./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/indp1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY --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 9d155444443faf1f00dab96cdb68719b0ba1edb1979e11b3fea5d29001e4f12f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:44:12,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:44:12,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:44:12,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:44:12,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:44:12,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:44:12,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:44:12,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:44:12,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:44:12,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:44:12,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:44:12,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:44:12,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:44:12,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:44:12,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:44:12,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:44:12,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:44:12,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:44:12,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:44:12,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:44:12,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:44:12,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:44:12,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:44:12,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:44:12,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:44:12,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:44:12,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:44:12,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:44:12,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:44:12,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:44:12,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:44:12,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:44:12,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:44:12,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:44:12,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:44:12,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:44:12,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:44:12,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:44:12,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:44:12,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:44:12,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:44:12,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:44:12,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:44:12,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:44:12,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:44:12,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:44:12,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:44:12,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:44:12,703 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:44:12,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:44:12,703 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:44:12,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:44:12,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:44:12,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:44:12,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:44:12,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:44:12,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:44:12,706 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:44:12,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:44:12,707 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:44:12,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:44:12,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:44:12,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:44:12,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:44:12,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:44:12,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:44:12,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:44:12,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:44:12,709 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:44:12,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:44:12,710 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:44:12,712 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:44:12,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:44:12,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:44:12,713 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_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d155444443faf1f00dab96cdb68719b0ba1edb1979e11b3fea5d29001e4f12f [2021-11-07 08:44:13,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:44:13,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:44:13,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:44:13,097 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:44:13,098 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:44:13,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-fpi/indp1.c [2021-11-07 08:44:13,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/data/84e9a1ce3/08ad038c3a404ad6bae379fe7a42a2a2/FLAG287e7ddca [2021-11-07 08:44:13,785 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:44:13,786 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/sv-benchmarks/c/array-fpi/indp1.c [2021-11-07 08:44:13,793 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/data/84e9a1ce3/08ad038c3a404ad6bae379fe7a42a2a2/FLAG287e7ddca [2021-11-07 08:44:14,174 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/data/84e9a1ce3/08ad038c3a404ad6bae379fe7a42a2a2 [2021-11-07 08:44:14,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:44:14,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:44:14,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:44:14,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:44:14,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:44:14,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474486ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14, skipping insertion in model container [2021-11-07 08:44:14,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:44:14,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:44:14,402 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/sv-benchmarks/c/array-fpi/indp1.c[588,601] [2021-11-07 08:44:14,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:44:14,431 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:44:14,445 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/sv-benchmarks/c/array-fpi/indp1.c[588,601] [2021-11-07 08:44:14,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:44:14,468 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:44:14,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14 WrapperNode [2021-11-07 08:44:14,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:44:14,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:44:14,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:44:14,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:44:14,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:44:14,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:44:14,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:44:14,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:44:14,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:44:14,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:44:14,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:44:14,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:44:14,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14" (1/1) ... [2021-11-07 08:44:14,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:44:14,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:14,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:44:14,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:44:14,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:44:14,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:44:14,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:44:14,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:44:14,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:44:14,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:44:14,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:44:14,925 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:44:14,926 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-07 08:44:14,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:44:14 BoogieIcfgContainer [2021-11-07 08:44:14,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:44:14,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:44:14,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:44:14,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:44:14,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:44:14" (1/3) ... [2021-11-07 08:44:14,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6805bd1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:44:14, skipping insertion in model container [2021-11-07 08:44:14,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:44:14" (2/3) ... [2021-11-07 08:44:14,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6805bd1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:44:14, skipping insertion in model container [2021-11-07 08:44:14,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:44:14" (3/3) ... [2021-11-07 08:44:14,938 INFO L111 eAbstractionObserver]: Analyzing ICFG indp1.c [2021-11-07 08:44:14,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:44:14,944 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:44:14,994 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:44:15,002 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 [2021-11-07 08:44:15,002 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:44:15,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:44:15,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:15,051 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:15,052 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:15,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:15,062 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2021-11-07 08:44:15,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:15,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310026354] [2021-11-07 08:44:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:15,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:44:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:44:15,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:15,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310026354] [2021-11-07 08:44:15,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310026354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:44:15,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:44:15,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:44:15,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454831836] [2021-11-07 08:44:15,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:44:15,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:15,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:44:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:44:15,405 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:15,440 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-11-07 08:44:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:44:15,442 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 08:44:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:15,454 INFO L225 Difference]: With dead ends: 44 [2021-11-07 08:44:15,455 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 08:44:15,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:44:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 08:44:15,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-07 08:44:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2021-11-07 08:44:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-07 08:44:15,497 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2021-11-07 08:44:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:15,498 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-07 08:44:15,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-07 08:44:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:44:15,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:15,501 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:15,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:44:15,503 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2021-11-07 08:44:15,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:15,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767817799] [2021-11-07 08:44:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:15,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:44:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:44:15,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:15,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767817799] [2021-11-07 08:44:15,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767817799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:44:15,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:44:15,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:44:15,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938938291] [2021-11-07 08:44:15,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:44:15,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:15,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:44:15,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:44:15,644 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:15,756 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-11-07 08:44:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:44:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 08:44:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:15,760 INFO L225 Difference]: With dead ends: 45 [2021-11-07 08:44:15,760 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 08:44:15,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:44:15,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 08:44:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-07 08:44:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:15,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-07 08:44:15,770 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-07 08:44:15,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:15,771 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-07 08:44:15,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:15,771 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-07 08:44:15,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:44:15,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:15,773 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:15,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:44:15,773 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:15,774 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2021-11-07 08:44:15,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:15,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521751972] [2021-11-07 08:44:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:15,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:15,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:15,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566463914] [2021-11-07 08:44:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:15,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:15,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:15,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:15,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:44:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:44:15,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:44:15,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:16,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 08:44:16,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 08:44:16,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 08:44:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:44:16,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:16,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521751972] [2021-11-07 08:44:16,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:16,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566463914] [2021-11-07 08:44:16,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566463914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:16,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:16,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-07 08:44:16,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724975896] [2021-11-07 08:44:16,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:44:16,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:16,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:44:16,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:44:16,303 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:16,431 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-11-07 08:44:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:44:16,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 08:44:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:16,434 INFO L225 Difference]: With dead ends: 55 [2021-11-07 08:44:16,434 INFO L226 Difference]: Without dead ends: 53 [2021-11-07 08:44:16,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:44:16,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-07 08:44:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2021-11-07 08:44:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-07 08:44:16,443 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2021-11-07 08:44:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:16,444 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-07 08:44:16,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:16,445 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-07 08:44:16,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:44:16,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:16,446 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:16,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:16,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:16,660 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:16,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:16,661 INFO L85 PathProgramCache]: Analyzing trace with hash 859342364, now seen corresponding path program 2 times [2021-11-07 08:44:16,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:16,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693540383] [2021-11-07 08:44:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:16,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:16,684 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:16,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897975211] [2021-11-07 08:44:16,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:44:16,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:16,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:16,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:16,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:44:16,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:44:16,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:44:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:44:16,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:16,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693540383] [2021-11-07 08:44:16,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:16,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897975211] [2021-11-07 08:44:16,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897975211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:16,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:16,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 08:44:16,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407351485] [2021-11-07 08:44:16,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:44:16,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:16,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:44:16,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:44:16,944 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:17,152 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-11-07 08:44:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:44:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 08:44:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:17,157 INFO L225 Difference]: With dead ends: 81 [2021-11-07 08:44:17,158 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 08:44:17,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:44:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 08:44:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2021-11-07 08:44:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-07 08:44:17,181 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2021-11-07 08:44:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:17,182 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-07 08:44:17,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-07 08:44:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:44:17,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:17,185 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:17,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:17,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:17,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:17,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash 803751580, now seen corresponding path program 3 times [2021-11-07 08:44:17,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:17,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479688691] [2021-11-07 08:44:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:17,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:17,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:17,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402923021] [2021-11-07 08:44:17,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:44:17,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:17,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:17,443 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:17,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:44:17,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:44:17,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:44:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:44:17,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:17,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479688691] [2021-11-07 08:44:17,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:17,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402923021] [2021-11-07 08:44:17,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402923021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:17,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:17,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 08:44:17,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713166661] [2021-11-07 08:44:17,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:44:17,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:17,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:44:17,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:44:17,696 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:17,837 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-11-07 08:44:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:44:17,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 08:44:17,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:17,846 INFO L225 Difference]: With dead ends: 52 [2021-11-07 08:44:17,847 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 08:44:17,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:44:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 08:44:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-11-07 08:44:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-07 08:44:17,858 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2021-11-07 08:44:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:17,858 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-07 08:44:17,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-07 08:44:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:44:17,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:17,863 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:17,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:18,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:18,083 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:18,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:18,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1304966232, now seen corresponding path program 4 times [2021-11-07 08:44:18,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:18,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021522610] [2021-11-07 08:44:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:18,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:18,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:18,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014790572] [2021-11-07 08:44:18,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:44:18,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:18,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:18,100 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:18,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:44:18,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:44:18,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:44:18,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:18,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:18,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:44:18,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 08:44:18,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:18,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,581 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 08:44:18,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 130 [2021-11-07 08:44:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:18,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 40 [2021-11-07 08:44:18,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:44:18,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2021-11-07 08:44:18,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:18,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,900 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 08:44:18,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 124 [2021-11-07 08:44:18,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:18,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:18,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 38 [2021-11-07 08:44:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:19,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:44:19,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2021-11-07 08:44:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:44:19,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:19,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021522610] [2021-11-07 08:44:19,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:19,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014790572] [2021-11-07 08:44:19,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014790572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:19,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:19,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-07 08:44:19,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289273851] [2021-11-07 08:44:19,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:44:19,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:19,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:44:19,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:44:19,151 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:19,468 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-11-07 08:44:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:44:19,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 08:44:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:19,469 INFO L225 Difference]: With dead ends: 61 [2021-11-07 08:44:19,469 INFO L226 Difference]: Without dead ends: 59 [2021-11-07 08:44:19,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:44:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-07 08:44:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2021-11-07 08:44:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-11-07 08:44:19,477 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 26 [2021-11-07 08:44:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:19,477 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-11-07 08:44:19,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-11-07 08:44:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:44:19,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:19,479 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:19,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:19,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:19,680 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1587482582, now seen corresponding path program 5 times [2021-11-07 08:44:19,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:19,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419940011] [2021-11-07 08:44:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:19,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:19,691 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:19,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132651393] [2021-11-07 08:44:19,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:44:19,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:19,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:19,693 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:19,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:44:20,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-07 08:44:20,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:20,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:44:20,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:44:20,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:20,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419940011] [2021-11-07 08:44:20,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:20,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132651393] [2021-11-07 08:44:20,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132651393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:20,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:20,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:44:20,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497952530] [2021-11-07 08:44:20,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:44:20,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:20,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:44:20,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:44:20,877 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:21,015 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-11-07 08:44:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:44:21,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 08:44:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:21,017 INFO L225 Difference]: With dead ends: 111 [2021-11-07 08:44:21,017 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 08:44:21,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:44:21,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 08:44:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2021-11-07 08:44:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-07 08:44:21,036 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 28 [2021-11-07 08:44:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:21,036 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-07 08:44:21,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-07 08:44:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:44:21,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:21,037 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:21,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:21,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-07 08:44:21,238 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:21,238 INFO L85 PathProgramCache]: Analyzing trace with hash -227434410, now seen corresponding path program 6 times [2021-11-07 08:44:21,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:21,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754520316] [2021-11-07 08:44:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:21,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:21,250 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:21,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221361743] [2021-11-07 08:44:21,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:44:21,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:21,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:21,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:21,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:44:21,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-07 08:44:21,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:21,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:44:21,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:44:21,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:21,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754520316] [2021-11-07 08:44:21,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:21,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221361743] [2021-11-07 08:44:21,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221361743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:21,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:21,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:44:21,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721564672] [2021-11-07 08:44:21,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:44:21,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:44:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:44:21,569 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:21,733 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2021-11-07 08:44:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:44:21,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 08:44:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:21,734 INFO L225 Difference]: With dead ends: 70 [2021-11-07 08:44:21,734 INFO L226 Difference]: Without dead ends: 55 [2021-11-07 08:44:21,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:44:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-07 08:44:21,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2021-11-07 08:44:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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) [2021-11-07 08:44:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-11-07 08:44:21,739 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 28 [2021-11-07 08:44:21,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:21,740 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-11-07 08:44:21,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:21,740 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-11-07 08:44:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 08:44:21,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:21,741 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:21,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:21,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:21,942 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:21,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1505554158, now seen corresponding path program 7 times [2021-11-07 08:44:21,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:21,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166348265] [2021-11-07 08:44:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:21,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:21,952 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:21,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986438733] [2021-11-07 08:44:21,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:44:21,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:21,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:21,954 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:21,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:44:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:44:22,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 08:44:22,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:22,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:22,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:44:22,340 INFO L354 Elim1Store]: treesize reduction 118, result has 20.8 percent of original size [2021-11-07 08:44:22,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 94 [2021-11-07 08:44:22,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:22,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 25 [2021-11-07 08:44:22,451 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-07 08:44:22,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-07 08:44:22,632 INFO L354 Elim1Store]: treesize reduction 498, result has 12.5 percent of original size [2021-11-07 08:44:22,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 107 treesize of output 138 [2021-11-07 08:44:22,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:22,710 INFO L354 Elim1Store]: treesize reduction 146, result has 2.0 percent of original size [2021-11-07 08:44:22,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 68 [2021-11-07 08:44:22,887 INFO L354 Elim1Store]: treesize reduction 500, result has 12.1 percent of original size [2021-11-07 08:44:22,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 107 treesize of output 136 [2021-11-07 08:44:22,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:22,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:22,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:22,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:22,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:22,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:22,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:22,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:22,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:22,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 54 [2021-11-07 08:44:23,056 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-11-07 08:44:23,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 37 [2021-11-07 08:44:23,264 INFO L354 Elim1Store]: treesize reduction 492, result has 11.0 percent of original size [2021-11-07 08:44:23,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 103 treesize of output 124 [2021-11-07 08:44:23,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2021-11-07 08:44:23,476 INFO L354 Elim1Store]: treesize reduction 494, result has 10.7 percent of original size [2021-11-07 08:44:23,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 103 treesize of output 122 [2021-11-07 08:44:23,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:23,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:23,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 41 [2021-11-07 08:44:23,656 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-11-07 08:44:23,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 37 [2021-11-07 08:44:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:44:23,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:23,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166348265] [2021-11-07 08:44:23,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:23,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986438733] [2021-11-07 08:44:23,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986438733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:23,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:23,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-07 08:44:23,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800342190] [2021-11-07 08:44:23,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:44:23,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:23,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:44:23,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:44:23,821 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:24,450 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-11-07 08:44:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:44:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 08:44:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:24,451 INFO L225 Difference]: With dead ends: 77 [2021-11-07 08:44:24,451 INFO L226 Difference]: Without dead ends: 75 [2021-11-07 08:44:24,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:44:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-07 08:44:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2021-11-07 08:44:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-11-07 08:44:24,458 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 32 [2021-11-07 08:44:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:24,458 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-11-07 08:44:24,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-11-07 08:44:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 08:44:24,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:24,460 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:24,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:24,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:24,672 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:24,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2083150320, now seen corresponding path program 8 times [2021-11-07 08:44:24,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:24,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67983304] [2021-11-07 08:44:24,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:24,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:24,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:24,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713035029] [2021-11-07 08:44:24,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:44:24,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:24,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:24,692 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:24,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:44:24,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:44:24,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:24,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:44:24,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:44:25,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:25,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67983304] [2021-11-07 08:44:25,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:25,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713035029] [2021-11-07 08:44:25,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713035029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:25,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:25,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-07 08:44:25,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522917907] [2021-11-07 08:44:25,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:44:25,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:25,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:44:25,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:44:25,044 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-11-07 08:44:25,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:25,238 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2021-11-07 08:44:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:44:25,238 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 34 [2021-11-07 08:44:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:25,240 INFO L225 Difference]: With dead ends: 137 [2021-11-07 08:44:25,240 INFO L226 Difference]: Without dead ends: 117 [2021-11-07 08:44:25,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:44:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-07 08:44:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 83. [2021-11-07 08:44:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-11-07 08:44:25,250 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 34 [2021-11-07 08:44:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:25,250 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-11-07 08:44:25,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-11-07 08:44:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-11-07 08:44:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 08:44:25,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:25,252 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:25,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:25,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:44:25,464 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:25,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:25,464 INFO L85 PathProgramCache]: Analyzing trace with hash 526321296, now seen corresponding path program 9 times [2021-11-07 08:44:25,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:25,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106725152] [2021-11-07 08:44:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:25,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:25,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:25,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192775240] [2021-11-07 08:44:25,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:44:25,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:25,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:25,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:25,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:44:25,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 08:44:25,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:44:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:44:26,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:26,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106725152] [2021-11-07 08:44:26,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:26,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192775240] [2021-11-07 08:44:26,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192775240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:26,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:26,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-07 08:44:26,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169903277] [2021-11-07 08:44:26,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:44:26,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:26,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:44:26,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:44:26,129 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-11-07 08:44:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:26,371 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2021-11-07 08:44:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:44:26,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 34 [2021-11-07 08:44:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:26,373 INFO L225 Difference]: With dead ends: 117 [2021-11-07 08:44:26,373 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 08:44:26,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:44:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 08:44:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-11-07 08:44:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-11-07 08:44:26,381 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 34 [2021-11-07 08:44:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:26,381 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-11-07 08:44:26,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-11-07 08:44:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-11-07 08:44:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:44:26,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:26,383 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:26,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:26,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:44:26,596 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:26,596 INFO L85 PathProgramCache]: Analyzing trace with hash -389301684, now seen corresponding path program 10 times [2021-11-07 08:44:26,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:26,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936128923] [2021-11-07 08:44:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:26,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:26,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:26,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837276266] [2021-11-07 08:44:26,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:44:26,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:26,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:26,608 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:26,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:44:27,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:44:27,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:27,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 08:44:27,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:27,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:44:27,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:27,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 76 [2021-11-07 08:44:27,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 17 [2021-11-07 08:44:27,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:44:27,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 111 [2021-11-07 08:44:27,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 37 [2021-11-07 08:44:27,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:44:27,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-07 08:44:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:27,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,636 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 08:44:27,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 172 [2021-11-07 08:44:27,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:27,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:27,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 59 [2021-11-07 08:44:27,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,827 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 08:44:27,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 172 [2021-11-07 08:44:27,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:27,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:27,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 63 [2021-11-07 08:44:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:28,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,044 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 08:44:28,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 172 [2021-11-07 08:44:28,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 64 [2021-11-07 08:44:28,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:44:28,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 49 [2021-11-07 08:44:28,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:28,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,430 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 08:44:28,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 166 [2021-11-07 08:44:28,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:28,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 55 [2021-11-07 08:44:28,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:28,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,665 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 08:44:28,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 166 [2021-11-07 08:44:28,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:28,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:28,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 63 [2021-11-07 08:44:28,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:28,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,921 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 08:44:28,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 166 [2021-11-07 08:44:28,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:28,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:44:28,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:28,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 60 [2021-11-07 08:44:29,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:29,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:29,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:29,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:29,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:29,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:29,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:44:29,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 49 [2021-11-07 08:44:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:44:29,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:29,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936128923] [2021-11-07 08:44:29,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:29,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837276266] [2021-11-07 08:44:29,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837276266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:29,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:29,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-07 08:44:29,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327332196] [2021-11-07 08:44:29,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:44:29,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:44:29,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:44:29,389 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:42,227 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-11-07 08:44:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:44:42,230 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 08:44:42,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:42,230 INFO L225 Difference]: With dead ends: 108 [2021-11-07 08:44:42,230 INFO L226 Difference]: Without dead ends: 106 [2021-11-07 08:44:42,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:44:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-07 08:44:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2021-11-07 08:44:42,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2021-11-07 08:44:42,241 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 38 [2021-11-07 08:44:42,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:42,242 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2021-11-07 08:44:42,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2021-11-07 08:44:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:44:42,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:42,244 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:42,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:42,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:44:42,464 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash -441278722, now seen corresponding path program 1 times [2021-11-07 08:44:42,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:42,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72693899] [2021-11-07 08:44:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:42,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:42,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:42,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785112075] [2021-11-07 08:44:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:42,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:42,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:42,482 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:42,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:44:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:44:42,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 08:44:42,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:43,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:44:43,160 INFO L354 Elim1Store]: treesize reduction 245, result has 15.8 percent of original size [2021-11-07 08:44:43,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 91 treesize of output 107 [2021-11-07 08:44:43,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:43,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 41 [2021-11-07 08:44:43,300 INFO L354 Elim1Store]: treesize reduction 245, result has 15.8 percent of original size [2021-11-07 08:44:43,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 91 treesize of output 107 [2021-11-07 08:44:43,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 41 [2021-11-07 08:44:43,426 INFO L354 Elim1Store]: treesize reduction 264, result has 9.3 percent of original size [2021-11-07 08:44:43,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 91 treesize of output 88 [2021-11-07 08:44:43,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:44:43,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2021-11-07 08:44:43,588 INFO L354 Elim1Store]: treesize reduction 237, result has 16.3 percent of original size [2021-11-07 08:44:43,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 87 treesize of output 103 [2021-11-07 08:44:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 41 [2021-11-07 08:44:43,697 INFO L354 Elim1Store]: treesize reduction 237, result has 16.3 percent of original size [2021-11-07 08:44:43,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 87 treesize of output 103 [2021-11-07 08:44:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 39 [2021-11-07 08:44:43,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-07 08:44:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:44:43,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:43,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72693899] [2021-11-07 08:44:43,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:43,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785112075] [2021-11-07 08:44:43,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785112075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:43,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:43,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-07 08:44:43,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127429291] [2021-11-07 08:44:43,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:44:43,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:43,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:44:43,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:44:43,945 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:44,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:44,343 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2021-11-07 08:44:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:44:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 08:44:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:44,357 INFO L225 Difference]: With dead ends: 117 [2021-11-07 08:44:44,357 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 08:44:44,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:44:44,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 08:44:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-11-07 08:44:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-11-07 08:44:44,365 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 40 [2021-11-07 08:44:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:44,365 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-11-07 08:44:44,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-11-07 08:44:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:44:44,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:44,366 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:44,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:44,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 08:44:44,580 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:44,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1188620490, now seen corresponding path program 11 times [2021-11-07 08:44:44,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:44,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538118452] [2021-11-07 08:44:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:44,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:44,591 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:44,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027332331] [2021-11-07 08:44:44,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:44:44,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:44,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:44,593 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:44,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2fa68f-1d7e-44da-9794-a4887b44ae2f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process