./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn5f.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_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/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_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn5f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/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_30acdb8f-de7e-4103-94eb-d2274ae50262/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 d9916de8363461179d8fb51bbbca62f9fac89d50ba7961a3d354541c45153780 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:41:16,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:41:16,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:41:16,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:41:16,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:41:16,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:41:16,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:41:16,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:41:16,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:41:16,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:41:16,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:41:16,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:41:16,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:41:16,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:41:16,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:41:16,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:41:16,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:41:16,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:41:16,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:41:16,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:41:16,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:41:16,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:41:16,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:41:16,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:41:16,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:41:16,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:41:16,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:41:16,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:41:16,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:41:16,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:41:16,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:41:16,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:41:16,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:41:16,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:41:16,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:41:16,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:41:16,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:41:16,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:41:16,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:41:16,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:41:16,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:41:16,765 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:41:16,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:41:16,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:41:16,810 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:41:16,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:41:16,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:41:16,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:41:16,818 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:41:16,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:41:16,818 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:41:16,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:41:16,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:41:16,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:41:16,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:41:16,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:41:16,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:41:16,821 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:41:16,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:41:16,821 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:41:16,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:41:16,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:41:16,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:41:16,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:41:16,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:41:16,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:41:16,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:41:16,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:41:16,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:41:16,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:41:16,823 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:41:16,824 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:41:16,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:41:16,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:41:16,825 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_30acdb8f-de7e-4103-94eb-d2274ae50262/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9916de8363461179d8fb51bbbca62f9fac89d50ba7961a3d354541c45153780 [2021-11-07 08:41:17,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:41:17,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:41:17,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:41:17,136 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:41:17,137 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:41:17,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-fpi/eqn5f.c [2021-11-07 08:41:17,214 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/data/956d206bd/87bf8bc6787c4eb0837116b84c674386/FLAG7c7318d51 [2021-11-07 08:41:17,764 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:41:17,767 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/sv-benchmarks/c/array-fpi/eqn5f.c [2021-11-07 08:41:17,779 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/data/956d206bd/87bf8bc6787c4eb0837116b84c674386/FLAG7c7318d51 [2021-11-07 08:41:18,114 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/data/956d206bd/87bf8bc6787c4eb0837116b84c674386 [2021-11-07 08:41:18,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:41:18,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:41:18,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:41:18,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:41:18,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:41:18,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61815b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18, skipping insertion in model container [2021-11-07 08:41:18,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:41:18,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:41:18,340 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_30acdb8f-de7e-4103-94eb-d2274ae50262/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2021-11-07 08:41:18,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:41:18,384 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:41:18,399 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_30acdb8f-de7e-4103-94eb-d2274ae50262/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2021-11-07 08:41:18,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:41:18,441 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:41:18,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18 WrapperNode [2021-11-07 08:41:18,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:41:18,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:41:18,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:41:18,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:41:18,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:41:18,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:41:18,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:41:18,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:41:18,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:41:18,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:41:18,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:41:18,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:41:18,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18" (1/1) ... [2021-11-07 08:41:18,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:41:18,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:18,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:41:18,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:41:18,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:41:18,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:41:18,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:41:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:41:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:41:18,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:41:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:41:18,982 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:41:18,982 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-07 08:41:18,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:41:18 BoogieIcfgContainer [2021-11-07 08:41:18,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:41:18,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:41:18,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:41:18,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:41:18,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:41:18" (1/3) ... [2021-11-07 08:41:18,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49185b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:41:18, skipping insertion in model container [2021-11-07 08:41:18,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:18" (2/3) ... [2021-11-07 08:41:18,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49185b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:41:18, skipping insertion in model container [2021-11-07 08:41:18,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:41:18" (3/3) ... [2021-11-07 08:41:18,994 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2021-11-07 08:41:18,999 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:41:19,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:41:19,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:41:19,069 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 08:41:19,069 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:41:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:41:19,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:19,099 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:19,100 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:19,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-11-07 08:41:19,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:19,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074999634] [2021-11-07 08:41:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:19,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:19,358 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 08:41:19,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:19,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074999634] [2021-11-07 08:41:19,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074999634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:19,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:19,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:41:19,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599050665] [2021-11-07 08:41:19,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:41:19,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:41:19,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:41:19,403 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:19,420 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-07 08:41:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:41:19,421 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 08:41:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:19,430 INFO L225 Difference]: With dead ends: 38 [2021-11-07 08:41:19,431 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 08:41:19,434 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 08:41:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 08:41:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 08:41:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-07 08:41:19,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-07 08:41:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:19,494 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-07 08:41:19,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:19,495 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-07 08:41:19,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:41:19,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:19,496 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:19,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:41:19,497 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:19,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:19,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-11-07 08:41:19,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:19,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342877625] [2021-11-07 08:41:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:19,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:19,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:41:19,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221227318] [2021-11-07 08:41:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:19,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:19,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:19,526 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:19,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:41:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:19,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:41:19,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:19,681 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:41:19,682 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 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-07 08:41:19,832 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 08:41:19,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:19,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342877625] [2021-11-07 08:41:19,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:41:19,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221227318] [2021-11-07 08:41:19,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221227318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:19,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:19,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:41:19,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491656716] [2021-11-07 08:41:19,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:41:19,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:19,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:41:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:41:19,837 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:19,913 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-07 08:41:19,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:41:19,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 08:41:19,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:19,914 INFO L225 Difference]: With dead ends: 34 [2021-11-07 08:41:19,915 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 08:41:19,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:41:19,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 08:41:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-07 08:41:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-07 08:41:19,921 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-07 08:41:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:19,922 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-07 08:41:19,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-07 08:41:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:41:19,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:19,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:19,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:20,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:20,138 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:20,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-11-07 08:41:20,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:20,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724807785] [2021-11-07 08:41:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:20,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:20,161 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:41:20,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541864524] [2021-11-07 08:41:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:20,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:20,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:20,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:20,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:41:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:20,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:41:20,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:20,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:20,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724807785] [2021-11-07 08:41:20,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:41:20,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541864524] [2021-11-07 08:41:20,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541864524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:20,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:20,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:41:20,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969662447] [2021-11-07 08:41:20,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:41:20,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:20,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:41:20,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:41:20,290 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 08:41:20,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:20,356 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-07 08:41:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:41:20,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 08:41:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:20,357 INFO L225 Difference]: With dead ends: 49 [2021-11-07 08:41:20,358 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 08:41:20,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:41:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 08:41:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-11-07 08:41:20,363 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 08:41:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-07 08:41:20,364 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-07 08:41:20,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:20,364 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-07 08:41:20,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 08:41:20,364 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-07 08:41:20,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:41:20,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:20,365 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:20,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:20,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:20,595 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:20,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:20,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-11-07 08:41:20,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:20,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648335986] [2021-11-07 08:41:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:20,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:20,617 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:41:20,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825403885] [2021-11-07 08:41:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:20,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:20,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:20,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:20,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:41:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:20,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:41:20,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:20,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:20,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648335986] [2021-11-07 08:41:20,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:41:20,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825403885] [2021-11-07 08:41:20,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825403885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:20,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:41:20,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-07 08:41:20,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882172319] [2021-11-07 08:41:20,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:41:20,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:20,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:41:20,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:41:20,818 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 08:41:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:20,907 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-07 08:41:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:41:20,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 08:41:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:20,909 INFO L225 Difference]: With dead ends: 44 [2021-11-07 08:41:20,909 INFO L226 Difference]: Without dead ends: 37 [2021-11-07 08:41:20,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:41:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-07 08:41:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-11-07 08:41:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-07 08:41:20,915 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-11-07 08:41:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:20,915 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-07 08:41:20,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 08:41:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-07 08:41:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:41:20,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:20,917 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:20,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:21,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:21,118 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:21,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:21,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-11-07 08:41:21,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:21,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700767650] [2021-11-07 08:41:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:21,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:21,141 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:41:21,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577032243] [2021-11-07 08:41:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:21,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:21,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:21,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:21,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:41:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:21,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:41:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:21,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:21,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700767650] [2021-11-07 08:41:21,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:41:21,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577032243] [2021-11-07 08:41:21,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577032243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:21,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:21,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:41:21,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906437740] [2021-11-07 08:41:21,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:41:21,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:21,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:41:21,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:41:21,321 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:21,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:21,383 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-07 08:41:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:41:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 08:41:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:21,384 INFO L225 Difference]: With dead ends: 41 [2021-11-07 08:41:21,384 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 08:41:21,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:41:21,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 08:41:21,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-07 08:41:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:21,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-07 08:41:21,389 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-07 08:41:21,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:21,389 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-07 08:41:21,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-07 08:41:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:41:21,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:21,390 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:21,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:21,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:21,610 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:21,610 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-11-07 08:41:21,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:21,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741432677] [2021-11-07 08:41:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:21,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:21,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:41:21,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811440603] [2021-11-07 08:41:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:21,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:21,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:21,658 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:21,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:41:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:21,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:41:21,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:21,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-07 08:41:21,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-07 08:41:21,903 INFO L354 Elim1Store]: treesize reduction 74, result has 26.0 percent of original size [2021-11-07 08:41:21,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 52 [2021-11-07 08:41:22,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:22,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741432677] [2021-11-07 08:41:22,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:41:22,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811440603] [2021-11-07 08:41:22,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 08:41:22,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:22,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 08:41:22,133 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-07 08:41:22,134 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 08:41:22,142 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:41:22,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:22,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 08:41:22,373 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-11-07 08:41:22,375 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:41:22,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:41:22 BoogieIcfgContainer [2021-11-07 08:41:22,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:41:22,394 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:41:22,394 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:41:22,394 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:41:22,395 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:41:18" (3/4) ... [2021-11-07 08:41:22,399 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 08:41:22,399 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:41:22,401 INFO L168 Benchmark]: Toolchain (without parser) took 4280.74 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 71.8 MB in the beginning and 56.9 MB in the end (delta: 14.8 MB). Peak memory consumption was 38.9 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:22,401 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 109.1 MB. Free memory is still 88.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:41:22,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.23 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 84.3 MB in the end (delta: -12.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:22,413 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.82 ms. Allocated memory is still 109.1 MB. Free memory was 84.3 MB in the beginning and 82.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:22,414 INFO L168 Benchmark]: Boogie Preprocessor took 53.21 ms. Allocated memory is still 109.1 MB. Free memory was 82.7 MB in the beginning and 81.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:22,414 INFO L168 Benchmark]: RCFGBuilder took 424.94 ms. Allocated memory is still 109.1 MB. Free memory was 81.3 MB in the beginning and 70.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:22,415 INFO L168 Benchmark]: TraceAbstraction took 3406.83 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 70.4 MB in the beginning and 58.0 MB in the end (delta: 12.4 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:22,416 INFO L168 Benchmark]: Witness Printer took 5.22 ms. Allocated memory is still 134.2 MB. Free memory was 58.0 MB in the beginning and 56.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:41:22,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 109.1 MB. Free memory is still 88.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 322.23 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 84.3 MB in the end (delta: -12.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.82 ms. Allocated memory is still 109.1 MB. Free memory was 84.3 MB in the beginning and 82.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.21 ms. Allocated memory is still 109.1 MB. Free memory was 82.7 MB in the beginning and 81.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 424.94 ms. Allocated memory is still 109.1 MB. Free memory was 81.3 MB in the beginning and 70.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3406.83 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 70.4 MB in the beginning and 58.0 MB in the end (delta: 12.4 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. * Witness Printer took 5.22 ms. Allocated memory is still 134.2 MB. Free memory was 58.0 MB in the beginning and 56.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 1 [L32] b[0] = 1 [L33] i=1 [L33] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/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 -> d9916de8363461179d8fb51bbbca62f9fac89d50ba7961a3d354541c45153780 [2021-11-07 08:41:25,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:41:25,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:41:25,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:41:25,649 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:41:25,649 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:41:25,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-fpi/eqn5f.c [2021-11-07 08:41:25,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/data/ea80522a3/a070b3ee891e41c09696588a947f7a27/FLAGd3e373386 [2021-11-07 08:41:26,186 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:41:26,186 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/sv-benchmarks/c/array-fpi/eqn5f.c [2021-11-07 08:41:26,193 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/data/ea80522a3/a070b3ee891e41c09696588a947f7a27/FLAGd3e373386 [2021-11-07 08:41:26,210 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/data/ea80522a3/a070b3ee891e41c09696588a947f7a27 [2021-11-07 08:41:26,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:41:26,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:41:26,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:41:26,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:41:26,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:41:26,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b31a264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26, skipping insertion in model container [2021-11-07 08:41:26,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:41:26,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:41:26,401 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_30acdb8f-de7e-4103-94eb-d2274ae50262/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2021-11-07 08:41:26,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:41:26,439 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:41:26,474 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_30acdb8f-de7e-4103-94eb-d2274ae50262/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2021-11-07 08:41:26,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:41:26,521 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:41:26,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26 WrapperNode [2021-11-07 08:41:26,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:41:26,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:41:26,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:41:26,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:41:26,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:41:26,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:41:26,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:41:26,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:41:26,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:41:26,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:41:26,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:41:26,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:41:26,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26" (1/1) ... [2021-11-07 08:41:26,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:41:26,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:26,699 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:41:26,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:41:26,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 08:41:26,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:41:26,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 08:41:26,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:41:26,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:41:26,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:41:26,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 08:41:27,200 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:41:27,200 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-07 08:41:27,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:41:27 BoogieIcfgContainer [2021-11-07 08:41:27,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:41:27,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:41:27,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:41:27,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:41:27,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:41:26" (1/3) ... [2021-11-07 08:41:27,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c58ccce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:41:27, skipping insertion in model container [2021-11-07 08:41:27,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:41:26" (2/3) ... [2021-11-07 08:41:27,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c58ccce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:41:27, skipping insertion in model container [2021-11-07 08:41:27,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:41:27" (3/3) ... [2021-11-07 08:41:27,236 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2021-11-07 08:41:27,243 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:41:27,243 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:41:27,305 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:41:27,311 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 08:41:27,312 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:41:27,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:41:27,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:27,333 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:27,333 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:27,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-11-07 08:41:27,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:41:27,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679166358] [2021-11-07 08:41:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:27,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:41:27,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:41:27,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:41:27,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 08:41:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:27,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 08:41:27,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:27,573 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 08:41:27,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:41:27,641 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 08:41:27,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:41:27,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679166358] [2021-11-07 08:41:27,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679166358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:27,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:27,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 08:41:27,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423397715] [2021-11-07 08:41:27,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:41:27,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:41:27,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:41:27,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:41:27,671 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:27,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:27,689 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-07 08:41:27,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:41:27,690 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 08:41:27,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:27,699 INFO L225 Difference]: With dead ends: 38 [2021-11-07 08:41:27,699 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 08:41:27,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 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 08:41:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 08:41:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 08:41:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-07 08:41:27,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-07 08:41:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:27,732 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-07 08:41:27,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-07 08:41:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:41:27,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:27,733 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:27,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 08:41:27,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:41:27,952 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:27,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:27,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-11-07 08:41:27,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:41:27,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773655701] [2021-11-07 08:41:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:27,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:41:27,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:41:27,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:41:28,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 08:41:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:28,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:41:28,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:28,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:28,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:28,374 INFO L354 Elim1Store]: treesize reduction 156, result has 19.2 percent of original size [2021-11-07 08:41:28,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 55 [2021-11-07 08:41:28,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:41:28,807 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 1 case distinctions, treesize of input 53 treesize of output 29 [2021-11-07 08:41:28,839 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 08:41:28,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:41:29,185 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 08:41:29,186 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:41:29,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773655701] [2021-11-07 08:41:29,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773655701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:29,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:29,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 08:41:29,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578944904] [2021-11-07 08:41:29,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:41:29,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:41:29,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:41:29,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:41:29,191 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:29,893 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-07 08:41:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:41:29,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 08:41:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:29,897 INFO L225 Difference]: With dead ends: 35 [2021-11-07 08:41:29,897 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 08:41:29,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:41:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 08:41:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-11-07 08:41:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-07 08:41:29,905 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-07 08:41:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:29,905 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-07 08:41:29,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-07 08:41:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:41:29,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:29,907 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:29,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:30,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:41:30,108 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:30,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:30,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-11-07 08:41:30,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:41:30,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572040791] [2021-11-07 08:41:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:30,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:41:30,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:41:30,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:41:30,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 08:41:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:30,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:41:30,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:30,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:41:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:30,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:41:30,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572040791] [2021-11-07 08:41:30,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572040791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:30,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:30,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-11-07 08:41:30,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392285385] [2021-11-07 08:41:30,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:41:30,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:41:30,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:41:30,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:41:30,559 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 08:41:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:31,088 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-11-07 08:41:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:41:31,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 14 [2021-11-07 08:41:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:31,093 INFO L225 Difference]: With dead ends: 43 [2021-11-07 08:41:31,093 INFO L226 Difference]: Without dead ends: 34 [2021-11-07 08:41:31,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:41:31,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-07 08:41:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2021-11-07 08:41:31,099 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 08:41:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-07 08:41:31,100 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-07 08:41:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:31,101 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-07 08:41:31,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 08:41:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-07 08:41:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:41:31,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:31,102 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:31,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:31,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:41:31,303 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:31,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-11-07 08:41:31,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:41:31,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270446440] [2021-11-07 08:41:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:31,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:41:31,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:41:31,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:41:31,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 08:41:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:31,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:41:31,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:31,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:41:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:31,903 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:41:31,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270446440] [2021-11-07 08:41:31,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270446440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:41:31,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:31,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-07 08:41:31,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650142389] [2021-11-07 08:41:31,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:41:31,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:41:31,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:41:31,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:41:31,906 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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 08:41:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:32,772 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-11-07 08:41:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:41:32,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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 14 [2021-11-07 08:41:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:32,775 INFO L225 Difference]: With dead ends: 58 [2021-11-07 08:41:32,776 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 08:41:32,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:41:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 08:41:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-11-07 08:41:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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 08:41:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-07 08:41:32,784 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 14 [2021-11-07 08:41:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:32,784 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-07 08:41:32,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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 08:41:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-07 08:41:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:41:32,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:32,789 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:32,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 08:41:33,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:41:33,002 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:33,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-11-07 08:41:33,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:41:33,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809269164] [2021-11-07 08:41:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:33,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:41:33,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:41:33,005 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:41:33,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 08:41:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:41:33,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:33,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:41:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:33,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:41:33,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809269164] [2021-11-07 08:41:33,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809269164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:41:33,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:33,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-11-07 08:41:33,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528280020] [2021-11-07 08:41:33,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:41:33,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:41:33,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:41:33,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:41:33,653 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:34,144 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-07 08:41:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:41:34,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 08:41:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:34,147 INFO L225 Difference]: With dead ends: 41 [2021-11-07 08:41:34,147 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 08:41:34,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:41:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 08:41:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-07 08:41:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-07 08:41:34,155 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-11-07 08:41:34,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:34,155 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-07 08:41:34,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-07 08:41:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:41:34,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:34,159 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:34,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 08:41:34,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:41:34,360 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-11-07 08:41:34,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:41:34,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727915663] [2021-11-07 08:41:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:34,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:41:34,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:41:34,363 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:41:34,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 08:41:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:34,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:41:34,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:34,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 12 treesize of output 10 [2021-11-07 08:41:34,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:34,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:34,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:34,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2021-11-07 08:41:34,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:34,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:34,927 INFO L354 Elim1Store]: treesize reduction 457, result has 13.1 percent of original size [2021-11-07 08:41:34,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 118 [2021-11-07 08:41:35,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:41:35,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727915663] [2021-11-07 08:41:35,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 08:41:35,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1257997091] [2021-11-07 08:41:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:35,751 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 08:41:35,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/cvc4 [2021-11-07 08:41:35,755 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 08:41:35,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 08:41:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:36,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:41:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:36,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 13 treesize of output 11 [2021-11-07 08:41:36,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2021-11-07 08:41:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2021-11-07 08:41:36,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:41:36,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:41:36,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:41:36,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:41:36,681 INFO L354 Elim1Store]: treesize reduction 62, result has 19.5 percent of original size [2021-11-07 08:41:36,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 135 treesize of output 117 [2021-11-07 08:41:37,176 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-07 08:41:37,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 153 treesize of output 85 [2021-11-07 08:41:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:37,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:41:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:38,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1257997091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:41:38,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:38,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-07 08:41:38,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829949778] [2021-11-07 08:41:38,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:41:38,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:41:38,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:41:38,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:41:38,289 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:45,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:45,859 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2021-11-07 08:41:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:41:45,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 08:41:45,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:45,861 INFO L225 Difference]: With dead ends: 69 [2021-11-07 08:41:45,861 INFO L226 Difference]: Without dead ends: 67 [2021-11-07 08:41:45,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:41:45,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-07 08:41:45,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2021-11-07 08:41:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-07 08:41:45,880 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 16 [2021-11-07 08:41:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:45,881 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-07 08:41:45,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-07 08:41:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:41:45,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:45,883 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:45,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-07 08:41:46,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:46,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:41:46,287 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:46,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:46,287 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-11-07 08:41:46,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:41:46,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799323234] [2021-11-07 08:41:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:46,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:41:46,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:41:46,290 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:41:46,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 08:41:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:41:46,675 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:41:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:41:46,934 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-07 08:41:46,934 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:41:46,935 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:41:46,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:47,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:41:47,142 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:47,145 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:41:47,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:41:47 BoogieIcfgContainer [2021-11-07 08:41:47,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:41:47,184 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:41:47,185 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:41:47,185 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:41:47,185 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:41:27" (3/4) ... [2021-11-07 08:41:47,188 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 08:41:47,249 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30acdb8f-de7e-4103-94eb-d2274ae50262/bin/uautomizer-AkOaLMaTGY/witness.graphml [2021-11-07 08:41:47,249 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:41:47,250 INFO L168 Benchmark]: Toolchain (without parser) took 21035.91 ms. Allocated memory was 56.6 MB in the beginning and 98.6 MB in the end (delta: 41.9 MB). Free memory was 34.1 MB in the beginning and 63.0 MB in the end (delta: -28.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:47,251 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 56.6 MB. Free memory is still 37.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:41:47,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.08 ms. Allocated memory is still 56.6 MB. Free memory was 33.9 MB in the beginning and 39.4 MB in the end (delta: -5.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:47,252 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.74 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 37.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:41:47,253 INFO L168 Benchmark]: Boogie Preprocessor took 62.50 ms. Allocated memory is still 56.6 MB. Free memory was 37.8 MB in the beginning and 36.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:47,254 INFO L168 Benchmark]: RCFGBuilder took 547.91 ms. Allocated memory is still 56.6 MB. Free memory was 36.4 MB in the beginning and 24.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:47,254 INFO L168 Benchmark]: TraceAbstraction took 19979.94 ms. Allocated memory was 56.6 MB in the beginning and 98.6 MB in the end (delta: 41.9 MB). Free memory was 24.3 MB in the beginning and 65.1 MB in the end (delta: -40.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:47,255 INFO L168 Benchmark]: Witness Printer took 64.78 ms. Allocated memory is still 98.6 MB. Free memory was 65.1 MB in the beginning and 63.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:41:47,258 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 56.6 MB. Free memory is still 37.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.08 ms. Allocated memory is still 56.6 MB. Free memory was 33.9 MB in the beginning and 39.4 MB in the end (delta: -5.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.74 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 37.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.50 ms. Allocated memory is still 56.6 MB. Free memory was 37.8 MB in the beginning and 36.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 547.91 ms. Allocated memory is still 56.6 MB. Free memory was 36.4 MB in the beginning and 24.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19979.94 ms. Allocated memory was 56.6 MB in the beginning and 98.6 MB in the end (delta: 41.9 MB). Free memory was 24.3 MB in the beginning and 65.1 MB in the end (delta: -40.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Witness Printer took 64.78 ms. Allocated memory is still 98.6 MB. Free memory was 65.1 MB in the beginning and 63.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 1 [L32] b[0] = 1 [L33] i=1 VAL [N=2] [L33] COND TRUE i