./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd3-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0 --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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:41:39,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:41:39,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:41:39,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:41:39,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:41:39,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:41:39,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:41:39,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:41:39,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:41:39,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:41:39,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:41:39,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:41:39,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:41:39,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:41:39,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:41:39,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:41:39,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:41:39,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:41:39,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:41:39,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:41:39,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:41:39,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:41:39,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:41:39,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:41:39,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:41:39,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:41:39,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:41:39,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:41:39,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:41:39,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:41:39,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:41:39,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:41:39,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:41:39,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:41:39,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:41:39,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:41:39,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:41:39,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:41:39,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:41:39,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:41:39,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:41:39,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:41:39,432 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:41:39,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:41:39,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:41:39,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:41:39,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:41:39,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:41:39,435 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:41:39,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:41:39,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:41:39,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:41:39,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:41:39,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:41:39,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:41:39,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:41:39,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:41:39,438 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:41:39,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:41:39,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:41:39,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:41:39,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:41:39,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:41:39,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:41:39,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:41:39,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:41:39,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:41:39,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:41:39,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:41:39,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:41:39,443 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:41:39,443 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:41:39,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:41:39,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:41:39,444 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_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2021-11-22 14:41:39,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:41:39,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:41:39,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:41:39,811 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:41:39,812 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:41:39,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2021-11-22 14:41:39,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/data/81d685658/57f59841cce24ecca59d900f59f1558d/FLAG5a264bab9 [2021-11-22 14:41:40,578 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:41:40,579 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2021-11-22 14:41:40,587 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/data/81d685658/57f59841cce24ecca59d900f59f1558d/FLAG5a264bab9 [2021-11-22 14:41:40,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/data/81d685658/57f59841cce24ecca59d900f59f1558d [2021-11-22 14:41:40,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:41:40,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:41:40,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:41:40,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:41:40,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:41:40,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:41:40" (1/1) ... [2021-11-22 14:41:40,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57bca540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:40, skipping insertion in model container [2021-11-22 14:41:40,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:41:40" (1/1) ... [2021-11-22 14:41:40,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:41:40,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:41:41,130 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_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2021-11-22 14:41:41,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:41:41,225 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:41:41,246 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_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2021-11-22 14:41:41,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:41:41,299 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:41:41,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41 WrapperNode [2021-11-22 14:41:41,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:41:41,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:41:41,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:41:41,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:41:41,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41" (1/1) ... [2021-11-22 14:41:41,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41" (1/1) ... [2021-11-22 14:41:41,364 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 109 [2021-11-22 14:41:41,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:41:41,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:41:41,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:41:41,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:41:41,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41" (1/1) ... [2021-11-22 14:41:41,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41" (1/1) ... [2021-11-22 14:41:41,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41" (1/1) ... [2021-11-22 14:41:41,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41" (1/1) ... [2021-11-22 14:41:41,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41" (1/1) ... [2021-11-22 14:41:41,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41" (1/1) ... [2021-11-22 14:41:41,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41" (1/1) ... [2021-11-22 14:41:41,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:41:41,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:41:41,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:41:41,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:41:41,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41" (1/1) ... [2021-11-22 14:41:41,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:41:41,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:41,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:41:41,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:41:41,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:41:41,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:41:41,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:41:41,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:41:41,636 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:41:41,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:41:41,875 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:41:41,883 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:41:41,884 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 14:41:41,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:41:41 BoogieIcfgContainer [2021-11-22 14:41:41,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:41:41,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:41:41,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:41:41,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:41:41,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:41:40" (1/3) ... [2021-11-22 14:41:41,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479660ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:41:41, skipping insertion in model container [2021-11-22 14:41:41,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:41" (2/3) ... [2021-11-22 14:41:41,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479660ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:41:41, skipping insertion in model container [2021-11-22 14:41:41,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:41:41" (3/3) ... [2021-11-22 14:41:41,912 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2021-11-22 14:41:41,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:41:41,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-22 14:41:41,984 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:41:41,994 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 [2021-11-22 14:41:41,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-22 14:41:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 32 states have (on average 1.65625) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:42,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 14:41:42,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:42,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:42,037 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)] === [2021-11-22 14:41:42,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:42,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1233401329, now seen corresponding path program 1 times [2021-11-22 14:41:42,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:42,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824761036] [2021-11-22 14:41:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:42,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:42,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:42,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824761036] [2021-11-22 14:41:42,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824761036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:42,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:42,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:41:42,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325458940] [2021-11-22 14:41:42,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:42,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:41:42,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:41:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:41:42,284 INFO L87 Difference]: Start difference. First operand has 38 states, 32 states have (on average 1.65625) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:42,308 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2021-11-22 14:41:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:41:42,311 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-22 14:41:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:42,322 INFO L225 Difference]: With dead ends: 73 [2021-11-22 14:41:42,323 INFO L226 Difference]: Without dead ends: 34 [2021-11-22 14:41:42,326 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 [2021-11-22 14:41:42,332 INFO L933 BasicCegarLoop]: 40 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, 40 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 [2021-11-22 14:41:42,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:41:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-22 14:41:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-22 14:41:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 33 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) [2021-11-22 14:41:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-11-22 14:41:42,411 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 10 [2021-11-22 14:41:42,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:42,412 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-11-22 14:41:42,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-11-22 14:41:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 14:41:42,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:42,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:42,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:41:42,415 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)] === [2021-11-22 14:41:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:42,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1503548278, now seen corresponding path program 1 times [2021-11-22 14:41:42,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:42,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57970929] [2021-11-22 14:41:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:42,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:42,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:41:42,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459042696] [2021-11-22 14:41:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:42,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:42,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:42,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:42,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:41:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:42,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 14:41:42,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:42,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:41:42,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:42,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57970929] [2021-11-22 14:41:42,836 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:41:42,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459042696] [2021-11-22 14:41:42,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459042696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:42,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:42,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:41:42,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613945562] [2021-11-22 14:41:42,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:42,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:41:42,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:42,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:41:42,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:41:42,850 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:43,048 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-11-22 14:41:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:41:43,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 14:41:43,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:43,051 INFO L225 Difference]: With dead ends: 62 [2021-11-22 14:41:43,052 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 14:41:43,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:41:43,059 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 137 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:43,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 51 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 14:41:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2021-11-22 14:41:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-22 14:41:43,084 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 11 [2021-11-22 14:41:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:43,084 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-22 14:41:43,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-22 14:41:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 14:41:43,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:43,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:43,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:43,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:43,326 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)] === [2021-11-22 14:41:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:43,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1815125850, now seen corresponding path program 1 times [2021-11-22 14:41:43,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:43,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007776865] [2021-11-22 14:41:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:43,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:43,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:41:43,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845391852] [2021-11-22 14:41:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:43,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:43,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:43,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:43,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:41:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:43,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 14:41:43,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:43,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:41:43,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:43,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007776865] [2021-11-22 14:41:43,741 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:41:43,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845391852] [2021-11-22 14:41:43,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845391852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:43,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:43,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:41:43,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665971529] [2021-11-22 14:41:43,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:43,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:41:43,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:43,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:41:43,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:41:43,745 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:43,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:43,927 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-11-22 14:41:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:41:43,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-22 14:41:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:43,929 INFO L225 Difference]: With dead ends: 58 [2021-11-22 14:41:43,930 INFO L226 Difference]: Without dead ends: 56 [2021-11-22 14:41:43,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:41:43,932 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 127 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:43,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 71 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-22 14:41:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2021-11-22 14:41:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-22 14:41:43,948 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 13 [2021-11-22 14:41:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:43,948 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-22 14:41:43,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-22 14:41:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 14:41:43,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:43,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:44,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-22 14:41:44,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:44,170 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)] === [2021-11-22 14:41:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:44,171 INFO L85 PathProgramCache]: Analyzing trace with hash -579062807, now seen corresponding path program 1 times [2021-11-22 14:41:44,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:44,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487332566] [2021-11-22 14:41:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:44,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:44,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:41:44,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386862586] [2021-11-22 14:41:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:44,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:44,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:44,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:44,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:41:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:44,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-22 14:41:44,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:44,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:41:44,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:44,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487332566] [2021-11-22 14:41:44,805 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:41:44,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386862586] [2021-11-22 14:41:44,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386862586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:44,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:44,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 14:41:44,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591467242] [2021-11-22 14:41:44,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:44,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:41:44,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:41:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:41:44,810 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:45,353 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-11-22 14:41:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 14:41:45,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 14:41:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:45,355 INFO L225 Difference]: With dead ends: 74 [2021-11-22 14:41:45,355 INFO L226 Difference]: Without dead ends: 72 [2021-11-22 14:41:45,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:41:45,357 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 185 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:45,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:41:45,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-22 14:41:45,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 49. [2021-11-22 14:41:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.25) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-11-22 14:41:45,370 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 15 [2021-11-22 14:41:45,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:45,371 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-11-22 14:41:45,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-11-22 14:41:45,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 14:41:45,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:45,372 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:45,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:45,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:45,590 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)] === [2021-11-22 14:41:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:45,591 INFO L85 PathProgramCache]: Analyzing trace with hash -948496046, now seen corresponding path program 1 times [2021-11-22 14:41:45,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:45,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519478109] [2021-11-22 14:41:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:45,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:45,610 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:41:45,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879809178] [2021-11-22 14:41:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:45,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:45,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:45,623 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:45,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:41:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 14:41:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:45,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:45,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:45,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519478109] [2021-11-22 14:41:45,864 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:41:45,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879809178] [2021-11-22 14:41:45,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879809178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:45,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:41:45,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-22 14:41:45,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906091737] [2021-11-22 14:41:45,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:45,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 14:41:45,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 14:41:45,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:41:45,870 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:46,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:46,071 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2021-11-22 14:41:46,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:41:46,072 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-22 14:41:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:46,079 INFO L225 Difference]: With dead ends: 142 [2021-11-22 14:41:46,080 INFO L226 Difference]: Without dead ends: 138 [2021-11-22 14:41:46,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:41:46,085 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 180 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:46,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 156 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-22 14:41:46,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 74. [2021-11-22 14:41:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2021-11-22 14:41:46,121 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 16 [2021-11-22 14:41:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:46,125 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2021-11-22 14:41:46,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2021-11-22 14:41:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 14:41:46,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:46,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:46,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:46,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:46,354 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)] === [2021-11-22 14:41:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:46,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1866548172, now seen corresponding path program 1 times [2021-11-22 14:41:46,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:46,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255649745] [2021-11-22 14:41:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:46,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:46,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:41:46,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889668971] [2021-11-22 14:41:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:46,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:46,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:46,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:46,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:41:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:46,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 14:41:46,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:46,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:41:46,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:46,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255649745] [2021-11-22 14:41:46,547 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:41:46,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889668971] [2021-11-22 14:41:46,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889668971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:46,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:46,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:41:46,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916550225] [2021-11-22 14:41:46,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:46,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:41:46,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:46,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:41:46,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:41:46,550 INFO L87 Difference]: Start difference. First operand 74 states and 90 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) [2021-11-22 14:41:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:46,626 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2021-11-22 14:41:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:41:46,627 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 [2021-11-22 14:41:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:46,628 INFO L225 Difference]: With dead ends: 118 [2021-11-22 14:41:46,628 INFO L226 Difference]: Without dead ends: 116 [2021-11-22 14:41:46,629 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 [2021-11-22 14:41:46,632 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 67 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 [2021-11-22 14:41:46,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 67 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:41:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-22 14:41:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 106. [2021-11-22 14:41:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.316831683168317) internal successors, (133), 105 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2021-11-22 14:41:46,676 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 17 [2021-11-22 14:41:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:46,677 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2021-11-22 14:41:46,677 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) [2021-11-22 14:41:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2021-11-22 14:41:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 14:41:46,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:46,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:46,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:46,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:46,902 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)] === [2021-11-22 14:41:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:46,902 INFO L85 PathProgramCache]: Analyzing trace with hash -985875602, now seen corresponding path program 1 times [2021-11-22 14:41:46,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:46,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276006974] [2021-11-22 14:41:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:46,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:46,918 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:41:46,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557730246] [2021-11-22 14:41:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:46,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:46,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:46,920 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:46,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 14:41:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-22 14:41:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:47,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:47,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:47,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276006974] [2021-11-22 14:41:47,421 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:41:47,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557730246] [2021-11-22 14:41:47,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557730246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:47,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:41:47,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-11-22 14:41:47,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632319360] [2021-11-22 14:41:47,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:47,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:41:47,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:41:47,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:41:47,424 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 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) [2021-11-22 14:41:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:47,657 INFO L93 Difference]: Finished difference Result 181 states and 224 transitions. [2021-11-22 14:41:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:41:47,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 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 18 [2021-11-22 14:41:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:47,661 INFO L225 Difference]: With dead ends: 181 [2021-11-22 14:41:47,661 INFO L226 Difference]: Without dead ends: 179 [2021-11-22 14:41:47,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:41:47,662 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 154 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:47,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 181 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-22 14:41:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 162. [2021-11-22 14:41:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.3248407643312101) internal successors, (208), 161 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 208 transitions. [2021-11-22 14:41:47,697 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 208 transitions. Word has length 18 [2021-11-22 14:41:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:47,697 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 208 transitions. [2021-11-22 14:41:47,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 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) [2021-11-22 14:41:47,698 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 208 transitions. [2021-11-22 14:41:47,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 14:41:47,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:47,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:47,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:47,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:47,926 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)] === [2021-11-22 14:41:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:47,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1543378865, now seen corresponding path program 1 times [2021-11-22 14:41:47,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:47,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496524886] [2021-11-22 14:41:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:47,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:47,941 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:41:47,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60465556] [2021-11-22 14:41:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:47,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:47,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:47,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:47,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 14:41:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:47,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 14:41:48,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:48,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:41:48,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:48,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496524886] [2021-11-22 14:41:48,172 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:41:48,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60465556] [2021-11-22 14:41:48,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60465556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:48,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:48,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:41:48,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448894652] [2021-11-22 14:41:48,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:48,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:41:48,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:48,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:41:48,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:41:48,175 INFO L87 Difference]: Start difference. First operand 162 states and 208 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-11-22 14:41:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:48,461 INFO L93 Difference]: Finished difference Result 209 states and 261 transitions. [2021-11-22 14:41:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:41:48,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 [2021-11-22 14:41:48,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:48,464 INFO L225 Difference]: With dead ends: 209 [2021-11-22 14:41:48,464 INFO L226 Difference]: Without dead ends: 207 [2021-11-22 14:41:48,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:41:48,466 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 147 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:48,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 106 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-22 14:41:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 178. [2021-11-22 14:41:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.300578034682081) internal successors, (225), 177 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 225 transitions. [2021-11-22 14:41:48,497 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 225 transitions. Word has length 19 [2021-11-22 14:41:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:48,498 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 225 transitions. [2021-11-22 14:41:48,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-11-22 14:41:48,498 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 225 transitions. [2021-11-22 14:41:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 14:41:48,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:48,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:48,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:48,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-22 14:41:48,726 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)] === [2021-11-22 14:41:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1761475761, now seen corresponding path program 1 times [2021-11-22 14:41:48,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:48,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729663750] [2021-11-22 14:41:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:48,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:48,737 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:41:48,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947406352] [2021-11-22 14:41:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:48,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:48,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:48,739 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:48,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 14:41:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:48,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-22 14:41:48,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:49,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:49,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:49,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729663750] [2021-11-22 14:41:49,363 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:41:49,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947406352] [2021-11-22 14:41:49,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947406352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:49,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:41:49,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-22 14:41:49,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441752316] [2021-11-22 14:41:49,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:49,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:41:49,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:41:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:41:49,366 INFO L87 Difference]: Start difference. First operand 178 states and 225 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 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) [2021-11-22 14:41:49,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:49,607 INFO L93 Difference]: Finished difference Result 193 states and 234 transitions. [2021-11-22 14:41:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:41:49,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 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 20 [2021-11-22 14:41:49,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:49,610 INFO L225 Difference]: With dead ends: 193 [2021-11-22 14:41:49,610 INFO L226 Difference]: Without dead ends: 191 [2021-11-22 14:41:49,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:41:49,611 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 65 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:49,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 222 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2021-11-22 14:41:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-22 14:41:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2021-11-22 14:41:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.2890173410404624) internal successors, (223), 177 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 223 transitions. [2021-11-22 14:41:49,639 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 223 transitions. Word has length 20 [2021-11-22 14:41:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:49,639 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 223 transitions. [2021-11-22 14:41:49,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 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) [2021-11-22 14:41:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 223 transitions. [2021-11-22 14:41:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 14:41:49,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:49,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:49,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:49,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:49,862 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)] === [2021-11-22 14:41:49,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:49,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1499520422, now seen corresponding path program 2 times [2021-11-22 14:41:49,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:49,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082362534] [2021-11-22 14:41:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:49,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:49,875 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:41:49,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617487132] [2021-11-22 14:41:49,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:41:49,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:49,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:49,877 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:49,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 14:41:49,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:41:49,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:49,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:41:49,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:50,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:41:50,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:50,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082362534] [2021-11-22 14:41:50,012 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:41:50,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617487132] [2021-11-22 14:41:50,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617487132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:50,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:50,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:41:50,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169754122] [2021-11-22 14:41:50,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:50,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:41:50,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:50,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:41:50,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:41:50,018 INFO L87 Difference]: Start difference. First operand 178 states and 223 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-11-22 14:41:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:50,123 INFO L93 Difference]: Finished difference Result 236 states and 285 transitions. [2021-11-22 14:41:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:41:50,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 [2021-11-22 14:41:50,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:50,125 INFO L225 Difference]: With dead ends: 236 [2021-11-22 14:41:50,126 INFO L226 Difference]: Without dead ends: 163 [2021-11-22 14:41:50,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:41:50,129 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 65 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 124 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 [2021-11-22 14:41:50,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 124 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-22 14:41:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 145. [2021-11-22 14:41:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.2428571428571429) internal successors, (174), 144 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2021-11-22 14:41:50,153 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 23 [2021-11-22 14:41:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:50,154 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2021-11-22 14:41:50,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-11-22 14:41:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2021-11-22 14:41:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-22 14:41:50,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:50,157 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] [2021-11-22 14:41:50,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:50,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 14:41:50,370 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 14:41:50,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:50,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1805513449, now seen corresponding path program 1 times [2021-11-22 14:41:50,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:50,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479650209] [2021-11-22 14:41:50,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:50,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:50,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:41:50,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114231733] [2021-11-22 14:41:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:50,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:50,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:50,385 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:50,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 14:41:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 14:41:50,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:41:50,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:41:50,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:50,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479650209] [2021-11-22 14:41:50,532 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:41:50,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114231733] [2021-11-22 14:41:50,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114231733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:50,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:50,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:41:50,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930073607] [2021-11-22 14:41:50,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:50,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:41:50,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:50,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:41:50,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:41:50,535 INFO L87 Difference]: Start difference. First operand 145 states and 174 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) [2021-11-22 14:41:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:50,630 INFO L93 Difference]: Finished difference Result 254 states and 308 transitions. [2021-11-22 14:41:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:41:50,631 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 24 [2021-11-22 14:41:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:50,633 INFO L225 Difference]: With dead ends: 254 [2021-11-22 14:41:50,634 INFO L226 Difference]: Without dead ends: 252 [2021-11-22 14:41:50,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:41:50,635 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:50,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 81 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:41:50,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-22 14:41:50,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 193. [2021-11-22 14:41:50,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.2287234042553192) internal successors, (231), 192 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 231 transitions. [2021-11-22 14:41:50,668 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 231 transitions. Word has length 24 [2021-11-22 14:41:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:50,669 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 231 transitions. [2021-11-22 14:41:50,669 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) [2021-11-22 14:41:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 231 transitions. [2021-11-22 14:41:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 14:41:50,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:50,671 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] [2021-11-22 14:41:50,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:50,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-22 14:41:50,890 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)] === [2021-11-22 14:41:50,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:50,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1046808316, now seen corresponding path program 1 times [2021-11-22 14:41:50,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:50,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521746976] [2021-11-22 14:41:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:50,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:50,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:41:50,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012896213] [2021-11-22 14:41:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:50,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:50,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:50,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:50,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 14:41:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:50,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-22 14:41:50,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:52,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:28,363 WARN L227 SmtUtils]: Spent 14.00s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:42:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:34,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:34,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521746976] [2021-11-22 14:42:34,614 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:42:34,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012896213] [2021-11-22 14:42:34,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012896213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:34,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:42:34,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-22 14:42:34,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877627284] [2021-11-22 14:42:34,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:34,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 14:42:34,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:34,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 14:42:34,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=344, Unknown=2, NotChecked=0, Total=420 [2021-11-22 14:42:34,617 INFO L87 Difference]: Start difference. First operand 193 states and 231 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-11-22 14:42:58,205 WARN L227 SmtUtils]: Spent 13.67s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:43:48,384 WARN L227 SmtUtils]: Spent 40.44s on a formula simplification. DAG size of input: 83 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:44:30,195 WARN L227 SmtUtils]: Spent 37.72s on a formula simplification. DAG size of input: 86 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:45:18,085 WARN L227 SmtUtils]: Spent 43.80s on a formula simplification. DAG size of input: 80 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:45:20,719 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 [] [2021-11-22 14:45:22,722 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 [] [2021-11-22 14:45:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:45:39,916 INFO L93 Difference]: Finished difference Result 440 states and 518 transitions. [2021-11-22 14:45:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-22 14:45:39,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 29 [2021-11-22 14:45:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:45:39,920 INFO L225 Difference]: With dead ends: 440 [2021-11-22 14:45:39,920 INFO L226 Difference]: Without dead ends: 432 [2021-11-22 14:45:39,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 204.3s TimeCoverageRelationStatistics Valid=552, Invalid=2974, Unknown=14, NotChecked=0, Total=3540 [2021-11-22 14:45:39,924 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 424 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 147 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:45:39,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 432 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 601 Invalid, 2 Unknown, 141 Unchecked, 6.5s Time] [2021-11-22 14:45:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-22 14:45:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 250. [2021-11-22 14:45:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.236734693877551) internal successors, (303), 249 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:45:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 303 transitions. [2021-11-22 14:45:39,984 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 303 transitions. Word has length 29 [2021-11-22 14:45:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:45:39,985 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 303 transitions. [2021-11-22 14:45:39,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-11-22 14:45:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 303 transitions. [2021-11-22 14:45:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 14:45:39,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:45:39,987 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] [2021-11-22 14:45:40,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 14:45:40,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-22 14:45:40,214 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)] === [2021-11-22 14:45:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:45:40,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1343167446, now seen corresponding path program 1 times [2021-11-22 14:45:40,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:45:40,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686029237] [2021-11-22 14:45:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:45:40,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:45:40,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:45:40,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42901936] [2021-11-22 14:45:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:45:40,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:45:40,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:45:40,233 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:45:40,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 14:45:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:45:40,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-22 14:45:40,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:45:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:45:40,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:45:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 14:45:40,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:45:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686029237] [2021-11-22 14:45:40,720 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:45:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42901936] [2021-11-22 14:45:40,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42901936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:45:40,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:45:40,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 9 [2021-11-22 14:45:40,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144726518] [2021-11-22 14:45:40,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:45:40,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:45:40,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:45:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:45:40,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:45:40,723 INFO L87 Difference]: Start difference. First operand 250 states and 303 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:45:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:45:41,194 INFO L93 Difference]: Finished difference Result 302 states and 364 transitions. [2021-11-22 14:45:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 14:45:41,195 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-22 14:45:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:45:41,198 INFO L225 Difference]: With dead ends: 302 [2021-11-22 14:45:41,198 INFO L226 Difference]: Without dead ends: 300 [2021-11-22 14:45:41,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-11-22 14:45:41,200 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 176 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:45:41,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 85 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:45:41,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-22 14:45:41,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 208. [2021-11-22 14:45:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.196078431372549) internal successors, (244), 207 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:45:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 244 transitions. [2021-11-22 14:45:41,263 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 244 transitions. Word has length 29 [2021-11-22 14:45:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:45:41,264 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 244 transitions. [2021-11-22 14:45:41,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:45:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 244 transitions. [2021-11-22 14:45:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 14:45:41,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:45:41,271 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] [2021-11-22 14:45:41,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 14:45:41,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:45:41,484 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)] === [2021-11-22 14:45:41,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:45:41,485 INFO L85 PathProgramCache]: Analyzing trace with hash -703526046, now seen corresponding path program 1 times [2021-11-22 14:45:41,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:45:41,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377089311] [2021-11-22 14:45:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:45:41,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:45:41,494 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:45:41,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453447091] [2021-11-22 14:45:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:45:41,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:45:41,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:45:41,505 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:45:41,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 14:45:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:45:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:45:41,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:45:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:45:41,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:45:41,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:45:41,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377089311] [2021-11-22 14:45:41,659 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:45:41,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453447091] [2021-11-22 14:45:41,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453447091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:45:41,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:45:41,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:45:41,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77869912] [2021-11-22 14:45:41,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:45:41,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:45:41,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:45:41,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:45:41,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:45:41,662 INFO L87 Difference]: Start difference. First operand 208 states and 244 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:45:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:45:41,785 INFO L93 Difference]: Finished difference Result 396 states and 470 transitions. [2021-11-22 14:45:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:45:41,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-22 14:45:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:45:41,788 INFO L225 Difference]: With dead ends: 396 [2021-11-22 14:45:41,788 INFO L226 Difference]: Without dead ends: 259 [2021-11-22 14:45:41,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:45:41,790 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:45:41,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 92 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:45:41,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-22 14:45:41,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 238. [2021-11-22 14:45:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 234 states have (on average 1.1923076923076923) internal successors, (279), 237 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:45:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 279 transitions. [2021-11-22 14:45:41,855 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 279 transitions. Word has length 30 [2021-11-22 14:45:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:45:41,855 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 279 transitions. [2021-11-22 14:45:41,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:45:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 279 transitions. [2021-11-22 14:45:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 14:45:41,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:45:41,857 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] [2021-11-22 14:45:41,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-22 14:45:42,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:45:42,082 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)] === [2021-11-22 14:45:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:45:42,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1544363872, now seen corresponding path program 1 times [2021-11-22 14:45:42,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:45:42,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385392510] [2021-11-22 14:45:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:45:42,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:45:42,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:45:42,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277662699] [2021-11-22 14:45:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:45:42,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:45:42,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:45:42,095 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:45:42,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 14:45:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:45:42,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 14:45:42,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:45:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:45:42,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:45:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:45:42,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:45:42,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385392510] [2021-11-22 14:45:42,441 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:45:42,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277662699] [2021-11-22 14:45:42,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277662699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:45:42,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:45:42,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-22 14:45:42,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775399645] [2021-11-22 14:45:42,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:45:42,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:45:42,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:45:42,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:45:42,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:45:42,443 INFO L87 Difference]: Start difference. First operand 238 states and 279 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:45:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:45:42,789 INFO L93 Difference]: Finished difference Result 240 states and 280 transitions. [2021-11-22 14:45:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:45:42,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 14:45:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:45:42,792 INFO L225 Difference]: With dead ends: 240 [2021-11-22 14:45:42,792 INFO L226 Difference]: Without dead ends: 236 [2021-11-22 14:45:42,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:45:42,793 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:45:42,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 63 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:45:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-22 14:45:42,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 110. [2021-11-22 14:45:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 109 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:45:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-11-22 14:45:42,833 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 36 [2021-11-22 14:45:42,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:45:42,834 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-11-22 14:45:42,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:45:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-11-22 14:45:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-22 14:45:42,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:45:42,835 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] [2021-11-22 14:45:42,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 14:45:43,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-22 14:45:43,050 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)] === [2021-11-22 14:45:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:45:43,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1924846557, now seen corresponding path program 1 times [2021-11-22 14:45:43,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:45:43,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027362137] [2021-11-22 14:45:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:45:43,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:45:43,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:45:43,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711629107] [2021-11-22 14:45:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:45:43,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:45:43,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:45:43,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:45:43,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 14:45:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:45:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-22 14:45:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:45:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:45:44,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:45:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:45:45,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:45:45,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027362137] [2021-11-22 14:45:45,141 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:45:45,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711629107] [2021-11-22 14:45:45,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711629107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:45:45,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:45:45,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-11-22 14:45:45,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925558022] [2021-11-22 14:45:45,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:45:45,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-22 14:45:45,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:45:45,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-22 14:45:45,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-11-22 14:45:45,144 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:45:52,837 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 [] [2021-11-22 14:45:54,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:45:58,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:46:02,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:46:04,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:46:06,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:46:11,658 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:46:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:11,918 INFO L93 Difference]: Finished difference Result 287 states and 319 transitions. [2021-11-22 14:46:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-22 14:46:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-22 14:46:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:11,921 INFO L225 Difference]: With dead ends: 287 [2021-11-22 14:46:11,921 INFO L226 Difference]: Without dead ends: 283 [2021-11-22 14:46:11,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=634, Invalid=2672, Unknown=0, NotChecked=0, Total=3306 [2021-11-22 14:46:11,923 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 273 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 153 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:11,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 334 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 844 Invalid, 7 Unknown, 0 Unchecked, 22.3s Time] [2021-11-22 14:46:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-22 14:46:11,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 134. [2021-11-22 14:46:11,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 1.121212121212121) internal successors, (148), 133 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2021-11-22 14:46:11,981 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 38 [2021-11-22 14:46:11,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:11,982 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2021-11-22 14:46:11,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2021-11-22 14:46:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-22 14:46:11,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:11,983 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:12,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 14:46:12,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-22 14:46:12,186 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 14:46:12,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:12,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1803528359, now seen corresponding path program 1 times [2021-11-22 14:46:12,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:12,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49893885] [2021-11-22 14:46:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:12,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:12,193 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:46:12,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999090402] [2021-11-22 14:46:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:12,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:46:12,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:46:12,200 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:46:12,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-22 14:46:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:12,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-22 14:46:12,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:46:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:12,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:46:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:13,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:13,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49893885] [2021-11-22 14:46:13,560 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:46:13,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999090402] [2021-11-22 14:46:13,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999090402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:46:13,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:46:13,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-22 14:46:13,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733164567] [2021-11-22 14:46:13,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:46:13,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 14:46:13,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:13,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 14:46:13,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-22 14:46:13,564 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:16,024 INFO L93 Difference]: Finished difference Result 389 states and 435 transitions. [2021-11-22 14:46:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-22 14:46:16,025 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2021-11-22 14:46:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:16,028 INFO L225 Difference]: With dead ends: 389 [2021-11-22 14:46:16,029 INFO L226 Difference]: Without dead ends: 387 [2021-11-22 14:46:16,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=421, Invalid=985, Unknown=0, NotChecked=0, Total=1406 [2021-11-22 14:46:16,031 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 290 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:16,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 145 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 204 Invalid, 0 Unknown, 50 Unchecked, 0.8s Time] [2021-11-22 14:46:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-22 14:46:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 210. [2021-11-22 14:46:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 208 states have (on average 1.1201923076923077) internal successors, (233), 209 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 233 transitions. [2021-11-22 14:46:16,124 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 233 transitions. Word has length 40 [2021-11-22 14:46:16,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:16,125 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 233 transitions. [2021-11-22 14:46:16,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 233 transitions. [2021-11-22 14:46:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-22 14:46:16,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:16,126 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] [2021-11-22 14:46:16,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-22 14:46:16,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 14:46:16,326 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)] === [2021-11-22 14:46:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1373561377, now seen corresponding path program 1 times [2021-11-22 14:46:16,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:16,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646615719] [2021-11-22 14:46:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:16,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:16,335 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:46:16,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472546418] [2021-11-22 14:46:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:16,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:46:16,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:46:16,342 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:46:16,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-22 14:46:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:16,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-22 14:46:16,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:46:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:18,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:46:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:46:26,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:26,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646615719] [2021-11-22 14:46:26,477 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:46:26,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472546418] [2021-11-22 14:46:26,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472546418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:46:26,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:46:26,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2021-11-22 14:46:26,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828128944] [2021-11-22 14:46:26,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:46:26,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-22 14:46:26,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:26,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-22 14:46:26,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 14:46:26,480 INFO L87 Difference]: Start difference. First operand 210 states and 233 transitions. Second operand has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 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) [2021-11-22 14:46:53,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:47:09,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:47:31,230 WARN L227 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 81 DAG size of output: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:47:52,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:47:54,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:48:06,754 WARN L227 SmtUtils]: Spent 5.76s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:48:09,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:48:48,850 WARN L227 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 82 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:49:10,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:49:12,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:49:20,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:49:35,249 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 [] [2021-11-22 14:49:53,115 WARN L227 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 71 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:49:58,632 WARN L227 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 74 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:50:27,833 WARN L227 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 74 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:50:27,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:27,836 INFO L93 Difference]: Finished difference Result 648 states and 717 transitions. [2021-11-22 14:50:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-22 14:50:27,836 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 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 44 [2021-11-22 14:50:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:27,841 INFO L225 Difference]: With dead ends: 648 [2021-11-22 14:50:27,841 INFO L226 Difference]: Without dead ends: 642 [2021-11-22 14:50:27,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7971 ImplicationChecksByTransitivity, 206.4s TimeCoverageRelationStatistics Valid=3569, Invalid=17893, Unknown=0, NotChecked=0, Total=21462 [2021-11-22 14:50:27,849 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 792 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 362 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:50:27,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 392 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 1332 Invalid, 6 Unknown, 0 Unchecked, 40.5s Time] [2021-11-22 14:50:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-22 14:50:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 453. [2021-11-22 14:50:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 451 states have (on average 1.1263858093126387) internal successors, (508), 452 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 508 transitions. [2021-11-22 14:50:28,108 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 508 transitions. Word has length 44 [2021-11-22 14:50:28,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:28,108 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 508 transitions. [2021-11-22 14:50:28,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 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) [2021-11-22 14:50:28,108 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 508 transitions. [2021-11-22 14:50:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-22 14:50:28,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:28,109 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] [2021-11-22 14:50:28,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-22 14:50:28,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 14:50:28,310 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)] === [2021-11-22 14:50:28,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:28,311 INFO L85 PathProgramCache]: Analyzing trace with hash 105118551, now seen corresponding path program 2 times [2021-11-22 14:50:28,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:50:28,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103132204] [2021-11-22 14:50:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:50:28,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:50:28,333 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:50:28,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92979276] [2021-11-22 14:50:28,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:50:28,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:50:28,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:50:28,335 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:50:28,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-22 14:50:28,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:50:28,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:50:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-22 14:50:28,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:50:31,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:50:34,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:50:34,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103132204] [2021-11-22 14:50:34,871 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:50:34,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92979276] [2021-11-22 14:50:34,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92979276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:50:34,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:50:34,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-11-22 14:50:34,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846752114] [2021-11-22 14:50:34,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:50:34,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-22 14:50:34,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:50:34,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-22 14:50:34,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-11-22 14:50:34,874 INFO L87 Difference]: Start difference. First operand 453 states and 508 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:52,013 WARN L227 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:50:58,483 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 [] [2021-11-22 14:51:06,848 WARN L227 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:51:39,720 WARN L227 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:52:11,126 WARN L227 SmtUtils]: Spent 7.67s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:52:19,671 WARN L227 SmtUtils]: Spent 7.70s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:52:29,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:52:35,697 WARN L227 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:52:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:52:47,077 INFO L93 Difference]: Finished difference Result 1156 states and 1282 transitions. [2021-11-22 14:52:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-22 14:52:47,077 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-22 14:52:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:52:47,083 INFO L225 Difference]: With dead ends: 1156 [2021-11-22 14:52:47,084 INFO L226 Difference]: Without dead ends: 937 [2021-11-22 14:52:47,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 113.4s TimeCoverageRelationStatistics Valid=2806, Invalid=7906, Unknown=0, NotChecked=0, Total=10712 [2021-11-22 14:52:47,089 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 675 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 277 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:52:47,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 387 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 903 Invalid, 1 Unknown, 0 Unchecked, 21.3s Time] [2021-11-22 14:52:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-11-22 14:52:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 532. [2021-11-22 14:52:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 530 states have (on average 1.120754716981132) internal successors, (594), 531 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 594 transitions. [2021-11-22 14:52:47,473 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 594 transitions. Word has length 52 [2021-11-22 14:52:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:52:47,473 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 594 transitions. [2021-11-22 14:52:47,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 594 transitions. [2021-11-22 14:52:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 14:52:47,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:52:47,475 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] [2021-11-22 14:52:47,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-22 14:52:47,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:52:47,675 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 14:52:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:52:47,676 INFO L85 PathProgramCache]: Analyzing trace with hash 984667412, now seen corresponding path program 3 times [2021-11-22 14:52:47,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:52:47,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920925222] [2021-11-22 14:52:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:52:47,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:52:47,709 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:52:47,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986386350] [2021-11-22 14:52:47,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:52:47,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:52:47,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:52:47,711 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:52:47,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-22 14:52:47,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 14:52:47,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:52:47,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-22 14:52:47,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:52:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-22 14:52:49,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:52:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-22 14:52:57,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:52:57,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920925222] [2021-11-22 14:52:57,946 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:52:57,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986386350] [2021-11-22 14:52:57,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986386350] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 14:52:57,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:52:57,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 28 [2021-11-22 14:52:57,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281457222] [2021-11-22 14:52:57,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:52:57,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 14:52:57,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:52:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 14:52:57,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-11-22 14:52:57,949 INFO L87 Difference]: Start difference. First operand 532 states and 594 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:53:05,811 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 [] [2021-11-22 14:53:11,835 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 [] [2021-11-22 14:53:17,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:53:17,365 INFO L93 Difference]: Finished difference Result 532 states and 594 transitions. [2021-11-22 14:53:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 14:53:17,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 14:53:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:53:17,369 INFO L225 Difference]: With dead ends: 532 [2021-11-22 14:53:17,369 INFO L226 Difference]: Without dead ends: 528 [2021-11-22 14:53:17,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=361, Invalid=1445, Unknown=0, NotChecked=0, Total=1806 [2021-11-22 14:53:17,371 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:53:17,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 81 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 165 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2021-11-22 14:53:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-11-22 14:53:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 200. [2021-11-22 14:53:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1155778894472361) internal successors, (222), 199 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:53:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2021-11-22 14:53:17,537 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 67 [2021-11-22 14:53:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:53:17,538 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2021-11-22 14:53:17,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:53:17,538 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2021-11-22 14:53:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 14:53:17,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:53:17,539 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:53:17,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-22 14:53:17,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:53:17,758 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-22 14:53:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:53:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash 811566907, now seen corresponding path program 2 times [2021-11-22 14:53:17,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:53:17,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119122584] [2021-11-22 14:53:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:53:17,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:53:17,768 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:53:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716995462] [2021-11-22 14:53:17,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:53:17,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:53:17,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:53:17,770 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:53:17,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-22 14:53:17,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:53:17,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:53:17,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 14:53:17,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:53:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:53:18,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:53:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 7 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:53:21,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:53:21,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119122584] [2021-11-22 14:53:21,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:53:21,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716995462] [2021-11-22 14:53:21,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716995462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:53:21,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:53:21,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-11-22 14:53:21,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749394223] [2021-11-22 14:53:21,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:53:21,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-22 14:53:21,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:53:21,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-22 14:53:21,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-11-22 14:53:21,204 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:53:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:53:31,232 INFO L93 Difference]: Finished difference Result 451 states and 499 transitions. [2021-11-22 14:53:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-22 14:53:31,233 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 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 80 [2021-11-22 14:53:31,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:53:31,233 INFO L225 Difference]: With dead ends: 451 [2021-11-22 14:53:31,233 INFO L226 Difference]: Without dead ends: 0 [2021-11-22 14:53:31,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=859, Invalid=1897, Unknown=0, NotChecked=0, Total=2756 [2021-11-22 14:53:31,235 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 360 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:53:31,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 318 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-22 14:53:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-22 14:53:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-22 14:53:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:53:31,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-22 14:53:31,237 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2021-11-22 14:53:31,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:53:31,238 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-22 14:53:31,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:53:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-22 14:53:31,238 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-22 14:53:31,241 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2021-11-22 14:53:31,242 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2021-11-22 14:53:31,242 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2021-11-22 14:53:31,242 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2021-11-22 14:53:31,242 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2021-11-22 14:53:31,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-22 14:53:31,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65aeff4-8ac9-479f-802b-5c915eb9ea7f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:53:31,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.