./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF --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 46a2982bcd9fbf87ad95f35e8d160ffed7259af3c1cb1d5fe78d4df5a4783123 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:58:49,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:58:49,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:58:49,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:58:49,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:58:49,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:58:49,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:58:49,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:58:49,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:58:49,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:58:49,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:58:49,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:58:49,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:58:49,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:58:49,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:58:49,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:58:49,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:58:49,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:58:49,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:58:49,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:58:49,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:58:49,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:58:49,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:58:49,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:58:49,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:58:49,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:58:49,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:58:49,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:58:49,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:58:49,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:58:49,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:58:49,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:58:49,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:58:49,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:58:49,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:58:49,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:58:49,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:58:49,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:58:49,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:58:49,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:58:49,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:58:49,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:58:49,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:58:49,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:58:49,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:58:49,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:58:49,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:58:49,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:58:49,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:58:49,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:58:49,776 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:58:49,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:58:49,776 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:58:49,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:58:49,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:58:49,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:58:49,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:58:49,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:58:49,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:58:49,778 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:58:49,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:58:49,778 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:58:49,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:58:49,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:58:49,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:58:49,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:58:49,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:58:49,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:58:49,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:58:49,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:58:49,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:58:49,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:58:49,781 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:58:49,781 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:58:49,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:58:49,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:58:49,782 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_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46a2982bcd9fbf87ad95f35e8d160ffed7259af3c1cb1d5fe78d4df5a4783123 [2021-11-20 06:58:50,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:58:50,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:58:50,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:58:50,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:58:50,077 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:58:50,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2021-11-20 06:58:50,174 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/data/fa4608e7f/3d04cf053e1b4a72b6c51fce13ccdf4a/FLAGc98719760 [2021-11-20 06:58:50,715 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:58:50,716 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2021-11-20 06:58:50,723 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/data/fa4608e7f/3d04cf053e1b4a72b6c51fce13ccdf4a/FLAGc98719760 [2021-11-20 06:58:51,101 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/data/fa4608e7f/3d04cf053e1b4a72b6c51fce13ccdf4a [2021-11-20 06:58:51,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:58:51,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:58:51,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:58:51,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:58:51,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:58:51,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54421c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51, skipping insertion in model container [2021-11-20 06:58:51,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:58:51,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:58:51,341 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i[816,829] [2021-11-20 06:58:51,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:58:51,382 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:58:51,404 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i[816,829] [2021-11-20 06:58:51,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:58:51,459 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:58:51,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51 WrapperNode [2021-11-20 06:58:51,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:58:51,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:58:51,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:58:51,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:58:51,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,534 INFO L137 Inliner]: procedures = 16, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2021-11-20 06:58:51,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:58:51,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:58:51,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:58:51,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:58:51,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:58:51,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:58:51,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:58:51,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:58:51,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51" (1/1) ... [2021-11-20 06:58:51,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:58:51,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:51,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:58:51,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:58:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:58:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:58:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:58:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:58:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:58:51,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:58:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:58:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:58:51,767 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:58:51,769 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:58:52,051 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:58:52,059 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:58:52,059 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 06:58:52,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:58:52 BoogieIcfgContainer [2021-11-20 06:58:52,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:58:52,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:58:52,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:58:52,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:58:52,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:58:51" (1/3) ... [2021-11-20 06:58:52,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8d3e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:58:52, skipping insertion in model container [2021-11-20 06:58:52,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:58:51" (2/3) ... [2021-11-20 06:58:52,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8d3e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:58:52, skipping insertion in model container [2021-11-20 06:58:52,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:58:52" (3/3) ... [2021-11-20 06:58:52,085 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2021-11-20 06:58:52,092 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:58:52,093 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:58:52,149 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:58:52,159 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 [2021-11-20 06:58:52,159 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:58:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 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) [2021-11-20 06:58:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:58:52,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:52,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:58:52,186 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:52,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1890477095, now seen corresponding path program 1 times [2021-11-20 06:58:52,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:52,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554291110] [2021-11-20 06:58:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:52,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:58:52,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:52,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554291110] [2021-11-20 06:58:52,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554291110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:58:52,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:58:52,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:58:52,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481216522] [2021-11-20 06:58:52,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:58:52,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:58:52,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:52,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:58:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:58:52,456 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 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) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:52,491 INFO L93 Difference]: Finished difference Result 52 states and 76 transitions. [2021-11-20 06:58:52,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:58:52,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 06:58:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:52,514 INFO L225 Difference]: With dead ends: 52 [2021-11-20 06:58:52,514 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 06:58:52,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:58:52,528 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:52,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:58:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 06:58:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-20 06:58:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2021-11-20 06:58:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-20 06:58:52,579 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2021-11-20 06:58:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:52,580 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-20 06:58:52,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-20 06:58:52,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:58:52,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:52,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:58:52,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:58:52,587 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:52,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1812867813, now seen corresponding path program 1 times [2021-11-20 06:58:52,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:52,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895397853] [2021-11-20 06:58:52,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:52,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:58:52,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:52,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895397853] [2021-11-20 06:58:52,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895397853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:52,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079117865] [2021-11-20 06:58:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:52,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:52,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:52,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:52,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:58:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:52,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:58:52,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:58:52,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:58:52,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079117865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:58:52,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:58:52,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-20 06:58:52,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904655851] [2021-11-20 06:58:52,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:58:52,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:58:52,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:58:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:58:52,840 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:52,891 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-11-20 06:58:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:58:52,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:58:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:52,893 INFO L225 Difference]: With dead ends: 48 [2021-11-20 06:58:52,894 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 06:58:52,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:58:52,896 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:52,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:58:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 06:58:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-11-20 06:58:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-20 06:58:52,904 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2021-11-20 06:58:52,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:52,905 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-20 06:58:52,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-20 06:58:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:58:52,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:52,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:58:52,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:53,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:53,128 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:53,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2029995939, now seen corresponding path program 1 times [2021-11-20 06:58:53,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:53,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213592203] [2021-11-20 06:58:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:53,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:58:53,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:53,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213592203] [2021-11-20 06:58:53,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213592203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902708172] [2021-11-20 06:58:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:53,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:53,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:53,257 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:53,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:58:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:53,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:58:53,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:58:53,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:58:53,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902708172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:53,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:58:53,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 06:58:53,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829177452] [2021-11-20 06:58:53,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:53,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:58:53,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:53,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:58:53,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:58:53,660 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:53,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:53,717 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-11-20 06:58:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:58:53,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 06:58:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:53,721 INFO L225 Difference]: With dead ends: 57 [2021-11-20 06:58:53,722 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 06:58:53,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:58:53,727 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:53,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 74 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:58:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 06:58:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-20 06:58:53,744 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) [2021-11-20 06:58:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-20 06:58:53,746 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 25 [2021-11-20 06:58:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:53,747 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-20 06:58:53,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-20 06:58:53,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 06:58:53,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:53,752 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:58:53,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:53,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:53,968 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:53,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1256809879, now seen corresponding path program 2 times [2021-11-20 06:58:53,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:53,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974203554] [2021-11-20 06:58:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:53,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:58:54,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:54,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974203554] [2021-11-20 06:58:54,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974203554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:54,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688294421] [2021-11-20 06:58:54,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:58:54,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:54,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:54,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:54,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:58:54,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:58:54,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:54,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:58:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:58:54,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:58:54,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688294421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:54,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:58:54,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-20 06:58:54,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072545670] [2021-11-20 06:58:54,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:54,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:58:54,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:58:54,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:58:54,521 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:54,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:54,678 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2021-11-20 06:58:54,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:58:54,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-20 06:58:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:54,681 INFO L225 Difference]: With dead ends: 81 [2021-11-20 06:58:54,681 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 06:58:54,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:58:54,685 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:54,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 75 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:58:54,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 06:58:54,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2021-11-20 06:58:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-11-20 06:58:54,696 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 31 [2021-11-20 06:58:54,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:54,697 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-11-20 06:58:54,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-11-20 06:58:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:58:54,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:54,700 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:58:54,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:54,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:54,908 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:54,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2044441341, now seen corresponding path program 3 times [2021-11-20 06:58:54,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:54,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666819783] [2021-11-20 06:58:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:54,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:58:55,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:55,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666819783] [2021-11-20 06:58:55,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666819783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:55,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923542860] [2021-11-20 06:58:55,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:58:55,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:55,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:55,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:55,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:58:55,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:58:55,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:55,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:58:55,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-20 06:58:55,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-20 06:58:55,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923542860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:55,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:58:55,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2021-11-20 06:58:55,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961089868] [2021-11-20 06:58:55,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:55,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:58:55,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:58:55,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:58:55,606 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:55,834 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2021-11-20 06:58:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:58:55,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 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 51 [2021-11-20 06:58:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:55,840 INFO L225 Difference]: With dead ends: 120 [2021-11-20 06:58:55,840 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 06:58:55,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:58:55,842 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:55,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 75 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:58:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 06:58:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-11-20 06:58:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 87 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2021-11-20 06:58:55,867 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 51 [2021-11-20 06:58:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:55,868 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2021-11-20 06:58:55,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2021-11-20 06:58:55,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 06:58:55,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:55,873 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:58:55,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:56,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:56,096 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:56,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1514226337, now seen corresponding path program 4 times [2021-11-20 06:58:56,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:56,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187189270] [2021-11-20 06:58:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:56,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 06:58:56,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:56,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187189270] [2021-11-20 06:58:56,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187189270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:56,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434279887] [2021-11-20 06:58:56,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:58:56,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:56,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:56,290 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:56,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:58:56,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:58:56,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:56,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:58:56,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-20 06:58:56,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-20 06:58:56,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434279887] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:56,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:58:56,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2021-11-20 06:58:56,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572514286] [2021-11-20 06:58:56,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:57,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:58:57,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:58:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:58:57,003 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:57,355 INFO L93 Difference]: Finished difference Result 218 states and 260 transitions. [2021-11-20 06:58:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:58:57,356 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-20 06:58:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:57,358 INFO L225 Difference]: With dead ends: 218 [2021-11-20 06:58:57,358 INFO L226 Difference]: Without dead ends: 155 [2021-11-20 06:58:57,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:58:57,361 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 131 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:57,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 102 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:58:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-20 06:58:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-11-20 06:58:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0392156862745099) internal successors, (159), 153 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 159 transitions. [2021-11-20 06:58:57,376 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 159 transitions. Word has length 85 [2021-11-20 06:58:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:57,376 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 159 transitions. [2021-11-20 06:58:57,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 159 transitions. [2021-11-20 06:58:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 06:58:57,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:57,380 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:58:57,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:57,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:57,596 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash -44527969, now seen corresponding path program 5 times [2021-11-20 06:58:57,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:57,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986640544] [2021-11-20 06:58:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:57,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-20 06:58:57,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:57,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986640544] [2021-11-20 06:58:57,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986640544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:57,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272139753] [2021-11-20 06:58:57,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:58:57,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:57,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:57,875 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:57,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa8f4dd-bc82-42fc-9bb3-e40936a4cdb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process