./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G --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 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:36:32,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:36:32,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:36:32,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:36:32,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:36:32,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:36:32,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:36:32,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:36:32,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:36:32,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:36:32,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:36:32,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:36:32,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:36:32,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:36:32,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:36:32,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:36:32,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:36:32,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:36:32,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:36:32,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:36:32,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:36:32,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:36:32,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:36:32,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:36:32,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:36:32,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:36:32,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:36:32,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:36:32,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:36:32,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:36:32,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:36:32,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:36:32,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:36:32,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:36:32,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:36:32,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:36:32,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:36:32,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:36:32,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:36:32,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:36:32,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:36:32,523 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:36:32,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:36:32,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:36:32,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:36:32,586 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:36:32,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:36:32,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:36:32,588 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:36:32,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:36:32,589 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:36:32,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:36:32,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:36:32,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:36:32,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:36:32,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:36:32,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:36:32,594 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:36:32,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:36:32,594 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:36:32,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:36:32,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:36:32,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:36:32,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:36:32,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:36:32,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:36:32,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:36:32,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:36:32,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:36:32,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:36:32,598 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:36:32,600 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:36:32,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:36:32,600 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:36:32,601 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_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a [2021-11-23 13:36:32,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:36:32,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:36:32,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:36:32,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:36:32,990 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:36:32,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-11-23 13:36:33,100 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/data/7d1d38d85/2be5228cb8b246d9aa6752e6bb416893/FLAG29b3b58cf [2021-11-23 13:36:33,791 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:36:33,796 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-11-23 13:36:33,810 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/data/7d1d38d85/2be5228cb8b246d9aa6752e6bb416893/FLAG29b3b58cf [2021-11-23 13:36:34,130 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/data/7d1d38d85/2be5228cb8b246d9aa6752e6bb416893 [2021-11-23 13:36:34,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:36:34,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:36:34,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:36:34,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:36:34,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:36:34,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b5cf0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34, skipping insertion in model container [2021-11-23 13:36:34,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:36:34,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:36:34,413 WARN L230 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_06307826-1dcb-4859-a8b0-8d254298848e/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2021-11-23 13:36:34,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:36:34,450 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:36:34,464 WARN L230 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_06307826-1dcb-4859-a8b0-8d254298848e/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2021-11-23 13:36:34,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:36:34,494 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:36:34,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34 WrapperNode [2021-11-23 13:36:34,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:36:34,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:36:34,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:36:34,498 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:36:34,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,547 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 117 [2021-11-23 13:36:34,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:36:34,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:36:34,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:36:34,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:36:34,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:36:34,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:36:34,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:36:34,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:36:34,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34" (1/1) ... [2021-11-23 13:36:34,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:36:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:34,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:36:34,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:36:34,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:36:34,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:36:34,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:36:34,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:36:34,796 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:36:34,798 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:36:35,009 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:36:35,018 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:36:35,019 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 13:36:35,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:36:35 BoogieIcfgContainer [2021-11-23 13:36:35,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:36:35,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:36:35,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:36:35,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:36:35,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:36:34" (1/3) ... [2021-11-23 13:36:35,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba4db55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:36:35, skipping insertion in model container [2021-11-23 13:36:35,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:34" (2/3) ... [2021-11-23 13:36:35,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba4db55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:36:35, skipping insertion in model container [2021-11-23 13:36:35,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:36:35" (3/3) ... [2021-11-23 13:36:35,034 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2021-11-23 13:36:35,041 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:36:35,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-23 13:36:35,105 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:36:35,115 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:36:35,115 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-23 13:36:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 13:36:35,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:35,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:35,162 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:35,170 INFO L85 PathProgramCache]: Analyzing trace with hash -174496848, now seen corresponding path program 1 times [2021-11-23 13:36:35,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:35,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924785794] [2021-11-23 13:36:35,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:35,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:35,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:35,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924785794] [2021-11-23 13:36:35,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924785794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:35,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:35,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:36:35,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506040111] [2021-11-23 13:36:35,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:35,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:36:35,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:35,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:36:35,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:36:35,512 INFO L87 Difference]: Start difference. First operand has 42 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:35,549 INFO L93 Difference]: Finished difference Result 81 states and 114 transitions. [2021-11-23 13:36:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:36:35,553 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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 [2021-11-23 13:36:35,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:35,564 INFO L225 Difference]: With dead ends: 81 [2021-11-23 13:36:35,565 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 13:36:35,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:36:35,580 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:35,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 13:36:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-23 13:36:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-11-23 13:36:35,646 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 14 [2021-11-23 13:36:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:35,647 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-11-23 13:36:35,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-11-23 13:36:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 13:36:35,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:35,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:35,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:36:35,655 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1454171508, now seen corresponding path program 1 times [2021-11-23 13:36:35,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:35,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227956851] [2021-11-23 13:36:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:35,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:35,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:35,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185648279] [2021-11-23 13:36:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:35,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:35,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:35,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:35,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:36:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:36:35,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:36,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:36:36,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:36,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227956851] [2021-11-23 13:36:36,116 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:36,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185648279] [2021-11-23 13:36:36,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185648279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:36,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:36,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:36:36,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026221936] [2021-11-23 13:36:36,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:36,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:36:36,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:36,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:36:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:36:36,122 INFO L87 Difference]: Start difference. First operand 38 states and 40 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) [2021-11-23 13:36:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:36,307 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-11-23 13:36:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:36:36,310 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 [2021-11-23 13:36:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:36,311 INFO L225 Difference]: With dead ends: 66 [2021-11-23 13:36:36,312 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 13:36:36,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:36:36,316 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 137 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:36,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 62 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 13:36:36,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2021-11-23 13:36:36,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-23 13:36:36,337 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 15 [2021-11-23 13:36:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:36,337 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-23 13:36:36,338 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) [2021-11-23 13:36:36,338 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-23 13:36:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 13:36:36,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:36,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:36,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 13:36:36,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:36,557 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:36,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1580206288, now seen corresponding path program 1 times [2021-11-23 13:36:36,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:36,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394853699] [2021-11-23 13:36:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:36,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:36,606 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:36,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347343375] [2021-11-23 13:36:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:36,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:36,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:36,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:36,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:36:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:36:36,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:36,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:36:36,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:36,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394853699] [2021-11-23 13:36:36,861 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:36,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347343375] [2021-11-23 13:36:36,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347343375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:36,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:36,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:36:36,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545459299] [2021-11-23 13:36:36,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:36,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:36,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:36,865 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:36,966 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-11-23 13:36:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:36:36,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 13:36:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:36,972 INFO L225 Difference]: With dead ends: 62 [2021-11-23 13:36:36,972 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 13:36:36,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:36:36,978 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:36,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 13:36:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-11-23 13:36:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.25) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-11-23 13:36:36,998 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-11-23 13:36:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:36,999 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-11-23 13:36:36,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-11-23 13:36:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 13:36:37,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:37,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:37,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:37,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:37,217 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:37,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1840022701, now seen corresponding path program 1 times [2021-11-23 13:36:37,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:37,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988433306] [2021-11-23 13:36:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:37,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:37,235 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:37,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582057128] [2021-11-23 13:36:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:37,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:37,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:37,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:37,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:36:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:36:37,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:37,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:36:37,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:37,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988433306] [2021-11-23 13:36:37,457 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:37,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582057128] [2021-11-23 13:36:37,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582057128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:37,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:37,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:36:37,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092856672] [2021-11-23 13:36:37,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:37,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:37,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:37,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:37,463 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:37,544 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-23 13:36:37,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:36:37,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 13:36:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:37,546 INFO L225 Difference]: With dead ends: 60 [2021-11-23 13:36:37,547 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 13:36:37,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:36:37,549 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:37,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:37,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 13:36:37,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-11-23 13:36:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-11-23 13:36:37,563 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 19 [2021-11-23 13:36:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:37,564 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-11-23 13:36:37,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-11-23 13:36:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 13:36:37,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:37,565 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:37,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:37,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-23 13:36:37,766 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:37,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:37,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1383547082, now seen corresponding path program 1 times [2021-11-23 13:36:37,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:37,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105048408] [2021-11-23 13:36:37,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:37,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:37,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:37,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273169932] [2021-11-23 13:36:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:37,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:37,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:37,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:37,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:36:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:37,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:36:37,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:37,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:38,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105048408] [2021-11-23 13:36:38,057 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:38,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273169932] [2021-11-23 13:36:38,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273169932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:38,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:36:38,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-23 13:36:38,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203010894] [2021-11-23 13:36:38,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:38,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:36:38,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:38,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:36:38,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:36:38,060 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:38,264 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2021-11-23 13:36:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:36:38,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 13:36:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:38,267 INFO L225 Difference]: With dead ends: 146 [2021-11-23 13:36:38,267 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 13:36:38,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:36:38,269 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 180 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:38,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 175 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 13:36:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 78. [2021-11-23 13:36:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 77 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2021-11-23 13:36:38,284 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 20 [2021-11-23 13:36:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:38,285 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2021-11-23 13:36:38,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2021-11-23 13:36:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 13:36:38,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:38,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:38,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:38,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:38,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:38,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1264867958, now seen corresponding path program 1 times [2021-11-23 13:36:38,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:38,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563872191] [2021-11-23 13:36:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:38,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:38,507 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:38,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461659415] [2021-11-23 13:36:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:38,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:38,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:38,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:38,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:36:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:36:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:38,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:36:38,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:38,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563872191] [2021-11-23 13:36:38,686 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:38,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461659415] [2021-11-23 13:36:38,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461659415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:38,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:38,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:36:38,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305937932] [2021-11-23 13:36:38,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:38,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:38,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:38,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:38,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:38,689 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:38,761 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2021-11-23 13:36:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:36:38,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 13:36:38,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:38,767 INFO L225 Difference]: With dead ends: 122 [2021-11-23 13:36:38,767 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 13:36:38,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:36:38,773 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:38,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 13:36:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-11-23 13:36:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.3047619047619048) internal successors, (137), 109 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2021-11-23 13:36:38,795 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 21 [2021-11-23 13:36:38,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:38,795 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2021-11-23 13:36:38,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2021-11-23 13:36:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:36:38,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:38,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:38,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:38,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:38,998 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1836874258, now seen corresponding path program 1 times [2021-11-23 13:36:38,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:38,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690237262] [2021-11-23 13:36:38,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:39,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:39,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:39,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86367949] [2021-11-23 13:36:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:39,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:39,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:39,022 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:39,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:36:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:39,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 13:36:39,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:39,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:39,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:39,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690237262] [2021-11-23 13:36:39,556 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86367949] [2021-11-23 13:36:39,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86367949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:39,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:36:39,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-23 13:36:39,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197470124] [2021-11-23 13:36:39,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:39,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:36:39,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:39,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:36:39,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:36:39,571 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:39,694 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2021-11-23 13:36:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:36:39,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 13:36:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:39,698 INFO L225 Difference]: With dead ends: 138 [2021-11-23 13:36:39,699 INFO L226 Difference]: Without dead ends: 136 [2021-11-23 13:36:39,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:36:39,700 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:39,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 139 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2021-11-23 13:36:39,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-23 13:36:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2021-11-23 13:36:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2941176470588236) internal successors, (154), 123 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 154 transitions. [2021-11-23 13:36:39,725 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 154 transitions. Word has length 22 [2021-11-23 13:36:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:39,726 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 154 transitions. [2021-11-23 13:36:39,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 154 transitions. [2021-11-23 13:36:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:36:39,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:39,728 INFO L514 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, 1] [2021-11-23 13:36:39,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:39,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:39,957 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:39,957 INFO L85 PathProgramCache]: Analyzing trace with hash 62520889, now seen corresponding path program 1 times [2021-11-23 13:36:39,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:39,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714131884] [2021-11-23 13:36:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:39,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:39,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:39,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585243841] [2021-11-23 13:36:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:39,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:39,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:39,973 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:39,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:36:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:40,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:36:40,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:40,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:36:40,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:40,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714131884] [2021-11-23 13:36:40,148 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:40,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585243841] [2021-11-23 13:36:40,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585243841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:40,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:40,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:36:40,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647799007] [2021-11-23 13:36:40,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:40,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:40,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:40,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:40,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:40,151 INFO L87 Difference]: Start difference. First operand 124 states and 154 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:40,256 INFO L93 Difference]: Finished difference Result 235 states and 294 transitions. [2021-11-23 13:36:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:36:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 13:36:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:40,262 INFO L225 Difference]: With dead ends: 235 [2021-11-23 13:36:40,262 INFO L226 Difference]: Without dead ends: 233 [2021-11-23 13:36:40,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:36:40,264 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:40,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 93 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:40,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-23 13:36:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 172. [2021-11-23 13:36:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.2754491017964071) internal successors, (213), 171 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 213 transitions. [2021-11-23 13:36:40,319 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 213 transitions. Word has length 23 [2021-11-23 13:36:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:40,320 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 213 transitions. [2021-11-23 13:36:40,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 213 transitions. [2021-11-23 13:36:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 13:36:40,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:40,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:40,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:40,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 13:36:40,544 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash 4760597, now seen corresponding path program 1 times [2021-11-23 13:36:40,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:40,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364462727] [2021-11-23 13:36:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:40,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:40,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:40,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504781820] [2021-11-23 13:36:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:40,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:40,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:40,570 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:40,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:36:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:40,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 13:36:40,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:40,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:41,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:41,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364462727] [2021-11-23 13:36:41,130 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:41,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504781820] [2021-11-23 13:36:41,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504781820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:41,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:36:41,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-23 13:36:41,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484217724] [2021-11-23 13:36:41,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:41,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:36:41,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:41,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:36:41,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:36:41,134 INFO L87 Difference]: Start difference. First operand 172 states and 213 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:41,319 INFO L93 Difference]: Finished difference Result 222 states and 272 transitions. [2021-11-23 13:36:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:36:41,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 13:36:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:41,322 INFO L225 Difference]: With dead ends: 222 [2021-11-23 13:36:41,322 INFO L226 Difference]: Without dead ends: 220 [2021-11-23 13:36:41,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:36:41,324 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 46 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:41,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 223 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2021-11-23 13:36:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-23 13:36:41,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 209. [2021-11-23 13:36:41,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.2745098039215685) internal successors, (260), 208 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 260 transitions. [2021-11-23 13:36:41,354 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 260 transitions. Word has length 24 [2021-11-23 13:36:41,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:41,354 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 260 transitions. [2021-11-23 13:36:41,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:41,355 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 260 transitions. [2021-11-23 13:36:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 13:36:41,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:41,356 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:41,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:41,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:41,585 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1374585360, now seen corresponding path program 2 times [2021-11-23 13:36:41,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:41,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316266961] [2021-11-23 13:36:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:41,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:41,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:41,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984543016] [2021-11-23 13:36:41,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:36:41,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:41,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:41,603 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:41,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:36:41,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:36:41,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:36:41,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:36:41,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:41,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:36:41,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316266961] [2021-11-23 13:36:41,771 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:41,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984543016] [2021-11-23 13:36:41,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984543016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:41,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:41,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:36:41,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582234768] [2021-11-23 13:36:41,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:41,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:36:41,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:41,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:36:41,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:36:41,778 INFO L87 Difference]: Start difference. First operand 209 states and 260 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:41,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:41,889 INFO L93 Difference]: Finished difference Result 282 states and 342 transitions. [2021-11-23 13:36:41,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:36:41,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 13:36:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:41,891 INFO L225 Difference]: With dead ends: 282 [2021-11-23 13:36:41,892 INFO L226 Difference]: Without dead ends: 177 [2021-11-23 13:36:41,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:36:41,895 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 65 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:41,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 144 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-23 13:36:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 160. [2021-11-23 13:36:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 159 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:41,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 190 transitions. [2021-11-23 13:36:41,950 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 190 transitions. Word has length 27 [2021-11-23 13:36:41,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:41,951 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 190 transitions. [2021-11-23 13:36:41,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:41,951 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 190 transitions. [2021-11-23 13:36:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 13:36:41,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:41,953 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-23 13:36:41,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:42,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 13:36:42,180 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:42,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1021970413, now seen corresponding path program 1 times [2021-11-23 13:36:42,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:42,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717036065] [2021-11-23 13:36:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:42,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:42,193 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:42,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685446147] [2021-11-23 13:36:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:42,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:42,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:42,206 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:42,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:36:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:42,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 13:36:42,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:36:42,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:36:42,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:42,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717036065] [2021-11-23 13:36:42,502 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:42,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685446147] [2021-11-23 13:36:42,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685446147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:42,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:36:42,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-23 13:36:42,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539644259] [2021-11-23 13:36:42,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:42,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:36:42,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:36:42,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:36:42,505 INFO L87 Difference]: Start difference. First operand 160 states and 190 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:42,642 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2021-11-23 13:36:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:36:42,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-23 13:36:42,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:42,644 INFO L225 Difference]: With dead ends: 162 [2021-11-23 13:36:42,645 INFO L226 Difference]: Without dead ends: 160 [2021-11-23 13:36:42,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:36:42,646 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 51 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:42,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 104 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-23 13:36:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-11-23 13:36:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.1870967741935483) internal successors, (184), 159 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:42,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 184 transitions. [2021-11-23 13:36:42,675 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 184 transitions. Word has length 32 [2021-11-23 13:36:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:42,675 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 184 transitions. [2021-11-23 13:36:42,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 184 transitions. [2021-11-23 13:36:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 13:36:42,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:42,677 INFO L514 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, 1, 1, 1] [2021-11-23 13:36:42,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:42,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:42,900 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:42,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1462495526, now seen corresponding path program 1 times [2021-11-23 13:36:42,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:42,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609351180] [2021-11-23 13:36:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:42,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:42,913 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:42,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240699304] [2021-11-23 13:36:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:42,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:42,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:42,915 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:42,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:36:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:42,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 13:36:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:43,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:44,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:44,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609351180] [2021-11-23 13:36:44,728 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:44,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240699304] [2021-11-23 13:36:44,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240699304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:44,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:36:44,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-11-23 13:36:44,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430115685] [2021-11-23 13:36:44,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:44,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 13:36:44,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:44,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 13:36:44,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:36:44,732 INFO L87 Difference]: Start difference. First operand 160 states and 184 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:54,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:54,647 INFO L93 Difference]: Finished difference Result 445 states and 505 transitions. [2021-11-23 13:36:54,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-23 13:36:54,647 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 33 [2021-11-23 13:36:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:54,651 INFO L225 Difference]: With dead ends: 445 [2021-11-23 13:36:54,651 INFO L226 Difference]: Without dead ends: 435 [2021-11-23 13:36:54,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=783, Invalid=3249, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 13:36:54,657 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 464 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:54,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 515 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-23 13:36:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-23 13:36:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 257. [2021-11-23 13:36:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.1904761904761905) internal successors, (300), 256 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:54,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 300 transitions. [2021-11-23 13:36:54,713 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 300 transitions. Word has length 33 [2021-11-23 13:36:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:54,713 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 300 transitions. [2021-11-23 13:36:54,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 300 transitions. [2021-11-23 13:36:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 13:36:54,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:54,715 INFO L514 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, 1] [2021-11-23 13:36:54,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:54,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:54,940 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash -927480236, now seen corresponding path program 1 times [2021-11-23 13:36:54,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:54,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761302389] [2021-11-23 13:36:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:54,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:54,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:54,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015219272] [2021-11-23 13:36:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:54,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:54,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:54,967 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:54,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:36:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:55,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 13:36:55,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:55,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:36:55,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761302389] [2021-11-23 13:36:55,435 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015219272] [2021-11-23 13:36:55,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015219272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:55,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:36:55,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 9 [2021-11-23 13:36:55,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158525041] [2021-11-23 13:36:55,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:55,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:36:55,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:55,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:36:55,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:36:55,438 INFO L87 Difference]: Start difference. First operand 257 states and 300 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:55,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:55,842 INFO L93 Difference]: Finished difference Result 303 states and 354 transitions. [2021-11-23 13:36:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 13:36:55,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-23 13:36:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:55,844 INFO L225 Difference]: With dead ends: 303 [2021-11-23 13:36:55,845 INFO L226 Difference]: Without dead ends: 301 [2021-11-23 13:36:55,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:36:55,846 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 155 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:55,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 136 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-23 13:36:55,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 209. [2021-11-23 13:36:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 205 states have (on average 1.1658536585365853) internal successors, (239), 208 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 239 transitions. [2021-11-23 13:36:55,885 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 239 transitions. Word has length 33 [2021-11-23 13:36:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:55,885 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 239 transitions. [2021-11-23 13:36:55,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 239 transitions. [2021-11-23 13:36:55,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 13:36:55,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:55,886 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-11-23 13:36:55,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:56,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 13:36:56,089 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash -624531068, now seen corresponding path program 1 times [2021-11-23 13:36:56,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:56,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809661393] [2021-11-23 13:36:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:56,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:56,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:56,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409192521] [2021-11-23 13:36:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:56,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:56,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:56,114 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:56,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 13:36:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:56,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:36:56,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:36:56,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:36:56,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:56,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809661393] [2021-11-23 13:36:56,254 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:56,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409192521] [2021-11-23 13:36:56,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409192521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:56,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:56,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:36:56,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843436491] [2021-11-23 13:36:56,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:56,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:36:56,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:56,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:36:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:36:56,256 INFO L87 Difference]: Start difference. First operand 209 states and 239 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:56,376 INFO L93 Difference]: Finished difference Result 399 states and 463 transitions. [2021-11-23 13:36:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:36:56,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 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 39 [2021-11-23 13:36:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:56,378 INFO L225 Difference]: With dead ends: 399 [2021-11-23 13:36:56,379 INFO L226 Difference]: Without dead ends: 276 [2021-11-23 13:36:56,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:36:56,380 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:56,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 93 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-23 13:36:56,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 263. [2021-11-23 13:36:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.1583011583011582) internal successors, (300), 262 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 300 transitions. [2021-11-23 13:36:56,435 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 300 transitions. Word has length 39 [2021-11-23 13:36:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:56,435 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 300 transitions. [2021-11-23 13:36:56,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 300 transitions. [2021-11-23 13:36:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 13:36:56,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:56,436 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-23 13:36:56,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:56,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 13:36:56,664 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash -899920700, now seen corresponding path program 1 times [2021-11-23 13:36:56,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:56,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449762052] [2021-11-23 13:36:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:56,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:56,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:56,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485967372] [2021-11-23 13:36:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:56,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:56,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:56,681 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:56,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 13:36:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:56,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:36:56,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:36:56,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:36:57,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:57,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449762052] [2021-11-23 13:36:57,019 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:36:57,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485967372] [2021-11-23 13:36:57,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485967372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:57,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:36:57,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-23 13:36:57,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642622937] [2021-11-23 13:36:57,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:57,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:36:57,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:36:57,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:36:57,028 INFO L87 Difference]: Start difference. First operand 263 states and 300 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:57,485 INFO L93 Difference]: Finished difference Result 265 states and 301 transitions. [2021-11-23 13:36:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:36:57,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 40 [2021-11-23 13:36:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:57,488 INFO L225 Difference]: With dead ends: 265 [2021-11-23 13:36:57,488 INFO L226 Difference]: Without dead ends: 261 [2021-11-23 13:36:57,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:36:57,490 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:57,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 74 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:36:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-23 13:36:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 186. [2021-11-23 13:36:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 183 states have (on average 1.1256830601092895) internal successors, (206), 185 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 206 transitions. [2021-11-23 13:36:57,567 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 206 transitions. Word has length 40 [2021-11-23 13:36:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:57,568 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 206 transitions. [2021-11-23 13:36:57,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 206 transitions. [2021-11-23 13:36:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 13:36:57,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:57,570 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1] [2021-11-23 13:36:57,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:57,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 13:36:57,780 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:36:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:57,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1535208889, now seen corresponding path program 1 times [2021-11-23 13:36:57,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:57,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931158584] [2021-11-23 13:36:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:57,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:57,791 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:36:57,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759955313] [2021-11-23 13:36:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:57,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:57,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:57,793 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:57,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 13:36:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:57,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-23 13:36:57,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:58,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:37:00,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:00,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931158584] [2021-11-23 13:37:00,418 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:00,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759955313] [2021-11-23 13:37:00,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759955313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:00,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:37:00,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-23 13:37:00,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87511062] [2021-11-23 13:37:00,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:00,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 13:37:00,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:00,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 13:37:00,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-23 13:37:00,421 INFO L87 Difference]: Start difference. First operand 186 states and 206 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:24,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:24,941 INFO L93 Difference]: Finished difference Result 418 states and 466 transitions. [2021-11-23 13:37:24,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 13:37:24,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-23 13:37:24,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:24,944 INFO L225 Difference]: With dead ends: 418 [2021-11-23 13:37:24,945 INFO L226 Difference]: Without dead ends: 414 [2021-11-23 13:37:24,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=619, Invalid=2137, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 13:37:24,948 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 447 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:24,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 356 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-11-23 13:37:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-23 13:37:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 280. [2021-11-23 13:37:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 277 states have (on average 1.1227436823104693) internal successors, (311), 279 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 311 transitions. [2021-11-23 13:37:25,048 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 311 transitions. Word has length 42 [2021-11-23 13:37:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:25,049 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 311 transitions. [2021-11-23 13:37:25,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:25,050 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 311 transitions. [2021-11-23 13:37:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 13:37:25,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:25,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2021-11-23 13:37:25,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:25,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 13:37:25,261 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:37:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash -79294909, now seen corresponding path program 1 times [2021-11-23 13:37:25,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:25,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773043655] [2021-11-23 13:37:25,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:25,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:25,273 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:25,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327285229] [2021-11-23 13:37:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:25,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:25,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:25,284 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:25,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 13:37:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:25,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-23 13:37:25,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:37:26,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:37:33,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:33,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773043655] [2021-11-23 13:37:33,368 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:33,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327285229] [2021-11-23 13:37:33,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327285229] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:33,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:37:33,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-11-23 13:37:33,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216699840] [2021-11-23 13:37:33,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:33,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 13:37:33,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:33,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 13:37:33,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-11-23 13:37:33,371 INFO L87 Difference]: Start difference. First operand 280 states and 311 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:53,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:55,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:06,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:16,118 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:22,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:31,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:32,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:37,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:46,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:49,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:56,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:58,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:59,232 INFO L93 Difference]: Finished difference Result 522 states and 582 transitions. [2021-11-23 13:38:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-23 13:38:59,232 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-23 13:38:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:59,235 INFO L225 Difference]: With dead ends: 522 [2021-11-23 13:38:59,235 INFO L226 Difference]: Without dead ends: 516 [2021-11-23 13:38:59,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5975 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=2445, Invalid=14325, Unknown=0, NotChecked=0, Total=16770 [2021-11-23 13:38:59,243 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 814 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 395 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:59,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 345 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 1079 Invalid, 10 Unknown, 0 Unchecked, 40.5s Time] [2021-11-23 13:38:59,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-23 13:38:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 367. [2021-11-23 13:38:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 364 states have (on average 1.1263736263736264) internal successors, (410), 366 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 410 transitions. [2021-11-23 13:38:59,362 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 410 transitions. Word has length 48 [2021-11-23 13:38:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:59,362 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 410 transitions. [2021-11-23 13:38:59,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 410 transitions. [2021-11-23 13:38:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 13:38:59,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:59,363 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 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, 1] [2021-11-23 13:38:59,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:59,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:59,564 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:38:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:59,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1113179418, now seen corresponding path program 2 times [2021-11-23 13:38:59,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:59,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186040556] [2021-11-23 13:38:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:59,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:59,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:38:59,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047635191] [2021-11-23 13:38:59,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:38:59,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:59,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:59,578 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:59,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 13:38:59,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:38:59,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:59,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 13:38:59,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:38:59,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:38:59,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:59,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186040556] [2021-11-23 13:38:59,872 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:38:59,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047635191] [2021-11-23 13:38:59,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047635191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:59,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:38:59,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-23 13:38:59,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886936766] [2021-11-23 13:38:59,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:59,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 13:38:59,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:59,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 13:38:59,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:38:59,874 INFO L87 Difference]: Start difference. First operand 367 states and 410 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:00,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:00,472 INFO L93 Difference]: Finished difference Result 513 states and 566 transitions. [2021-11-23 13:39:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 13:39:00,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 13:39:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:00,475 INFO L225 Difference]: With dead ends: 513 [2021-11-23 13:39:00,475 INFO L226 Difference]: Without dead ends: 509 [2021-11-23 13:39:00,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-11-23 13:39:00,477 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 206 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:00,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 331 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:39:00,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-23 13:39:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 225. [2021-11-23 13:39:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 222 states have (on average 1.1261261261261262) internal successors, (250), 224 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 250 transitions. [2021-11-23 13:39:00,549 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 250 transitions. Word has length 56 [2021-11-23 13:39:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:00,550 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 250 transitions. [2021-11-23 13:39:00,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 250 transitions. [2021-11-23 13:39:00,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 13:39:00,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:00,551 INFO L514 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, 1, 1, 1, 1] [2021-11-23 13:39:00,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:00,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 13:39:00,760 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:39:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:00,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1379160389, now seen corresponding path program 2 times [2021-11-23 13:39:00,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:00,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728722653] [2021-11-23 13:39:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:00,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:00,767 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:39:00,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688381620] [2021-11-23 13:39:00,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:39:00,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:00,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:00,784 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:00,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 13:39:00,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:39:00,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:00,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-23 13:39:00,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:02,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:11,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:11,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728722653] [2021-11-23 13:39:11,501 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:39:11,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688381620] [2021-11-23 13:39:11,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688381620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:11,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:39:11,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 37 [2021-11-23 13:39:11,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15804516] [2021-11-23 13:39:11,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:11,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:39:11,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:11,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:39:11,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=965, Unknown=2, NotChecked=0, Total=1332 [2021-11-23 13:39:11,504 INFO L87 Difference]: Start difference. First operand 225 states and 250 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 37 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:34,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:39:37,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:39:39,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:39:54,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:39:59,884 WARN L227 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:40:05,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:40:07,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:40:14,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:40:16,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:40:26,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:40:28,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:40:49,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:41:26,178 WARN L227 SmtUtils]: Spent 21.10s on a formula simplification. DAG size of input: 90 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:41:50,194 WARN L227 SmtUtils]: Spent 17.24s on a formula simplification. DAG size of input: 93 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:41:55,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:41:57,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:42:00,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.99s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:42:17,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:42:19,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:42:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:29,448 INFO L93 Difference]: Finished difference Result 687 states and 760 transitions. [2021-11-23 13:42:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-23 13:42:29,448 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 37 states have internal predecessors, (101), 0 states have call successors, (0), 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 [2021-11-23 13:42:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:29,452 INFO L225 Difference]: With dead ends: 687 [2021-11-23 13:42:29,452 INFO L226 Difference]: Without dead ends: 558 [2021-11-23 13:42:29,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3776 ImplicationChecksByTransitivity, 148.7s TimeCoverageRelationStatistics Valid=3193, Invalid=8361, Unknown=2, NotChecked=0, Total=11556 [2021-11-23 13:42:29,457 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 730 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 366 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:29,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 403 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 980 Invalid, 14 Unknown, 0 Unchecked, 56.3s Time] [2021-11-23 13:42:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-23 13:42:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 351. [2021-11-23 13:42:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 348 states have (on average 1.1235632183908046) internal successors, (391), 350 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:29,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 391 transitions. [2021-11-23 13:42:29,639 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 391 transitions. Word has length 56 [2021-11-23 13:42:29,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:29,639 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 391 transitions. [2021-11-23 13:42:29,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 37 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:29,640 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 391 transitions. [2021-11-23 13:42:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 13:42:29,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:29,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:42:29,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 13:42:29,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:29,852 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:42:29,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1005275417, now seen corresponding path program 1 times [2021-11-23 13:42:29,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:29,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324663864] [2021-11-23 13:42:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:29,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:29,861 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:42:29,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468215513] [2021-11-23 13:42:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:29,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:29,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:42:29,865 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:42:29,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 13:42:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:29,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 13:42:29,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:42:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:42:30,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:42:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:42:31,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:31,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324663864] [2021-11-23 13:42:31,544 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:42:31,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468215513] [2021-11-23 13:42:31,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468215513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:42:31,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:42:31,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 25 [2021-11-23 13:42:31,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387904833] [2021-11-23 13:42:31,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:42:31,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 13:42:31,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:31,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 13:42:31,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:42:31,546 INFO L87 Difference]: Start difference. First operand 351 states and 391 transitions. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:37,200 INFO L93 Difference]: Finished difference Result 715 states and 792 transitions. [2021-11-23 13:42:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-23 13:42:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-23 13:42:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:37,206 INFO L225 Difference]: With dead ends: 715 [2021-11-23 13:42:37,206 INFO L226 Difference]: Without dead ends: 637 [2021-11-23 13:42:37,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2549 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1677, Invalid=5979, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 13:42:37,211 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 560 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:37,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 371 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 13:42:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-23 13:42:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 417. [2021-11-23 13:42:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 415 states have (on average 1.106024096385542) internal successors, (459), 416 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:37,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 459 transitions. [2021-11-23 13:42:37,458 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 459 transitions. Word has length 62 [2021-11-23 13:42:37,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:37,459 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 459 transitions. [2021-11-23 13:42:37,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 459 transitions. [2021-11-23 13:42:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 13:42:37,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:37,460 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2021-11-23 13:42:37,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 13:42:37,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:37,660 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:42:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:37,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1719471762, now seen corresponding path program 1 times [2021-11-23 13:42:37,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:37,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069021010] [2021-11-23 13:42:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:37,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:37,669 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:42:37,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455540948] [2021-11-23 13:42:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:37,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:42:37,675 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:42:37,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 13:42:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:38,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-23 13:42:38,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:42:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:42:40,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:42:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 42 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:42:58,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:58,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069021010] [2021-11-23 13:42:58,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:42:58,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455540948] [2021-11-23 13:42:58,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455540948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:42:58,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:42:58,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 35 [2021-11-23 13:42:58,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093599381] [2021-11-23 13:42:58,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:42:58,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 13:42:58,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:58,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 13:42:58,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 13:42:58,185 INFO L87 Difference]: Start difference. First operand 417 states and 459 transitions. Second operand has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:43:01,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:43:05,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:43:23,482 WARN L227 SmtUtils]: Spent 16.31s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:43:30,219 WARN L227 SmtUtils]: Spent 6.61s on a formula simplification. DAG size of input: 63 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:43:32,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:43:40,455 WARN L227 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:43:48,244 WARN L227 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:43:57,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:43:59,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:01,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:15,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:17,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:19,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:21,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:25,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:27,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:31,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:35,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:37,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:41,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:43,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:44:56,471 WARN L227 SmtUtils]: Spent 7.58s on a formula simplification. DAG size of input: 66 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:45:18,709 WARN L227 SmtUtils]: Spent 9.59s on a formula simplification. DAG size of input: 63 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:46:01,454 WARN L227 SmtUtils]: Spent 7.92s on a formula simplification. DAG size of input: 74 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:46:08,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:08,348 INFO L93 Difference]: Finished difference Result 650 states and 714 transitions. [2021-11-23 13:46:08,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-23 13:46:08,349 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 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 65 [2021-11-23 13:46:08,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:08,354 INFO L225 Difference]: With dead ends: 650 [2021-11-23 13:46:08,354 INFO L226 Difference]: Without dead ends: 648 [2021-11-23 13:46:08,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4259 ImplicationChecksByTransitivity, 148.7s TimeCoverageRelationStatistics Valid=2778, Invalid=10558, Unknown=4, NotChecked=0, Total=13340 [2021-11-23 13:46:08,360 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 656 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 367 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:08,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 370 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 1296 Invalid, 17 Unknown, 0 Unchecked, 52.4s Time] [2021-11-23 13:46:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-23 13:46:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 504. [2021-11-23 13:46:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 502 states have (on average 1.1075697211155378) internal successors, (556), 503 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 556 transitions. [2021-11-23 13:46:08,720 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 556 transitions. Word has length 65 [2021-11-23 13:46:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:08,721 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 556 transitions. [2021-11-23 13:46:08,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 556 transitions. [2021-11-23 13:46:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 13:46:08,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:08,724 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:08,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:08,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:08,945 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:46:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:08,945 INFO L85 PathProgramCache]: Analyzing trace with hash -890575282, now seen corresponding path program 3 times [2021-11-23 13:46:08,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:08,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893759804] [2021-11-23 13:46:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:08,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:08,954 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:46:08,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922059181] [2021-11-23 13:46:08,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:46:08,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:08,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:08,963 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:08,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 13:46:09,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 13:46:09,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:09,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-23 13:46:09,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 13:46:10,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 52 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:46:24,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:24,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893759804] [2021-11-23 13:46:24,277 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:46:24,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922059181] [2021-11-23 13:46:24,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922059181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:46:24,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:46:24,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-11-23 13:46:24,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212245565] [2021-11-23 13:46:24,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:24,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 13:46:24,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:24,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 13:46:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:46:24,279 INFO L87 Difference]: Start difference. First operand 504 states and 556 transitions. Second operand has 25 states, 25 states have (on average 4.32) internal successors, (108), 25 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:49,567 WARN L227 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 65 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:47:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:27,007 INFO L93 Difference]: Finished difference Result 684 states and 758 transitions. [2021-11-23 13:47:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 13:47:27,008 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.32) internal successors, (108), 25 states have internal predecessors, (108), 0 states have call successors, (0), 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 71 [2021-11-23 13:47:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:27,013 INFO L225 Difference]: With dead ends: 684 [2021-11-23 13:47:27,014 INFO L226 Difference]: Without dead ends: 678 [2021-11-23 13:47:27,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 70.2s TimeCoverageRelationStatistics Valid=722, Invalid=3562, Unknown=6, NotChecked=0, Total=4290 [2021-11-23 13:47:27,016 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 128 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:27,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 289 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 399 Invalid, 0 Unknown, 205 Unchecked, 3.1s Time] [2021-11-23 13:47:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-11-23 13:47:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 507. [2021-11-23 13:47:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 505 states have (on average 1.108910891089109) internal successors, (560), 506 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 560 transitions. [2021-11-23 13:47:27,460 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 560 transitions. Word has length 71 [2021-11-23 13:47:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:27,461 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 560 transitions. [2021-11-23 13:47:27,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.32) internal successors, (108), 25 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 560 transitions. [2021-11-23 13:47:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 13:47:27,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:27,464 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:27,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 13:47:27,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 13:47:27,680 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 13:47:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:27,681 INFO L85 PathProgramCache]: Analyzing trace with hash 112435271, now seen corresponding path program 4 times [2021-11-23 13:47:27,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:27,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988368064] [2021-11-23 13:47:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:27,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:27,693 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:47:27,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314023994] [2021-11-23 13:47:27,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:47:27,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:47:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:47:27,708 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:47:27,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06307826-1dcb-4859-a8b0-8d254298848e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 13:47:27,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:47:27,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:47:27,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-23 13:47:27,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:47:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:33,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:47:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 31 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 13:47:57,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988368064] [2021-11-23 13:47:57,763 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:47:57,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314023994] [2021-11-23 13:47:57,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314023994] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:47:57,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:47:57,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19] total 43 [2021-11-23 13:47:57,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710254771] [2021-11-23 13:47:57,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:47:57,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 13:47:57,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 13:47:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1370, Unknown=1, NotChecked=0, Total=1806 [2021-11-23 13:47:57,766 INFO L87 Difference]: Start difference. First operand 507 states and 560 transitions. Second operand has 43 states, 43 states have (on average 3.186046511627907) internal successors, (137), 43 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:13,096 WARN L227 SmtUtils]: Spent 10.19s on a formula simplification. DAG size of input: 116 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:48:24,883 WARN L227 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 117 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:48:32,750 WARN L227 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 112 DAG size of output: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:48:43,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:48:48,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:48:51,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:49:04,396 WARN L227 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 107 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:49:17,911 WARN L227 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 116 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:49:32,347 WARN L227 SmtUtils]: Spent 11.85s on a formula simplification. DAG size of input: 114 DAG size of output: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:49:45,069 WARN L227 SmtUtils]: Spent 9.69s on a formula simplification. DAG size of input: 117 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:49:58,244 WARN L227 SmtUtils]: Spent 9.53s on a formula simplification. DAG size of input: 114 DAG size of output: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:50:11,122 WARN L227 SmtUtils]: Spent 8.64s on a formula simplification. DAG size of input: 117 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:50:15,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:50:24,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:50:26,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []