 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2021-10-21 19:27:34,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2021-10-21 19:27:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:27:34,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:34,367 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:34,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:34,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:34,585 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:34,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:34,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1666886870, now seen corresponding path program 1 times [2021-10-21 19:27:34,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:34,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479124139] [2021-10-21 19:27:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:34,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:34,612 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:34,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925796398] [2021-10-21 19:27:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:34,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:34,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:34,626 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:34,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:27:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:34,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:27:34,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:34,942 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 19:27:34,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:34,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479124139] [2021-10-21 19:27:34,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:34,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925796398] [2021-10-21 19:27:34,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925796398] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:34,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:34,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:27:34,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701782572] [2021-10-21 19:27:34,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:27:34,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:34,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:27:34,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:27:34,946 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:34,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:34,979 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2021-10-21 19:27:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:27:34,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-21 19:27:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:34,981 INFO L225 Difference]: With dead ends: 89 [2021-10-21 19:27:34,981 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 19:27:34,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:27:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 19:27:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-21 19:27:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 19:27:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2021-10-21 19:27:34,992 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 28 [2021-10-21 19:27:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:34,992 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2021-10-21 19:27:34,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2021-10-21 19:27:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:27:34,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:34,994 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:35,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:35,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:27:35,209 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:35,210 INFO L82 PathProgramCache]: Analyzing trace with hash -134066994, now seen corresponding path program 1 times [2021-10-21 19:27:35,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:35,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033123053] [2021-10-21 19:27:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:35,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:35,229 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:35,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864651916] [2021-10-21 19:27:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:35,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:35,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:35,236 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:35,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:27:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:35,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:27:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:35,575 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 19:27:35,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:35,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033123053] [2021-10-21 19:27:35,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:35,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864651916] [2021-10-21 19:27:35,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864651916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:35,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:35,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:27:35,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733385220] [2021-10-21 19:27:35,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:27:35,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:35,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:27:35,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:27:35,578 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:35,764 INFO L93 Difference]: Finished difference Result 232 states and 266 transitions. [2021-10-21 19:27:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:27:35,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-21 19:27:35,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:35,767 INFO L225 Difference]: With dead ends: 232 [2021-10-21 19:27:35,767 INFO L226 Difference]: Without dead ends: 224 [2021-10-21 19:27:35,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:27:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-21 19:27:35,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 136. [2021-10-21 19:27:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.353846153846154) internal successors, (176), 135 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 19:27:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2021-10-21 19:27:35,787 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 29 [2021-10-21 19:27:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:35,789 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2021-10-21 19:27:35,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:35,789 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2021-10-21 19:27:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:27:35,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:35,792 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:35,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:36,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-21 19:27:36,005 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:36,006 INFO L82 PathProgramCache]: Analyzing trace with hash 966792015, now seen corresponding path program 1 times [2021-10-21 19:27:36,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:36,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141737916] [2021-10-21 19:27:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:36,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:36,018 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:36,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430835843] [2021-10-21 19:27:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:36,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:36,033 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:36,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:27:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:36,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:27:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:36,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:36,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141737916] [2021-10-21 19:27:36,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:36,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430835843] [2021-10-21 19:27:36,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430835843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:36,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:36,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:27:36,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068242518] [2021-10-21 19:27:36,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:27:36,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:36,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:27:36,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:27:36,364 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:36,410 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2021-10-21 19:27:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:27:36,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-21 19:27:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:36,412 INFO L225 Difference]: With dead ends: 179 [2021-10-21 19:27:36,412 INFO L226 Difference]: Without dead ends: 136 [2021-10-21 19:27:36,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:27:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-21 19:27:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-10-21 19:27:36,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.3461538461538463) internal successors, (175), 135 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 19:27:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2021-10-21 19:27:36,433 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 30 [2021-10-21 19:27:36,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:36,434 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2021-10-21 19:27:36,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2021-10-21 19:27:36,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:27:36,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:36,438 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:36,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:36,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:27:36,653 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash 302394158, now seen corresponding path program 1 times [2021-10-21 19:27:36,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:36,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513186484] [2021-10-21 19:27:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:36,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:36,668 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:36,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30341999] [2021-10-21 19:27:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:36,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:36,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:36,670 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:36,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:27:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:27:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:37,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:37,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513186484] [2021-10-21 19:27:37,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:37,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30341999] [2021-10-21 19:27:37,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30341999] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:37,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:37,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:27:37,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158432722] [2021-10-21 19:27:37,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:27:37,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:37,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:27:37,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:27:37,306 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 19:27:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:37,590 INFO L93 Difference]: Finished difference Result 173 states and 219 transitions. [2021-10-21 19:27:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:27:37,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-21 19:27:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:37,593 INFO L225 Difference]: With dead ends: 173 [2021-10-21 19:27:37,593 INFO L226 Difference]: Without dead ends: 171 [2021-10-21 19:27:37,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:27:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-21 19:27:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2021-10-21 19:27:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.3571428571428572) internal successors, (209), 159 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 19:27:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 209 transitions. [2021-10-21 19:27:37,613 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 209 transitions. Word has length 32 [2021-10-21 19:27:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:37,613 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 209 transitions. [2021-10-21 19:27:37,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 19:27:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 209 transitions. [2021-10-21 19:27:37,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:27:37,615 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:37,615 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:37,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:37,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:37,829 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:37,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2001825622, now seen corresponding path program 1 times [2021-10-21 19:27:37,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:37,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27716455] [2021-10-21 19:27:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:37,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:37,841 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:37,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023759106] [2021-10-21 19:27:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:37,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:37,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:37,843 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:37,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:27:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:38,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:27:38,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:38,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:38,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27716455] [2021-10-21 19:27:38,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:38,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023759106] [2021-10-21 19:27:38,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023759106] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:38,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:38,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:27:38,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165168978] [2021-10-21 19:27:38,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:27:38,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:38,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:27:38,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:27:38,204 INFO L87 Difference]: Start difference. First operand 160 states and 209 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:38,256 INFO L93 Difference]: Finished difference Result 269 states and 355 transitions. [2021-10-21 19:27:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:27:38,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-21 19:27:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:38,259 INFO L225 Difference]: With dead ends: 269 [2021-10-21 19:27:38,259 INFO L226 Difference]: Without dead ends: 171 [2021-10-21 19:27:38,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:27:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-21 19:27:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-10-21 19:27:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.3374233128834356) internal successors, (218), 168 states have internal predecessors, (218), 0 states have call successors, (0), 0 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 19:27:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 218 transitions. [2021-10-21 19:27:38,279 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 218 transitions. Word has length 34 [2021-10-21 19:27:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:38,280 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 218 transitions. [2021-10-21 19:27:38,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 218 transitions. [2021-10-21 19:27:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:27:38,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:38,281 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:38,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:38,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:27:38,496 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:38,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1456833039, now seen corresponding path program 1 times [2021-10-21 19:27:38,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:38,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802375753] [2021-10-21 19:27:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:38,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:38,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:38,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85474380] [2021-10-21 19:27:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:38,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:38,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:38,509 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:38,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:27:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:38,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 19:27:38,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:39,558 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 19:27:39,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:39,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802375753] [2021-10-21 19:27:39,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:39,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85474380] [2021-10-21 19:27:39,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85474380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:39,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:39,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:27:39,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156133287] [2021-10-21 19:27:39,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:27:39,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:27:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:27:39,561 INFO L87 Difference]: Start difference. First operand 169 states and 218 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:39,823 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2021-10-21 19:27:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:27:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-21 19:27:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:39,825 INFO L225 Difference]: With dead ends: 180 [2021-10-21 19:27:39,825 INFO L226 Difference]: Without dead ends: 178 [2021-10-21 19:27:39,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:27:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-21 19:27:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 169. [2021-10-21 19:27:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.3251533742331287) internal successors, (216), 168 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 19:27:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 216 transitions. [2021-10-21 19:27:39,842 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 216 transitions. Word has length 34 [2021-10-21 19:27:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:39,842 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 216 transitions. [2021-10-21 19:27:39,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:39,843 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 216 transitions. [2021-10-21 19:27:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:27:39,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:39,843 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:39,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:40,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:27:40,051 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:40,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:40,051 INFO L82 PathProgramCache]: Analyzing trace with hash 142945620, now seen corresponding path program 1 times [2021-10-21 19:27:40,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:40,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169919438] [2021-10-21 19:27:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:40,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:40,062 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:40,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085110571] [2021-10-21 19:27:40,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:40,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:40,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:40,064 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:40,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:27:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:40,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-21 19:27:40,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:42,077 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 19:27:42,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:42,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169919438] [2021-10-21 19:27:42,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:42,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085110571] [2021-10-21 19:27:42,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085110571] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:42,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:42,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:27:42,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043605347] [2021-10-21 19:27:42,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:27:42,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:27:42,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:27:42,081 INFO L87 Difference]: Start difference. First operand 169 states and 216 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:43,027 INFO L93 Difference]: Finished difference Result 197 states and 248 transitions. [2021-10-21 19:27:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:27:43,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-21 19:27:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:43,030 INFO L225 Difference]: With dead ends: 197 [2021-10-21 19:27:43,030 INFO L226 Difference]: Without dead ends: 195 [2021-10-21 19:27:43,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 779.7ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:27:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-10-21 19:27:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 169. [2021-10-21 19:27:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.312883435582822) internal successors, (214), 168 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 214 transitions. [2021-10-21 19:27:43,062 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 214 transitions. Word has length 36 [2021-10-21 19:27:43,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:43,062 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 214 transitions. [2021-10-21 19:27:43,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 214 transitions. [2021-10-21 19:27:43,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:27:43,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:43,063 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:43,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:43,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:27:43,277 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:43,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:43,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1084150885, now seen corresponding path program 2 times [2021-10-21 19:27:43,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:43,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906002163] [2021-10-21 19:27:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:43,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:43,302 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:43,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145131375] [2021-10-21 19:27:43,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:27:43,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:43,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:43,329 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:43,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:27:43,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:27:43,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:27:43,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-21 19:27:43,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:44,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:44,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906002163] [2021-10-21 19:27:44,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:44,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145131375] [2021-10-21 19:27:44,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145131375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:44,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:44,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:27:44,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079593001] [2021-10-21 19:27:44,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:27:44,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:27:44,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:27:44,220 INFO L87 Difference]: Start difference. First operand 169 states and 214 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:44,523 INFO L93 Difference]: Finished difference Result 184 states and 229 transitions. [2021-10-21 19:27:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:27:44,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-21 19:27:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:44,526 INFO L225 Difference]: With dead ends: 184 [2021-10-21 19:27:44,526 INFO L226 Difference]: Without dead ends: 182 [2021-10-21 19:27:44,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:27:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-21 19:27:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 170. [2021-10-21 19:27:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.3109756097560976) internal successors, (215), 169 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 19:27:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 215 transitions. [2021-10-21 19:27:44,548 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 215 transitions. Word has length 36 [2021-10-21 19:27:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:44,548 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 215 transitions. [2021-10-21 19:27:44,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 215 transitions. [2021-10-21 19:27:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:27:44,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:44,550 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:44,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:44,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:27:44,777 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:44,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1970211809, now seen corresponding path program 1 times [2021-10-21 19:27:44,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:44,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005769118] [2021-10-21 19:27:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:44,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:44,789 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:44,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549625733] [2021-10-21 19:27:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:44,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:44,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:44,791 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:44,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:27:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:27:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:45,299 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 19:27:45,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:45,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005769118] [2021-10-21 19:27:45,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:45,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549625733] [2021-10-21 19:27:45,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549625733] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:45,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:45,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:27:45,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992013249] [2021-10-21 19:27:45,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:27:45,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:45,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:27:45,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:27:45,303 INFO L87 Difference]: Start difference. First operand 170 states and 215 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:45,374 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2021-10-21 19:27:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:27:45,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-21 19:27:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:45,376 INFO L225 Difference]: With dead ends: 181 [2021-10-21 19:27:45,377 INFO L226 Difference]: Without dead ends: 173 [2021-10-21 19:27:45,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:27:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-21 19:27:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-10-21 19:27:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 167 states have (on average 1.3053892215568863) internal successors, (218), 172 states have internal predecessors, (218), 0 states have call successors, (0), 0 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 19:27:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 218 transitions. [2021-10-21 19:27:45,396 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 218 transitions. Word has length 38 [2021-10-21 19:27:45,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:45,396 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 218 transitions. [2021-10-21 19:27:45,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 218 transitions. [2021-10-21 19:27:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:27:45,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:45,398 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:45,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:45,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:45,617 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash -947205511, now seen corresponding path program 1 times [2021-10-21 19:27:45,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:45,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710254724] [2021-10-21 19:27:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:45,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:45,628 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:45,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978082633] [2021-10-21 19:27:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:45,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:45,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:45,630 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:45,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:27:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-21 19:27:46,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:47,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:47,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710254724] [2021-10-21 19:27:47,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:47,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978082633] [2021-10-21 19:27:47,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978082633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:47,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:47,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:27:47,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246987051] [2021-10-21 19:27:47,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:27:47,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:47,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:27:47,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:27:47,207 INFO L87 Difference]: Start difference. First operand 173 states and 218 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 19:27:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:47,714 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2021-10-21 19:27:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:27:47,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-21 19:27:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:47,716 INFO L225 Difference]: With dead ends: 217 [2021-10-21 19:27:47,717 INFO L226 Difference]: Without dead ends: 213 [2021-10-21 19:27:47,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:27:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-21 19:27:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 199. [2021-10-21 19:27:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.3212435233160622) internal successors, (255), 198 states have internal predecessors, (255), 0 states have call successors, (0), 0 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 19:27:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 255 transitions. [2021-10-21 19:27:47,740 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 255 transitions. Word has length 39 [2021-10-21 19:27:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:47,740 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 255 transitions. [2021-10-21 19:27:47,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 19:27:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 255 transitions. [2021-10-21 19:27:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-21 19:27:47,742 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:47,742 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:47,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:47,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:47,957 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash 268729372, now seen corresponding path program 1 times [2021-10-21 19:27:47,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:47,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762651749] [2021-10-21 19:27:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:47,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:47,969 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:47,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162371378] [2021-10-21 19:27:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:47,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:47,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:47,971 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:47,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:27:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:48,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:27:48,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:27:48,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:48,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762651749] [2021-10-21 19:27:48,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:48,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162371378] [2021-10-21 19:27:48,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162371378] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:48,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:48,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:27:48,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654893597] [2021-10-21 19:27:48,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:27:48,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:27:48,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:27:48,743 INFO L87 Difference]: Start difference. First operand 199 states and 255 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:48,889 INFO L93 Difference]: Finished difference Result 247 states and 311 transitions. [2021-10-21 19:27:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:27:48,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-21 19:27:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:48,893 INFO L225 Difference]: With dead ends: 247 [2021-10-21 19:27:48,893 INFO L226 Difference]: Without dead ends: 239 [2021-10-21 19:27:48,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:27:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-10-21 19:27:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 226. [2021-10-21 19:27:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.3227272727272728) internal successors, (291), 225 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 19:27:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 291 transitions. [2021-10-21 19:27:48,915 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 291 transitions. Word has length 41 [2021-10-21 19:27:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:48,916 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 291 transitions. [2021-10-21 19:27:48,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:48,916 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 291 transitions. [2021-10-21 19:27:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-21 19:27:48,917 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:48,917 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:48,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:49,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:49,137 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:49,138 INFO L82 PathProgramCache]: Analyzing trace with hash 170255994, now seen corresponding path program 2 times [2021-10-21 19:27:49,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:49,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933350266] [2021-10-21 19:27:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:49,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:49,147 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:49,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990393142] [2021-10-21 19:27:49,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:27:49,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:49,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:49,155 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:49,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:27:49,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:27:49,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:27:49,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:27:49,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:49,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:49,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933350266] [2021-10-21 19:27:49,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:49,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990393142] [2021-10-21 19:27:49,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990393142] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:49,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:49,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:27:49,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598951570] [2021-10-21 19:27:49,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:27:49,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:27:49,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:27:49,768 INFO L87 Difference]: Start difference. First operand 226 states and 291 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:49,821 INFO L93 Difference]: Finished difference Result 250 states and 317 transitions. [2021-10-21 19:27:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:27:49,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-21 19:27:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:49,828 INFO L225 Difference]: With dead ends: 250 [2021-10-21 19:27:49,828 INFO L226 Difference]: Without dead ends: 240 [2021-10-21 19:27:49,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:27:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-10-21 19:27:49,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-10-21 19:27:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 233 states have (on average 1.3090128755364807) internal successors, (305), 238 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 19:27:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 305 transitions. [2021-10-21 19:27:49,854 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 305 transitions. Word has length 42 [2021-10-21 19:27:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:49,855 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 305 transitions. [2021-10-21 19:27:49,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 305 transitions. [2021-10-21 19:27:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 19:27:49,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:49,856 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:49,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:50,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:50,075 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:50,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1229525663, now seen corresponding path program 1 times [2021-10-21 19:27:50,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:50,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525471125] [2021-10-21 19:27:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:50,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:50,097 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:50,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227232266] [2021-10-21 19:27:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:50,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:50,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:50,099 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:50,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:27:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:27:50,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:50,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:50,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525471125] [2021-10-21 19:27:50,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:50,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227232266] [2021-10-21 19:27:50,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227232266] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:50,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:50,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:27:50,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288735156] [2021-10-21 19:27:50,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:27:50,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:50,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:27:50,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:27:50,715 INFO L87 Difference]: Start difference. First operand 239 states and 305 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:50,809 INFO L93 Difference]: Finished difference Result 368 states and 482 transitions. [2021-10-21 19:27:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:27:50,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-21 19:27:50,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:50,814 INFO L225 Difference]: With dead ends: 368 [2021-10-21 19:27:50,814 INFO L226 Difference]: Without dead ends: 241 [2021-10-21 19:27:50,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:27:50,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-10-21 19:27:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-10-21 19:27:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 235 states have (on average 1.297872340425532) internal successors, (305), 240 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 19:27:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 305 transitions. [2021-10-21 19:27:50,843 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 305 transitions. Word has length 44 [2021-10-21 19:27:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:50,843 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 305 transitions. [2021-10-21 19:27:50,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 305 transitions. [2021-10-21 19:27:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:27:50,845 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:50,845 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:50,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-21 19:27:51,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:51,065 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:51,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:51,066 INFO L82 PathProgramCache]: Analyzing trace with hash -613640578, now seen corresponding path program 2 times [2021-10-21 19:27:51,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:51,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384704215] [2021-10-21 19:27:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:51,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:51,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:51,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357307984] [2021-10-21 19:27:51,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:27:51,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:51,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:51,097 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:51,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:27:51,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:27:51,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:27:51,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:27:51,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:51,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:51,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384704215] [2021-10-21 19:27:51,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:51,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357307984] [2021-10-21 19:27:51,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357307984] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:51,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:51,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:27:51,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860116285] [2021-10-21 19:27:51,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:27:51,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:51,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:27:51,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:51,711 INFO L87 Difference]: Start difference. First operand 241 states and 305 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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 19:27:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:51,796 INFO L93 Difference]: Finished difference Result 465 states and 602 transitions. [2021-10-21 19:27:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:27:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-21 19:27:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:51,799 INFO L225 Difference]: With dead ends: 465 [2021-10-21 19:27:51,800 INFO L226 Difference]: Without dead ends: 364 [2021-10-21 19:27:51,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:27:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-10-21 19:27:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 286. [2021-10-21 19:27:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.3107142857142857) internal successors, (367), 285 states have internal predecessors, (367), 0 states have call successors, (0), 0 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 19:27:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2021-10-21 19:27:51,860 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 46 [2021-10-21 19:27:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:51,860 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2021-10-21 19:27:51,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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 19:27:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2021-10-21 19:27:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:27:51,862 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:51,862 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:51,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:52,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:27:52,077 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:52,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:52,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2041640631, now seen corresponding path program 1 times [2021-10-21 19:27:52,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:52,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590271287] [2021-10-21 19:27:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:52,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:52,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:52,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026324798] [2021-10-21 19:27:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:52,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:52,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:52,098 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:52,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:27:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:52,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-21 19:27:52,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:54,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:54,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590271287] [2021-10-21 19:27:54,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:54,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026324798] [2021-10-21 19:27:54,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026324798] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:54,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:54,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:27:54,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128826107] [2021-10-21 19:27:54,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:27:54,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:54,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:27:54,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:27:54,197 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 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 19:27:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:54,645 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2021-10-21 19:27:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:27:54,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-21 19:27:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:54,648 INFO L225 Difference]: With dead ends: 306 [2021-10-21 19:27:54,649 INFO L226 Difference]: Without dead ends: 304 [2021-10-21 19:27:54,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:27:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-10-21 19:27:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 286. [2021-10-21 19:27:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.3035714285714286) internal successors, (365), 285 states have internal predecessors, (365), 0 states have call successors, (0), 0 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 19:27:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 365 transitions. [2021-10-21 19:27:54,686 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 365 transitions. Word has length 46 [2021-10-21 19:27:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:54,686 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 365 transitions. [2021-10-21 19:27:54,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 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 19:27:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 365 transitions. [2021-10-21 19:27:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:27:54,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:54,687 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:54,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-21 19:27:54,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:27:54,893 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:54,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1100435366, now seen corresponding path program 3 times [2021-10-21 19:27:54,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:54,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117557784] [2021-10-21 19:27:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:54,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:54,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:54,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058483146] [2021-10-21 19:27:54,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:27:54,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:54,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:54,904 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:54,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:27:55,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:27:55,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:27:55,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 19:27:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 19:27:55,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:55,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117557784] [2021-10-21 19:27:55,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:55,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058483146] [2021-10-21 19:27:55,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058483146] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:55,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:55,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:27:55,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202491979] [2021-10-21 19:27:55,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:27:55,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:55,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:27:55,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:55,723 INFO L87 Difference]: Start difference. First operand 286 states and 365 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:55,850 INFO L93 Difference]: Finished difference Result 286 states and 365 transitions. [2021-10-21 19:27:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:27:55,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-21 19:27:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:55,853 INFO L225 Difference]: With dead ends: 286 [2021-10-21 19:27:55,853 INFO L226 Difference]: Without dead ends: 284 [2021-10-21 19:27:55,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:27:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-10-21 19:27:55,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 241. [2021-10-21 19:27:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.2584745762711864) internal successors, (297), 240 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 19:27:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 297 transitions. [2021-10-21 19:27:55,910 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 297 transitions. Word has length 46 [2021-10-21 19:27:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:55,911 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 297 transitions. [2021-10-21 19:27:55,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:27:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 297 transitions. [2021-10-21 19:27:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:27:55,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:55,912 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:55,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:56,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:56,137 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:27:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:56,138 INFO L82 PathProgramCache]: Analyzing trace with hash -316772764, now seen corresponding path program 2 times [2021-10-21 19:27:56,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:56,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485001905] [2021-10-21 19:27:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:56,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:56,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:27:56,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505616977] [2021-10-21 19:27:56,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:27:56,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:56,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:56,163 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:56,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:27:56,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:27:56,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:27:56,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-21 19:27:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:58,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:58,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485001905] [2021-10-21 19:27:58,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:27:58,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505616977] [2021-10-21 19:27:58,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505616977] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:58,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:58,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-21 19:27:58,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427464657] [2021-10-21 19:27:58,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:27:58,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:58,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:27:58,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:27:58,500 INFO L87 Difference]: Start difference. First operand 241 states and 297 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 19:27:59,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:59,816 INFO L93 Difference]: Finished difference Result 272 states and 333 transitions. [2021-10-21 19:27:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:27:59,817 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 19:27:59,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:59,819 INFO L225 Difference]: With dead ends: 272 [2021-10-21 19:27:59,819 INFO L226 Difference]: Without dead ends: 266 [2021-10-21 19:27:59,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 689.7ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:27:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-21 19:27:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2021-10-21 19:27:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.2568093385214008) internal successors, (323), 261 states have internal predecessors, (323), 0 states have call successors, (0), 0 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 19:27:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 323 transitions. [2021-10-21 19:27:59,858 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 323 transitions. Word has length 49 [2021-10-21 19:27:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:59,859 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 323 transitions. [2021-10-21 19:27:59,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 19:27:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 323 transitions. [2021-10-21 19:27:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-21 19:27:59,860 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:59,861 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:59,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-21 19:28:00,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:00,070 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:28:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:00,070 INFO L82 PathProgramCache]: Analyzing trace with hash -231890065, now seen corresponding path program 2 times [2021-10-21 19:28:00,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:00,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318845785] [2021-10-21 19:28:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:00,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:00,109 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:00,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862422540] [2021-10-21 19:28:00,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:28:00,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:00,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:00,113 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:00,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:28:00,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:28:00,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:00,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:28:00,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:01,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:01,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318845785] [2021-10-21 19:28:01,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:28:01,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862422540] [2021-10-21 19:28:01,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862422540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:01,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:01,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:28:01,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431289778] [2021-10-21 19:28:01,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:28:01,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:01,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:28:01,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:28:01,133 INFO L87 Difference]: Start difference. First operand 262 states and 323 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 19:28:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:01,238 INFO L93 Difference]: Finished difference Result 297 states and 361 transitions. [2021-10-21 19:28:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:28:01,239 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-21 19:28:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:01,241 INFO L225 Difference]: With dead ends: 297 [2021-10-21 19:28:01,241 INFO L226 Difference]: Without dead ends: 287 [2021-10-21 19:28:01,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:28:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-21 19:28:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2021-10-21 19:28:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.2437275985663083) internal successors, (347), 283 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 19:28:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 347 transitions. [2021-10-21 19:28:01,296 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 347 transitions. Word has length 52 [2021-10-21 19:28:01,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:01,297 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 347 transitions. [2021-10-21 19:28:01,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 19:28:01,298 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 347 transitions. [2021-10-21 19:28:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 19:28:01,304 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:01,305 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:01,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:01,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:01,521 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:28:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:01,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1401161001, now seen corresponding path program 3 times [2021-10-21 19:28:01,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:01,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006737166] [2021-10-21 19:28:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:01,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:01,541 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:28:01,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462204576] [2021-10-21 19:28:01,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:28:01,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:01,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:01,543 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:01,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:28:37,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:28:37,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:37,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-21 19:28:37,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:29:38,409 WARN L207 SmtUtils]: Spent 26.13 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-21 19:30:13,422 WARN L207 SmtUtils]: Spent 16.25 s on a formula simplification that was a NOOP. DAG size: 4 [2021-10-21 19:30:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 19:30:23,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:30:23,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006737166] [2021-10-21 19:30:23,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:30:23,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462204576] [2021-10-21 19:30:23,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462204576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:30:23,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:30:23,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-21 19:30:23,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871365952] [2021-10-21 19:30:23,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:30:23,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:30:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:30:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=328, Unknown=3, NotChecked=0, Total=420 [2021-10-21 19:30:23,591 INFO L87 Difference]: Start difference. First operand 284 states and 347 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:30:37,906 WARN L207 SmtUtils]: Spent 5.15 s on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-10-21 19:31:16,036 WARN L207 SmtUtils]: Spent 37.82 s on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-10-21 19:31:27,131 WARN L207 SmtUtils]: Spent 5.07 s on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-10-21 19:31:32,934 WARN L207 SmtUtils]: Spent 5.33 s on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2021-10-21 19:31:59,032 WARN L207 SmtUtils]: Spent 22.24 s on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-10-21 19:32:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:32:19,957 INFO L93 Difference]: Finished difference Result 350 states and 424 transitions. [2021-10-21 19:32:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 19:32:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-10-21 19:32:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:32:19,967 INFO L225 Difference]: With dead ends: 350 [2021-10-21 19:32:19,968 INFO L226 Difference]: Without dead ends: 340 [2021-10-21 19:32:19,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 151105.0ms TimeCoverageRelationStatistics Valid=418, Invalid=1139, Unknown=3, NotChecked=0, Total=1560 [2021-10-21 19:32:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-10-21 19:32:20,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 253. [2021-10-21 19:32:20,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 249 states have (on average 1.216867469879518) internal successors, (303), 252 states have internal predecessors, (303), 0 states have call successors, (0), 0 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 19:32:20,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 303 transitions. [2021-10-21 19:32:20,005 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 303 transitions. Word has length 53 [2021-10-21 19:32:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:32:20,005 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 303 transitions. [2021-10-21 19:32:20,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:32:20,005 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 303 transitions. [2021-10-21 19:32:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-21 19:32:20,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:32:20,006 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:32:20,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 19:32:20,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:32:20,216 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:32:20,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:32:20,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1314219604, now seen corresponding path program 2 times [2021-10-21 19:32:20,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:32:20,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773759643] [2021-10-21 19:32:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:32:20,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:32:20,237 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:32:20,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079998913] [2021-10-21 19:32:20,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:32:20,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:32:20,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:32:20,244 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:32:20,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 19:32:21,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:32:21,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:32:21,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:32:21,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:32:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:32:21,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:32:21,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773759643] [2021-10-21 19:32:21,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:32:21,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079998913] [2021-10-21 19:32:21,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079998913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:32:21,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:32:21,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:32:21,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393093921] [2021-10-21 19:32:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:32:21,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:32:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:32:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:32:21,344 INFO L87 Difference]: Start difference. First operand 253 states and 303 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:32:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:32:21,442 INFO L93 Difference]: Finished difference Result 419 states and 514 transitions. [2021-10-21 19:32:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:32:21,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-21 19:32:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:32:21,445 INFO L225 Difference]: With dead ends: 419 [2021-10-21 19:32:21,445 INFO L226 Difference]: Without dead ends: 273 [2021-10-21 19:32:21,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:32:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-10-21 19:32:21,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-10-21 19:32:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 269 states have (on average 1.2007434944237918) internal successors, (323), 272 states have internal predecessors, (323), 0 states have call successors, (0), 0 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 19:32:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 323 transitions. [2021-10-21 19:32:21,510 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 323 transitions. Word has length 54 [2021-10-21 19:32:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:32:21,511 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 323 transitions. [2021-10-21 19:32:21,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:32:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 323 transitions. [2021-10-21 19:32:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:32:21,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:32:21,512 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:32:21,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 19:32:21,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:32:21,737 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:32:21,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:32:21,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2103850292, now seen corresponding path program 2 times [2021-10-21 19:32:21,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:32:21,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914756593] [2021-10-21 19:32:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:32:21,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:32:21,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:32:21,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955518049] [2021-10-21 19:32:21,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:32:21,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:32:21,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:32:21,754 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:32:21,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 19:32:22,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:32:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:32:22,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:32:22,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:32:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:32:22,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:32:22,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914756593] [2021-10-21 19:32:22,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:32:22,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955518049] [2021-10-21 19:32:22,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955518049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:32:22,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:32:22,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:32:22,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317718317] [2021-10-21 19:32:22,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:32:22,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:32:22,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:32:22,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:32:22,759 INFO L87 Difference]: Start difference. First operand 273 states and 323 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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 19:32:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:32:23,074 INFO L93 Difference]: Finished difference Result 482 states and 565 transitions. [2021-10-21 19:32:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:32:23,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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 19:32:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:32:23,077 INFO L225 Difference]: With dead ends: 482 [2021-10-21 19:32:23,078 INFO L226 Difference]: Without dead ends: 472 [2021-10-21 19:32:23,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:32:23,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-10-21 19:32:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 315. [2021-10-21 19:32:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.2057877813504823) internal successors, (375), 314 states have internal predecessors, (375), 0 states have call successors, (0), 0 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 19:32:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 375 transitions. [2021-10-21 19:32:23,127 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 375 transitions. Word has length 55 [2021-10-21 19:32:23,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:32:23,128 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 375 transitions. [2021-10-21 19:32:23,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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 19:32:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 375 transitions. [2021-10-21 19:32:23,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:32:23,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:32:23,129 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:32:23,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-21 19:32:23,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:32:23,337 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:32:23,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:32:23,338 INFO L82 PathProgramCache]: Analyzing trace with hash -827141901, now seen corresponding path program 1 times [2021-10-21 19:32:23,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:32:23,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887642357] [2021-10-21 19:32:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:32:23,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:32:23,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:32:23,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697814423] [2021-10-21 19:32:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:32:23,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:32:23,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:32:23,352 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:32:23,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 19:32:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:32:24,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:32:24,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:32:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:32:24,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:32:24,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887642357] [2021-10-21 19:32:24,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:32:24,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697814423] [2021-10-21 19:32:24,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697814423] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:32:24,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:32:24,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:32:24,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922811224] [2021-10-21 19:32:24,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:32:24,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:32:24,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:32:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:32:24,373 INFO L87 Difference]: Start difference. First operand 315 states and 375 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 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 19:32:24,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:32:24,658 INFO L93 Difference]: Finished difference Result 361 states and 424 transitions. [2021-10-21 19:32:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:32:24,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-10-21 19:32:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:32:24,660 INFO L225 Difference]: With dead ends: 361 [2021-10-21 19:32:24,661 INFO L226 Difference]: Without dead ends: 353 [2021-10-21 19:32:24,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:32:24,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-10-21 19:32:24,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 263. [2021-10-21 19:32:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.1737451737451738) internal successors, (304), 262 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:32:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 304 transitions. [2021-10-21 19:32:24,708 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 304 transitions. Word has length 56 [2021-10-21 19:32:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:32:24,708 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 304 transitions. [2021-10-21 19:32:24,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 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 19:32:24,709 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 304 transitions. [2021-10-21 19:32:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 19:32:24,710 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:32:24,710 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:32:24,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:32:24,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:32:24,925 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:32:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:32:24,925 INFO L82 PathProgramCache]: Analyzing trace with hash -859252433, now seen corresponding path program 3 times [2021-10-21 19:32:24,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:32:24,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260471096] [2021-10-21 19:32:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:32:24,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:32:24,934 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:32:24,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131076942] [2021-10-21 19:32:24,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:32:24,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:32:24,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:32:24,941 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:32:24,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 19:32:25,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:32:25,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:32:25,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:32:25,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:32:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:32:26,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:32:26,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260471096] [2021-10-21 19:32:26,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:32:26,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131076942] [2021-10-21 19:32:26,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131076942] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:32:26,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:32:26,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:32:26,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361939416] [2021-10-21 19:32:26,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:32:26,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:32:26,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:32:26,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:32:26,131 INFO L87 Difference]: Start difference. First operand 263 states and 304 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 19:32:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:32:26,281 INFO L93 Difference]: Finished difference Result 468 states and 553 transitions. [2021-10-21 19:32:26,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:32:26,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-10-21 19:32:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:32:26,283 INFO L225 Difference]: With dead ends: 468 [2021-10-21 19:32:26,283 INFO L226 Difference]: Without dead ends: 313 [2021-10-21 19:32:26,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:32:26,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-10-21 19:32:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 301. [2021-10-21 19:32:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 297 states have (on average 1.1616161616161615) internal successors, (345), 300 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 19:32:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 345 transitions. [2021-10-21 19:32:26,330 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 345 transitions. Word has length 58 [2021-10-21 19:32:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:32:26,330 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 345 transitions. [2021-10-21 19:32:26,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 19:32:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 345 transitions. [2021-10-21 19:32:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-21 19:32:26,332 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:32:26,332 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:32:26,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 19:32:26,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-21 19:32:26,548 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:32:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:32:26,549 INFO L82 PathProgramCache]: Analyzing trace with hash 798585380, now seen corresponding path program 3 times [2021-10-21 19:32:26,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:32:26,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920739970] [2021-10-21 19:32:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:32:26,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:32:26,565 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:32:26,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928134167] [2021-10-21 19:32:26,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:32:26,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:32:26,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:32:26,567 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:32:26,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 19:32:27,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:32:27,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:32:27,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:32:27,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:32:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:32:27,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:32:27,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920739970] [2021-10-21 19:32:27,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:32:27,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928134167] [2021-10-21 19:32:27,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928134167] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:32:27,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:32:27,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:32:27,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578588956] [2021-10-21 19:32:27,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:32:27,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:32:27,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:32:27,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:32:27,750 INFO L87 Difference]: Start difference. First operand 301 states and 345 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 19:32:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:32:27,881 INFO L93 Difference]: Finished difference Result 314 states and 360 transitions. [2021-10-21 19:32:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:32:27,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-10-21 19:32:27,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:32:27,884 INFO L225 Difference]: With dead ends: 314 [2021-10-21 19:32:27,884 INFO L226 Difference]: Without dead ends: 310 [2021-10-21 19:32:27,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:32:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-21 19:32:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2021-10-21 19:32:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.1568627450980393) internal successors, (354), 309 states have internal predecessors, (354), 0 states have call successors, (0), 0 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 19:32:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 354 transitions. [2021-10-21 19:32:27,931 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 354 transitions. Word has length 62 [2021-10-21 19:32:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:32:27,931 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 354 transitions. [2021-10-21 19:32:27,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 19:32:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 354 transitions. [2021-10-21 19:32:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-21 19:32:27,933 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:32:27,933 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:32:27,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-21 19:32:28,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:32:28,153 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:32:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:32:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1643788516, now seen corresponding path program 4 times [2021-10-21 19:32:28,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:32:28,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585663537] [2021-10-21 19:32:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:32:28,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:32:28,163 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:32:28,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489494332] [2021-10-21 19:32:28,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:32:28,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:32:28,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:32:28,164 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:32:28,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-21 19:33:24,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:33:24,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:33:24,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:33:24,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:24,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:33:24,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585663537] [2021-10-21 19:33:24,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:33:24,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489494332] [2021-10-21 19:33:24,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489494332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:24,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:33:24,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:33:24,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524647686] [2021-10-21 19:33:24,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:33:24,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:33:24,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:33:24,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:33:24,413 INFO L87 Difference]: Start difference. First operand 310 states and 354 transitions. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 19:33:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:33:24,585 INFO L93 Difference]: Finished difference Result 518 states and 607 transitions. [2021-10-21 19:33:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:33:24,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-10-21 19:33:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:33:24,588 INFO L225 Difference]: With dead ends: 518 [2021-10-21 19:33:24,588 INFO L226 Difference]: Without dead ends: 363 [2021-10-21 19:33:24,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:33:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-10-21 19:33:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 335. [2021-10-21 19:33:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 331 states have (on average 1.151057401812689) internal successors, (381), 334 states have internal predecessors, (381), 0 states have call successors, (0), 0 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 19:33:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 381 transitions. [2021-10-21 19:33:24,668 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 381 transitions. Word has length 68 [2021-10-21 19:33:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:33:24,669 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 381 transitions. [2021-10-21 19:33:24,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 19:33:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 381 transitions. [2021-10-21 19:33:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-21 19:33:24,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:33:24,670 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:33:24,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:24,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:24,871 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:33:24,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:24,871 INFO L82 PathProgramCache]: Analyzing trace with hash 818815641, now seen corresponding path program 4 times [2021-10-21 19:33:24,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:24,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664491173] [2021-10-21 19:33:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:24,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:24,896 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:33:24,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801755836] [2021-10-21 19:33:24,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:33:24,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:24,898 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:33:24,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-21 19:33:28,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:33:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:33:28,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:33:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:29,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:33:29,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664491173] [2021-10-21 19:33:29,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:33:29,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801755836] [2021-10-21 19:33:29,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801755836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:29,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:33:29,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:33:29,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474969682] [2021-10-21 19:33:29,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:33:29,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:33:29,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:33:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:33:29,240 INFO L87 Difference]: Start difference. First operand 335 states and 381 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 19:33:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:33:29,383 INFO L93 Difference]: Finished difference Result 348 states and 396 transitions. [2021-10-21 19:33:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:33:29,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-10-21 19:33:29,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:33:29,397 INFO L225 Difference]: With dead ends: 348 [2021-10-21 19:33:29,397 INFO L226 Difference]: Without dead ends: 344 [2021-10-21 19:33:29,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:33:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-10-21 19:33:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-10-21 19:33:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 340 states have (on average 1.1470588235294117) internal successors, (390), 343 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 19:33:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 390 transitions. [2021-10-21 19:33:29,455 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 390 transitions. Word has length 72 [2021-10-21 19:33:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:33:29,455 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 390 transitions. [2021-10-21 19:33:29,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 19:33:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 390 transitions. [2021-10-21 19:33:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-21 19:33:29,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:33:29,457 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:33:29,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:29,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:29,667 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:33:29,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:29,668 INFO L82 PathProgramCache]: Analyzing trace with hash -389368652, now seen corresponding path program 5 times [2021-10-21 19:33:29,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:29,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164566880] [2021-10-21 19:33:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:29,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:29,679 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:33:29,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556523167] [2021-10-21 19:33:29,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:33:29,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:29,681 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:33:29,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-21 19:33:31,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 19:33:31,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:33:31,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:33:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:31,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:33:31,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164566880] [2021-10-21 19:33:31,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:33:31,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556523167] [2021-10-21 19:33:31,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556523167] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:31,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:33:31,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:33:31,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573160632] [2021-10-21 19:33:31,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:33:31,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:33:31,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:33:31,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:33:31,449 INFO L87 Difference]: Start difference. First operand 344 states and 390 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 19:33:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:33:31,587 INFO L93 Difference]: Finished difference Result 398 states and 449 transitions. [2021-10-21 19:33:31,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:33:31,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-10-21 19:33:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:33:31,600 INFO L225 Difference]: With dead ends: 398 [2021-10-21 19:33:31,600 INFO L226 Difference]: Without dead ends: 394 [2021-10-21 19:33:31,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:33:31,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-10-21 19:33:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 368. [2021-10-21 19:33:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 364 states have (on average 1.1456043956043955) internal successors, (417), 367 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 19:33:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 417 transitions. [2021-10-21 19:33:31,667 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 417 transitions. Word has length 76 [2021-10-21 19:33:31,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:33:31,668 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 417 transitions. [2021-10-21 19:33:31,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 19:33:31,668 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 417 transitions. [2021-10-21 19:33:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-21 19:33:31,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:33:31,670 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:33:31,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:31,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 19:33:31,897 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:33:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash 301152857, now seen corresponding path program 5 times [2021-10-21 19:33:31,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:31,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616933662] [2021-10-21 19:33:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:31,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:31,913 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:33:31,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173472801] [2021-10-21 19:33:31,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:33:31,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:31,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:31,917 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:33:31,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-21 19:33:33,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 19:33:33,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:33:33,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:33:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 8 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:33,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:33:33,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616933662] [2021-10-21 19:33:33,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:33:33,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173472801] [2021-10-21 19:33:33,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173472801] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:33,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:33:33,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:33:33,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107152590] [2021-10-21 19:33:33,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:33:33,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:33:33,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:33:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:33:33,904 INFO L87 Difference]: Start difference. First operand 368 states and 417 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 19:33:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:33:34,038 INFO L93 Difference]: Finished difference Result 555 states and 646 transitions. [2021-10-21 19:33:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:33:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-10-21 19:33:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:33:34,040 INFO L225 Difference]: With dead ends: 555 [2021-10-21 19:33:34,040 INFO L226 Difference]: Without dead ends: 400 [2021-10-21 19:33:34,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:33:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-10-21 19:33:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 378. [2021-10-21 19:33:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 374 states have (on average 1.13903743315508) internal successors, (426), 377 states have internal predecessors, (426), 0 states have call successors, (0), 0 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 19:33:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 426 transitions. [2021-10-21 19:33:34,110 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 426 transitions. Word has length 78 [2021-10-21 19:33:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:33:34,110 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 426 transitions. [2021-10-21 19:33:34,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 19:33:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 426 transitions. [2021-10-21 19:33:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-21 19:33:34,112 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:33:34,112 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:33:34,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:34,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-21 19:33:34,323 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:33:34,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:34,324 INFO L82 PathProgramCache]: Analyzing trace with hash 631448244, now seen corresponding path program 6 times [2021-10-21 19:33:34,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:34,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905404023] [2021-10-21 19:33:34,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:34,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:34,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:33:34,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206379199] [2021-10-21 19:33:34,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:33:34,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:34,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:34,346 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:33:34,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-21 19:33:35,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-21 19:33:35,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:33:35,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:33:35,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 11 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:35,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:33:35,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905404023] [2021-10-21 19:33:35,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:33:35,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206379199] [2021-10-21 19:33:35,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206379199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:35,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:33:35,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:33:35,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402269376] [2021-10-21 19:33:35,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:33:35,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:33:35,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:33:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:33:35,627 INFO L87 Difference]: Start difference. First operand 378 states and 426 transitions. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 19:33:35,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:33:35,770 INFO L93 Difference]: Finished difference Result 586 states and 679 transitions. [2021-10-21 19:33:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:33:35,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-10-21 19:33:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:33:35,772 INFO L225 Difference]: With dead ends: 586 [2021-10-21 19:33:35,772 INFO L226 Difference]: Without dead ends: 431 [2021-10-21 19:33:35,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:33:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-10-21 19:33:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 403. [2021-10-21 19:33:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 399 states have (on average 1.1353383458646618) internal successors, (453), 402 states have internal predecessors, (453), 0 states have call successors, (0), 0 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 19:33:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 453 transitions. [2021-10-21 19:33:35,847 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 453 transitions. Word has length 82 [2021-10-21 19:33:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:33:35,847 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 453 transitions. [2021-10-21 19:33:35,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 19:33:35,848 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 453 transitions. [2021-10-21 19:33:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-21 19:33:35,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:33:35,849 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:33:35,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:36,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-21 19:33:36,073 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:33:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1753648855, now seen corresponding path program 6 times [2021-10-21 19:33:36,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:36,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336132295] [2021-10-21 19:33:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:36,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:36,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:33:36,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668516064] [2021-10-21 19:33:36,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:33:36,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:36,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:36,086 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:33:36,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-21 19:33:37,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-21 19:33:37,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:33:37,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:33:37,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:33:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:33:37,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:33:37,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336132295] [2021-10-21 19:33:37,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:33:37,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668516064] [2021-10-21 19:33:37,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668516064] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:33:37,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:33:37,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:33:37,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361551061] [2021-10-21 19:33:37,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:33:37,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:33:37,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:33:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:33:37,366 INFO L87 Difference]: Start difference. First operand 403 states and 453 transitions. Second operand has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 19:33:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:33:37,506 INFO L93 Difference]: Finished difference Result 416 states and 468 transitions. [2021-10-21 19:33:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:33:37,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-10-21 19:33:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:33:37,508 INFO L225 Difference]: With dead ends: 416 [2021-10-21 19:33:37,508 INFO L226 Difference]: Without dead ends: 412 [2021-10-21 19:33:37,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:33:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-10-21 19:33:37,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2021-10-21 19:33:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 408 states have (on average 1.1323529411764706) internal successors, (462), 411 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 19:33:37,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 462 transitions. [2021-10-21 19:33:37,579 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 462 transitions. Word has length 86 [2021-10-21 19:33:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:33:37,579 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 462 transitions. [2021-10-21 19:33:37,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 19:33:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 462 transitions. [2021-10-21 19:33:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-21 19:33:37,581 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:33:37,581 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:33:37,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:37,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-21 19:33:37,791 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:33:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:33:37,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2078400471, now seen corresponding path program 7 times [2021-10-21 19:33:37,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:33:37,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53157726] [2021-10-21 19:33:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:33:37,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:33:37,812 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:33:37,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004931729] [2021-10-21 19:33:37,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:33:37,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:33:37,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:33:37,814 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:33:37,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-21 19:33:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:38,928 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:33:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:33:39,085 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:33:39,085 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:33:39,086 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:33:39,088 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:33:39,088 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:33:39,089 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:33:39,089 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:33:39,089 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:33:39,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-21 19:33:39,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 19:33:39,320 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:33:39,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:33:39 BoogieIcfgContainer [2021-10-21 19:33:39,432 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:33:39,433 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:33:39,433 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:33:39,433 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:33:39,434 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:27:28" (3/4) ... [2021-10-21 19:33:39,435 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:33:39,543 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:33:39,543 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:33:39,544 INFO L168 Benchmark]: Toolchain (without parser) took 371756.37 ms. Allocated memory was 81.8 MB in the beginning and 318.8 MB in the end (delta: 237.0 MB). Free memory was 46.0 MB in the beginning and 116.9 MB in the end (delta: -70.9 MB). Peak memory consumption was 164.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:33:39,545 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory was 62.1 MB in the beginning and 62.0 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:33:39,545 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.89 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 45.8 MB in the beginning and 74.4 MB in the end (delta: -28.6 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:33:39,546 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.32 ms. Allocated memory is still 98.6 MB. Free memory was 74.4 MB in the beginning and 72.5 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:33:39,546 INFO L168 Benchmark]: Boogie Preprocessor took 26.12 ms. Allocated memory is still 98.6 MB. Free memory was 72.5 MB in the beginning and 71.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:33:39,547 INFO L168 Benchmark]: RCFGBuilder took 410.18 ms. Allocated memory is still 98.6 MB. Free memory was 71.4 MB in the beginning and 59.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:33:39,547 INFO L168 Benchmark]: TraceAbstraction took 370881.45 ms. Allocated memory was 98.6 MB in the beginning and 318.8 MB in the end (delta: 220.2 MB). Free memory was 59.1 MB in the beginning and 124.2 MB in the end (delta: -65.1 MB). Peak memory consumption was 156.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:33:39,547 INFO L168 Benchmark]: Witness Printer took 110.89 ms. Allocated memory is still 318.8 MB. Free memory was 124.2 MB in the beginning and 116.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:33:39,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory was 62.1 MB in the beginning and 62.0 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 274.89 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 45.8 MB in the beginning and 74.4 MB in the end (delta: -28.6 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.32 ms. Allocated memory is still 98.6 MB. Free memory was 74.4 MB in the beginning and 72.5 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.12 ms. Allocated memory is still 98.6 MB. Free memory was 72.5 MB in the beginning and 71.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 410.18 ms. Allocated memory is still 98.6 MB. Free memory was 71.4 MB in the beginning and 59.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 370881.45 ms. Allocated memory was 98.6 MB in the beginning and 318.8 MB in the end (delta: 220.2 MB). Free memory was 59.1 MB in the beginning and 124.2 MB in the end (delta: -65.1 MB). Peak memory consumption was 156.7 MB. Max. memory is 16.1 GB. * Witness Printer took 110.89 ms. Allocated memory is still 318.8 MB. Free memory was 124.2 MB in the beginning and 116.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 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: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L40] EXPR counter++ VAL [counter=1] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=1] [L46] EXPR counter++ VAL [counter=2] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L51] COND TRUE !(c >= b) VAL [counter=2] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=2] [L40] EXPR counter++ VAL [counter=3] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=3] [L46] EXPR counter++ VAL [counter=4] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [counter=4] [L46] EXPR counter++ VAL [counter=5] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L51] COND TRUE !(c >= b) VAL [counter=5] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=5] [L40] EXPR counter++ VAL [counter=6] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=6] [L46] EXPR counter++ VAL [counter=7] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=7] [L11] COND FALSE !(!(cond)) VAL [counter=7] [L11] COND FALSE !(!(cond)) VAL [counter=7] [L11] COND FALSE !(!(cond)) VAL [counter=7] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [counter=7] [L46] EXPR counter++ VAL [counter=8] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=8] [L11] COND FALSE !(!(cond)) VAL [counter=8] [L11] COND FALSE !(!(cond)) VAL [counter=8] [L11] COND FALSE !(!(cond)) VAL [counter=8] [L51] COND TRUE !(c >= b) VAL [counter=8] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=8] [L40] EXPR counter++ VAL [counter=9] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=9] [L46] EXPR counter++ VAL [counter=10] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=10] [L11] COND FALSE !(!(cond)) VAL [counter=10] [L11] COND FALSE !(!(cond)) VAL [counter=10] [L11] COND FALSE !(!(cond)) VAL [counter=10] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [counter=10] [L46] EXPR counter++ VAL [counter=11] [L46] COND FALSE !(counter++<10) [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=11] [L40] EXPR counter++ VAL [counter=12] [L40] COND FALSE !(counter++<10) [L11] COND TRUE !(cond) VAL [counter=12] [L13] reach_error() VAL [counter=12] - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: 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, 43 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 370700.3ms, OverallIterations: 40, TraceHistogramMax: 7, EmptinessCheckTime: 56.9ms, AutomataDifference: 124324.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1497 SDtfs, 2766 SDslu, 5333 SDs, 0 SdLazy, 3233 SolverSat, 608 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6181.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1802 GetRequests, 1377 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 155368.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=412occurred in iteration=39, InterpolantAutomatonStates: 435, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1332.5ms AutomataMinimizationTime, 39 MinimizatonAttempts, 874 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 360.2ms SsaConstructionTime, 96062.1ms SatisfiabilityAnalysisTime, 120214.6ms InterpolantComputationTime, 1758 NumberOfCodeBlocks, 1714 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 1627 ConstructedInterpolants, 0 QuantifiedInterpolants, 10259 SizeOfPredicates, 294 NumberOfNonLiveVariables, 7234 ConjunctsInSsa, 723 ConjunctsInUnsatCore, 39 InterpolantComputations, 10 PerfectInterpolantSequences, 242/1370 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 19:33:39,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac43979e-a7ab-475d-8c1f-e04597b46d40/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...